help me pls and thank you :)

Help Me Pls And Thank You :)

Answers

Answer 1
Answer:  350

Explanation:

Spreadsheet software is strongly recommended. If you have excel, then it's best to use it since it's used practically everywhere. If you don't have excel, then there are tons of free alternatives such as OpenOffice or LibreOffice.

Enter the data as shown. Then form a third column labeled xy which represents multiplying each x and y pair for any given row. Eg: Tom = xy = 7*2 = 14. Use cell references to quickly compute this new column. I don't recommend manually multiplying each pair of items.

Once the xy column is formed, add up everything in it since [tex]\Sigma[/tex] represents summations. The command called "Sum" or "SUM" does this very quickly. In a cell off to the side type in [tex]=Sum(C2:C10)[/tex] which will add up the elements in cell C2, C3, ... all the way up to C10. Don't forget about the equal sign up front. That's needed to execute the command rather than print out text.

The result of the command should be 350

To verify you can manually add up the values to check the answer is correct.

Answer 2

Answer:

First you have to add :-

X = 7+2+5+9+6+10+9+8+4

X= 50

Y = 2+5+7+4+2+9+9+4+10

Y = 52

Now ,

Σ(xy)= 50×52

= 2600

Hope it helpful to you


Related Questions

Help!!! I can’t even find the answer for this question

Answers

Answer:

<1 and <2

Step-by-step explanation:

Adjacent means angles that are next to each other.  This is not the only pair, but <1 and <2  are adjacent.

Say that a certain stadium for professional football has 70,000 seats. What is the shape of the
supply curve for tickets to football games at that stadium? Explain.

Answers

Answer: The shape of the supply curve for tickets to football games at the stadium with 70,000 seats is upward-sloping. This means that as the price of tickets increases, the quantity of tickets supplied also increases.

The reasoning behind this is simple: when the price of tickets is high, there is more incentive for the sellers (e.g. the stadium, ticket resellers, etc.) to sell more tickets. They have the ability to supply more tickets as the demand for tickets at the high price is likely to be higher, thus increasing their profits.

However, it is important to note that the upward slope of the supply curve is not necessarily linear. The supply curve for tickets to football games is likely to be more elastic in the higher price range, meaning that as the price continues to increase, the quantity supplied may increase at a slower rate. This is because at some point, even if the price continues to rise, there will be a limit to how many tickets can actually be sold due to a decrease in demand.

Overall, the upward-sloping shape of the supply curve for tickets to football games at the stadium with 70,000 seats reflects the basic principle of supply and demand: as the price increases, the quantity supplied will also increase, but at some point, the increase in price will lead to a decrease in demand, limiting the quantity supplied.

Step-by-step explanation:

Put a decimal point in the number 26583 so that the 5 has a value of
100
50

Answers

The number as decimal is 26583.0

How to rewrite the number as decimal

From the question, we have the following parameters that can be used in our computation:

Number = 26583

Also, we have the required value of 5 to be

Required = 100

Using the above as a guide, we have the following:

The number 5 must have a value of 100 in the new number i.e. 500

So, we have

Number = 26583

Rewrite as

Number = 26500 + 83

This means that we add 5 at the end

So, we have

Number = 26583.0

Hence, the new number is  26583.0

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Reactive Power VARS Apparent Power VA CD True Power W​

Answers

a. Reactive power is the power lost in the inductive or capacitive load in an AC electrical circuit.

b. Apparent power is the power is the total power delivered to an AC electrical circuit

c. True power is the power lost in a resistive load in an AC electrical circuit.

What is power?

Power is the rate at which work is done.

a. What is reactive power VARS?

Reactive power is the power lost in the inductive or capacitive load in an AC electrical circuit. The reactive power is given by

P' = IVsinФ where

I = current in circuit, V = voltage in circuit  and Ф = load angle

b. What is apparent power VA?

Apparent power is the power is the total power delivered to an AC electrical circuit. The apparent power is given by

S = IV where

I = current in circuit, V = voltage in circuit  

c. What is true power W?

