if f(x)=2x^2+12 , what is f(3)

Answer:

y =5

Step-by-step explanation:

m=

−9−7

5−5

=

−16

0

=0

y=mx+b

5=(0)(7)+b

b=5

therefore y = 5

Answer:  y = -2x - 1

Step-by-step explanation:

We can calculate the slope from the two given points.  Slope is the change in y per the change in x, sometimes called the rise (y) over the run (x)

Rise is (-9 -3) = -12

Run is (4 - (-2)) = 6

Slope = Rise/Run = -12/6 = -2

The line is y = -2x + b

Find b by using either of the two known points (solutions).  I'll choose (-2,3) [because I like smaller numbers]

y = -2x + b

3 = -2*(-2) + b

b = -1  [That was only slightly easier than -9 = -2*(4) + b; b = -1]

The equation is y = -2x - 1

Answer:

10 + 78.567 = 88.567

Step-by-step explanation: thank you

Answer:

9.30918

Step-by-step explanation:

Answer:

length = 12

width = 9

Step-by-step explanation:

Let w= width of rectangle

length = w + 3

2w + 2(w + 3) = 42

2w + 2w + 6 = 42

4w = 36

w = 9 ( width of rectangle)

width = 9 inches

length = 9 + 3 = 12 inches

Answer:

y = -3x + 20

Step-by-step explanation:

Slope: - 3

b = -1 - (-3)(7) = -1 + 21 = 20

Answer:

50+40/2=70

Step-by-step explanation:

mark me as brainliest

#1

[tex]\\ \rm\rightarrowtail 3/8(4)=3/2=1.5h[/tex]

#2

Rest after comedy is Reality shows.

Answer:

RT is an altitude of GRS

Step-by-step explanation:

An altitude is an angle that shoots through the tip of a triangle. RT and QRS share that.

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The Correct statement is :

Step-by-step explanation:

If this is 3L water : 2L bleach then this following measures and answers are the answer.

3L:2L

?L:4L

4L/2L= 2L

so therefore

3L* 2L = 6L

so

6L water : 4L bleach

6L water

Answer: 5a + 5b + 5 - x(a + b)

Step-by-step explanation:

(a + b + 1)2 – (a + b + 1)(x - 2) + (a + b + 1)

2a + 2b + 2 - (ax - 2a + bx -2b -2) + (a + b + 1)

2a + 2b + 2 - ax + 2a - bx +2b +2 + a + b + 1

5a + 5b + 5 - x(a + b)

Larry gold is withholding $22.38 in federal tax income.

The federal government and the majority of states in the US impose income taxes.

Given that Larry gross pay for this week is $375.15

Now we know from the income tax table that the withheld tax is calculated by calculating 6% of the gross pay when there are 2 allowances.

Tax  = 6% of 375.15 = 22.38

Hence the withholding for federal income tax is $22.38 .

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Answer:

The associative property is grouping

Step-by-step explanation:

Answer:

The associative property is the rule that includes grouping of numbers.

Step-by-step explanation:

a. 240 - 144 = 96 Adult males

260 - 129 = 131 Female children

b. 275-225 = 50 more children

c. 225/500 simplifies to 9/20 visitors are adults

d. 240:260

e. 144/500 chance that it is a male child

Okay so for a number 1 they want you to subtract the total from the child or adult. so for males, they want you to subtract 240 from 144. 240 - 144 equals 96 so there are 96 adults in males. moving on to the female we have to find how many children there are so, we have to subtract 260 from 129 which will equal 131. 131 is how many children are females.

For "B" we have to work out how many child visitors there are than adults. Easy we just have to subtract 275 from 225 which will equal 50!

Now for question C, we have to write the adult total in the lowest term what they mean by that is a fraction said to be written using the lowest terms if its numerator and denominator are relatively prime, that is, they have no common factors other than 1. So the lowest term for the adult is 9/4

Now for question D, they want us to make a ratio for the number of males and for the number of females. A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. The ratio for the male is 96:144 (for every 96 adults there are 144 children) The ratio for females is 129:131 (for every 129 female there are 131 children)!

For E it is a probaIlity that there is a 144/500 chance there's a male child! Not much I can explain for E because that's a hard one but that's the answer for E

Answer:

3

Step-by-step explanation:

12÷4= 3

1×3=3

4/1=12/3

Answer:

answer in explanation

Step-by-step explanation:

1. = 7x

2. =10x+ 7y

3. =8A + 10B - 1C

4. = 9M + 13N

5. = 5 x+ 9y + 18z

6. = 6x

7. = 20B

8, = 40C

9. = -18w

Answer:

6.5 rounded from 6.53...

to see if this is correct we can:

13.5+9.5+6.5*3 = 42.5

but since we rounded it we can say its 6.5

Answer:

6.55 meters each day

Step-by-step explanation:

You know that in the end the fence must be 42.6 meters long.

On Monday & Tuesday, he installed 22.95 meters of fence. (We know this because 13.45 + 9.5 = 22.95).

So, how much is left? You find that by subtracting 22.95 from 42.6.

42.6-22.95 = 19.65 meters

There are 3 days left of fencing, and these days he will install equal lengths, so you can divide 19.65 meters by 3 days.

19.65 / 3 = 6.55 meters of fence per day

Answer:B

Step-by-step explanation:

B

Answer:

y = -4/3x - 4

Step-by-step explanation:

Answer:

[tex]\frac{x+3}{x}[/tex]

Step-by-step explanation:

Factorise numerator and denominator

x² - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , then

x² - 9

= x² - 3² = (x - 3)(x + 3)

x² - 3x ← factor out x from each term

= x(x - 3)

Then

[tex]\frac{x^2-9}{x^2-3x}[/tex]

= [tex]\frac{(x-3)(x+3)}{x(x-3)}[/tex] ← cancel common factor (x - 3) on numerator/denominator

= [tex]\frac{x+3}{x}[/tex]

The additional of a triangle's degree measure will always equal 180˚

When the question asks you if a triangle with 112˚, 57˚, and 11˚, you have to add them up and make sure they equal to 180˚

In this case, 112˚ + 57˚ + 11˚ DO add up to 180˚, and is indeed a triangle.

Answer:

at first find the value of x by combining both equations then put the value of x in first equation (2x-9).

I HOPE IT WILL HELP YOU.

Thank you.

TEDDYLOVER

Answer:

C: 1 1/5 miles per hour

Step-by-step explanation:

if you travel 3/5 miles in 1/2 of an hour then you multiply 1/2 and 3/5 by 2 to get how much you traveled in an hour which you get 1 1/5

Step-by-step explanation:

1.

[tex]0 = {x}^{2} - 7x - 18 \\ 0 = {x}^{2} + 2x - 9x - 18 \\ 0 = x(x + 2) - 9(x + 2