True power is the power lost in a resistive load in an AC electrical circuit. The true power is given by

P' = IVcosФ where

I = current in circuit, V = voltage in circuit  and Ф = load angle

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A population p of migrating butterflies satisfies the equation p = 100,000 -
100,000 (4/5)"
where w is the number of weeks since they began their migration.
Complete the table with the population after different numbers of weeks.
W
р
0
100000
1
20000
2
4000
What is the vertical intercept of the graph?
800
3
160

Answers

The vertical intercept of the graph is 100,000

What is an exponential function?

A function whose value is a constant raised to the power of the argument, especially the function where the constant is e, is called an exponential function.

Given that, the population p of migrating butterflies satisfies the exponential function p = 100,000 (4/5)ⁿ, where n is the number of weeks,

So, we need to find the vertical intercept of the graph,

We know that, vertical intercept = intercept

To find the y-intercept of a line, we will put x = 0,

here x is n,

So, the y-intercept of the graph is = 100,000 (4/5)⁰ = 100,000×1 = 100,000

Therefore, the vertical intercept of the graph is 100,000

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For a particular 4 leaf clover, the highway had to be compacted on the south side making the circles two different sizes. The two circles on the north of the highway have a radius of 128 feet and the two on the south side have radius of 102 feetCalculate the total area of grass seed needed for these four circles

Answers

The total area of the two circles will be 168316.9 square feet.

What is a circle?

The circle is defined as a two-dimensional figure having a fixed point and the number of the points is traced around the curved path at an equal distance from the fixed point. The overall figure is called a circle.

The area of the circle is calculated by the formula:-

Area = πr²

Given that the south side of the highway needed to be compacted in order to create two circles of various sizes for a specific four-leaf clover. The two circles on the north side of the road have a 128-foot radius, whereas the two on the south side have a 102-foot radius.

The total area will be calculated as:-

Area = 2 x π x 128² + 2 x π x 102²

Area = 102943.25 + 65370.25

Area = 168316.9 square feet

Hence, the total area will be 168316.9 square feet.

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Choose all of the values that are solutions to inequality x < -2

Answers

Answer:

The solution to the inequality x < -2 is all real numbers that are less than -2. This means that any number that is less than -2 will satisfy the inequality, but any number that is greater than or equal to -2 will not.

So, the solution set for x < -2 is all real numbers that are less than -2. This solution set can be expressed as (-∞, -2).

Therefore, the values that are solutions to the inequality x < -2 are:

• all real numbers less than -2, such as -3, -4, -5, etc.

Note that -2 itself is not part of the solution set, since it is not less than -2.

A picture of a family crest is 5.1 inches wide. The family needs a reduced copy for the front page of the family
newsletter. The copy must fit in a space 1.3 inches wide. What scale factor should be used on the copy machine to
adjust the size of the picture of the crest?

Answers

Answer:

  0.255 or 25.5%

Step-by-step explanation:

You want the scale factor that reduces 5.1 inches to 1.3 inches.

Scale factor

The scale factor is the ratio of the image size to the original size:

  1.3/5.1 ≈ 0.254902 ≈ 0.255 = 25.5%

__

Additional comment

A scale factor of 0.255 would give an image of 1.3005 inches. That's probably close enough. Rounding to the nearest percent, it would be 25%, which would give an image size of 1.275 inches.

-(3x+1)+7=4-(3x + 2)
Show work

Answers

Answer:

no solution

Step-by-step explanation:

- (3x + 1) + 7 = 4 - (3x + 2) ← distribute parenthesis on both sides

- 3x - 3 + 7 = 4 - 3x - 2

- 3x + 4 = 2 - 3x ( subtract 4 from both sides )

- 3x = - 2 - 3x ( add 3x to both sides )

0 = - 2 ← false statement

this false statement indicates the equation has no solution

-(3x+1)+7=4-(3x + 2)

-3x-1+7=4-3x-2

-3x+6=-3x+2

-3x+3x=-4

0=-4

no solution

A business puchases a computer system for $3,000. The value of the system decreases at a rate of 15% per year. Write an exponentioal function to model this situation. Then determine how much the comoputer will be work after 3 years

Answers

Value of system after 'x' years = [tex]3000*(0.85)^x[/tex]

The value of the computer after 3 years is $1842.375

What is an exponential function?

The formula for an exponential function is f(x) =[tex]a^x[/tex], where 'x' is variable and 'a' is a constant that serves as the function's base and must be bigger than 0. The transcendental number e, or roughly 2.71828, is the most often used exponential function basis.

Given that, computer system values at $3000 decrease at a rate of 15% each year.

If the value decreases by 15%, it means that the new value is 85% of the old value.

new value = old value * (85/100)

new value = old value * 0.85

value in 1st year = $3000

value after 1st year = $3000 * 0.85

value after 2nd year = $3000 * 0.85 * 0.85

value after nth year = $3000 * [tex]0.85^n[/tex]

Value of the system after 3 years = $3000 * [tex]0.85^3[/tex]

= $3000 * 0.614125

= $1842.375

Therefore, The value of the computer system after 3 years  is $1842.375

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Select all of these coordinates that lie on the
line y = 1-2x.
(-5, -9) (-3,7) (4,9) (6, -11)

Answers

The coordinates that lie on the equation of line y = 1 - 2x are P ( -3 , 7 ) and Q ( 6, -11)

What is an Equation of a line?

The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept

And y - y₁ = m ( x - x₁ )

y = y-coordinate of second point

y₁ = y-coordinate of point one

m = slope

x = x-coordinate of second point

x₁ = x-coordinate of point one

The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )

Given data ,

Let the equation of line be represented as A

Now , the value of A is

Let the first point be P ( -3 , 7 )

Let the second point be Q ( 6 , -11 )

The equation of line is y = 1 - 2x

Substituting the values of x and y in the equation , we get

when x = -3

y = 1 - 2 ( -3 )

y = 1 + 6

y = 7

when x = 6

y = 1 - 2 ( 6 )

y = 1 - 12

y = -11

Hence , the coordinates of the equation of line are P ( -3 , 7 ) and Q ( 6, -11 )

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Two gliders collide on an air track. Glider 1 has a mass of 7. 0 kg, and glider 2 has a mass of 4. 0 kg. Before the collision, glider 1 had a velocity of 2. 0 m/s, and glider 2 had a velocity of -5. 0 m/s. If the collision is perfectly elastic, what is the total kinetic energy of both gliders after the collision?

A. -36. 0 J

B. 36. 0 J

C. 64. 0 J

D. 128. 0 J

Answers

For the information provided, the total kinetic energy of both gliders after collision is 13.5 J. In an elastic collision, both momentum and kinetic energy are conserved.

The momentum conservation principle states that the total momentum of the system before the collision is equal to the total momentum after the collision. Mathematically, we can write this as:

m₁v₁i + m₂v₂i = m₁v₁f + m₂v₂f

where m₁ and v₁i are the mass and initial velocity of glider 1, m₂ and v₂i are the mass and initial velocity of glider 2, and v₁f and v₂f are their velocities after the collision.

Using this equation and the given values, we can solve for the final velocities:

(7.0 kg)(2.0 m/s) + (4.0 kg)(-5.0 m/s) = (7.0 kg)v₁f + (4.0 kg)v₂f

14.0 kg·m/s - 20.0 kg·m/s = 7.0 kg·v₁f + 4.0 kg·v₂f

-6.0 kg·m/s = 7.0 kg·v₁f + 4.0 kg·v₂f ---(1)

The kinetic energy of an object is given by the equation:

KE = 1/2 mv²

Therefore, the total kinetic energy of both gliders after the collision can be calculated as:

KE_total = 1/2 m₁ v₁f² + 1/2 m₂ v₂f²

Substituting the values of m₁, m₂, v₁f, and v₂f from equation (1) into this equation, we get:

KE_total = 1/2 (7.0 kg) (0.86 m/s²) + 1/2 (4.0 kg) (5.14 m/s²)

KE_total = 13.5 J

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help me find the measure

Answers

Answer:

= 60°

Step-by-step explanation:

Exterior angle =

[tex] = \frac{360}{n} [/tex]

[tex] = \frac{360}{6} \\ = {60}^{o} [/tex]

= 60°

Claudia is interested in knowing which figure skater competing in the
Olympic Games is most favored to win a gold medal. To sample the
students in her school, she prepares a list of all of the boys and girls in the
school and randomly chooses a sample from each group so that the size of
each group is proportional to the number of boys and girls in the school.
Which sampling method did Claudia use?
OA) simple random sampling
OB) stratified random sampling
OC) systematic random sampling
OD) simple non-random sampling

Answers

Claudia used Stratified Random Sampling (OB).

In stratified random sampling, the population is divided into subgroups (strata) based on a certain characteristic, and a random sample is taken from each stratum. In Claudia's case, she divided the population into two subgroups based on gender (boys and girls), and took a random sample from each group proportional to the number of boys and girls in the school. This method is used when the researcher wants to ensure that the sample is representative of different subgroups in the population.

OD) Is simple non-randon sampling

Step-by-step explanation:

because Claudia randomly choose a sample from each group.

In simple terms, please explain to me what is the difference between horizontal shrink and vertical stretch.

Answers

Answer:

  see attached

Step-by-step explanation:

You want the difference between horizontal shrink and vertical stretch.

Horizontal shrink

A horizontal shrink compresses a graph horizontally. In the attached figure, the original graph is the red circle. The blue ellipse is that circle shrunk horizontally by a factor of 3. It retains the same height, but is compressed sideways.

Vertical stretch

A vertical stretch expands the graph vertically. The green ellipse in the attached figure is the original circle stretched vertically by a factor of 3. The horizontal dimension remains unchanged.

Interchangeable

You will notice that replacing a variable x by x/k effectively accomplishes a stretch by a factor of k in that variable's direction. Similarly, replacing a variable x by kx accomplishes a compression by a factor of k.

Your question suggests that you have noticed the similarities between vertical stretch and horizontal compression. For some figures, there is basically no difference.

Here are a couple of examples of that:

  line y = x. Vertical stretch by 2: y/2 = x, or y = 2x. Horizontal compression by 2: y = 2x. These equations are identical.

  parabola y = x². Vertical stretch by 4: y/4 = x² or y = 4x². Horizontal compression by 2: y = (2x)² = 4x². These equations are identical.

Differences

The differences between stretch in one direction and compression in the other direction are more apparent for figures with multiple reversals of direction. The second attachment shows the sine function (red) vertically stretched (blue) and horizontally compressed (green).

create a table of values to represent the total cost if ben orders 1 or 2 books or spends 41$, $65 OR $125

Answers

The table to represents the total cost for the different numbers of books ordered is:

Number of books     Spending     Total cost

1                                     $41            $44

2                                    $65           $71

3                                    $125          $134

What is an expression?

An expression is written with one or more terms with addition, subtraction, multiplication, and division.

Example:

2.2 + 3x + 4y = 7 is an expression.

3 + 5x = 9 is an expression.

We have,

The book cost = $3

Now,

Spendings = $41, $65, or $125

Now,

Table:

Number of books     Spending     Total cost

1                                     $41            41 + 3 = $44

2                                    $65           65 + 6 = $71

3                                    $125          125 + 9 = $134

Thus,

The table for the total cost is given above.

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The relationship between the amount of energy released by an earthquake and its magnitude is described by this formula. Here E is energy, in joules, and M is magnitude. Approximately how much energy is released by a magnitude 5 earthquake? Select the correct answer.logE=5.24+1.44M

Answers

Approximately 2.51 x 10¹² joules of energy is released by a magnitude 5 earthquake.

What is a logarithmic equation?

A logarithmic equation is an equation that involves a logarithmic function. A logarithmic function is the inverse of an exponential function, and it represents the exponent to which a given base must be raised to obtain a given number.

The formula that relates the energy released by an earthquake to its magnitude is given by:

logE = 5.24 + 1.44M

To find the amount of energy released by a magnitude 5 earthquake, we can substitute M = 5 into the formula and solve for E.

logE = 5.24 + 1.44(5)

logE = 5.24 + 7.2

logE = 12.44

Now we need to convert this logarithmic value to a regular value of E. We can do this by taking the antilogarithm (or exponentiating) both sides of the equation.

10⁽ˡᵒᵍᴱ⁾ = 10⁽¹²ॱ⁴⁴⁾

E = 2.51 x 10¹² joules

Therefore, approximately 2.51 x 10¹² joules of energy is released by a magnitude 5 earthquake.

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For every 3 lemons you buy at a farm stand, the total cost increases by $1.80.
The constant of proportionality is
An equation that relates the total cost y and the number of lemons x is y=____x
Use the equation you wrote to complete the table.



Answers

Answer:

he constant of proportionality is $1.80, since for every 3 lemons the total cost increases by $1.80.

The equation that relates the total cost, y, and the number of lemons, x, is:

y = 1.80 * (x/3) + b

where b is the y-intercept, which represents the cost of 0 lemons. We'll need additional information to determine the value of b.

Here is a table with the values of y and x, assuming b = 0:

x (Number of Lemons) y (Total Cost)

0 0

3 1.80

6 3.60

9 5.40

... ...

Step-by-step explanation:

-
The function f(x) = |x − 1| can be used to determine how far a number is away
from the number 1 on the number line. Find and interpret the given function values
and determine an appropriate domain for the function.
number line showed for reference

-5 -4 -3
-2 -1
O
2 3
f(-5) =
meaning the number
from 1 on the number line. This interpretation
context of the problem.
f(3) =
1 on the number line. This interpretation
the problem.
4 5
is a distance of
meaning the number is a distance of
units away
in the
units away from
in the context of

Answers

Answer:

Step-by-step explanation:

The function f(x) = |x − 1| is a absolute value function that calculates the distance of a number x from the number 1 on the number line. On the number line, numbers to the left of 1 are negative and numbers to the right of 1 are positive.

To find the value of f(x), we first subtract 1 from x to find the distance between x and 1. If the result is positive, then x is to the right of 1 and the absolute value of the result is equal to the distance. If the result is negative, then x is to the left of 1 and the absolute value of the result is equal to the distance.

For example, let's find f(-5):

f(-5) = |-5 - 1| = |-6| = 6

The interpretation of f(-5) is that the number -5 is a distance of 6 units away from the number 1 on the number line.

Now let's find f(3):

f(3) = |3 - 1| = |2| = 2

The interpretation of f(3) is that the number 3 is a distance of 2 units away from the number 1 on the number line.

The domain of the function is all real numbers. The range of the function is all non-negative real numbers.

Claudia records the hours is been studying and a test scores for five test

Answers

The correlation coefficient when Claudia records the hours she spent studying and her test scores for 5 tests is 0.85. This is a strong positive correlation.

How to explain the correlation

Any statistical association between two random variables or bivariate data, whether causal or not, is referred to as dependence or correlation.

Two variables that move together, or in the same direction, are said to have a positive correlation. When one variable rises while the other rises or when one variable falls while the other falls, there is a positive correlation. Theoretically, the same external forces can affect both of these separate variables because they travel in the same direction.

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Claudia records the hours she spent studying and her test scores for 5 tests.

What is the correlation coefficient?

-0.85-0.840.840.85

What is the strength of the model?

Help, please thank you, and have a wonderful day

Answers

Cubic
2 terms
4
X^3/2
1/2

Please helpppp!!!!!!

Answers

Step-by-step explanation:

On the region, (-oo,0.5), the graph formes a upside U shaped , this mean the graph is concave down on this region. this implies that our second derivative is negative and our first derivative is changing negatively.

The graph is concave up from (0.5,oo) since the graph formes a U shape.

This also implies that (0.5) is a inflection point

The function crosses the x axis at -1,0,3

So the 2nd,3rd,6th, 7th options are correct

what is 7/8 of 16 times in half of 30?

Answers

The simplification of the given expression would be = 210

How to simplify the given expression above?

A fraction is defined as the expression of part of a whole value in the form of a denominator and a numerator.

The above statement can be expressed above mathematically as follows:

= 7/8 × 16 × 1/2× 30

= 3360/16

= 210

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Solve the inequality √x+2 > -1.

Answers

The final inequality is x > - 1.

Option D is the correct answer.

What is inequality?

It shows a relationship between two numbers or two expressions.

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal = ≤

Greater than and equal = ≥

We have,

√(x + 2) > -1

Squaring both sides.

x + 2 > (-1)²

x + 2 > 1

Subtracting 2 on both sides.

x > 1 - 2

x > -1

Thus,

x > - 1 is the final inequality.

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The average mass of a certain type of microorganism is 2.4×10^ −6
grams. What is the approximate total mass of 5,000 of these microorganisms?

0.0012 g

0.012

0.12 g



0.00012 g

Answers

Answer:

Below

Step-by-step explanation:

5000   *   2.4 x 10^-6  =

12 000 x 10^-6  g

= .012 g

100 points!!!!!!!!


Martina is playing a carnival game. She is blindfolded while she throws a dart at a board of 12 balloons, as shown below. Each balloon is labeled "S" for small,
"M" for medium, "L" for large, or "XL" for extra-large. The board has 5 small balloons, 1 medium balloon, 4 large balloons, and 2 extra-large balloons. She hits one of the balloons at random and wins a stuffed animal of that size.

(a)Find the odds in favor of Martina winning a medium stuffed animal.

(b) Find the odds against Martina winning a medium stuffed animal.

Answers

Answer:

(a) The odds in favor of Martina winning a medium stuffed animal is 1/12, as there is only 1 medium balloon on the board out of the total of 12 balloons.

(b) The odds against Martina winning a medium stuffed animal is 11/12, as there are 11 balloons on the board that are not medium out of the total of 12 balloons.

Answer:

(a) The odds in favor of Martina winning a medium stuffed animal is 1/12, as there is only 1 medium balloon on the board out of the total of 12 balloons.

(b) The odds against Martina winning a medium stuffed animal is 11/12, as there are 11 balloons on the board that are not medium out of the total of 12 balloons.

Winnie made headbands to sell at the school craft fair. She sells each
headband for $6.25 and her goal is to earn at least $50.00. Write and solve
an inequality to represent this situation, where h represents the number
of headbands Winnie must sell in order to reach her goal.

Answers

Answer:

6.25 x h = 50.000

Step-by-step explanation:

Answer:

8 headbands.

Step-by-step explanation:

Winnie needs to sell AT LEAST 8 headbands. 50 divided by 6.25 is 8. Remember that the phrase "at least" is represented by a greater-than-or-equal-to symbol.

2/3 of the students in Mrs. Gracie’s class are boys . If there are 27 students in the class, how many of them are girls?

Answers

Answer:

9

Step-by-step explanation:

divide 27 by 3

It equals 9

9 x 2 = 18 boys

27-18= 9 girls

An international company has 21,800 employees in one country. If this represents 32.2% of the company's employees, how many employees does it have in
total?
Round your answer to the nearest whole number.
employees
X
Español
?
D

Answers

Answer:

Step-by-step explanation:

The international company has 21,800 employees in one country, which represents 32.2% of the company's total employees. We can use this information to find the total number of employees by solving for the missing value.

Let's call the total number of employees in the company "X".

If the 21,800 employees in one country represent 32.2% of the total employees, we can write an equation to represent this relationship:

0.322 * X = 21,800

Next, we'll isolate X by dividing both sides of the equation by 0.322:

X = 21,800 / 0.322

Using a calculator, we can find that:

X = 68,062.5

Rounding to the nearest whole number, the company has 68,063 employees in total.

So, that's how you can use a percentage to find the total number of employees in the company. By knowing the number of employees in one country and the percentage that this represents of the total, we can find the total number of employees in the company.

If 21,800 employees in one country represents 32.2% of the company's total employees, we can use this information to find the total number of employees. We can set up an equation as follows:

21,800 / 0.322 = X

Where X is the total number of employees.

Now, we can solve for X by multiplying both sides of the equation by 0.322:

21,800 / 0.322 * 0.322 = X * 0.322
7,000 = X

So the company has a total of 7,000 employees.
Rounding to the nearest whole number, the company has 7,000 employees

Hasten plans to choose a book from the section of the store where everything is 25% off he likes expression D -0.25 days to find the sale price of the book it if there is a YZ dollars below correctly write another expression 0.7 5D that will also find the surprise of the book if the original price is de dollars

Answers

Another form of representing the cost of the book is (75/100)×D.

What is a numerical expression?

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

We know, Percentages and decimals are related.

10% in decimal form is equivalent to (10/100) - 0.1 in decimal.

An expression that represents the sale day book price is 0.75D.

Another expression that would represent the cost of the book priced 'D' would be,

= (75/100)×D.

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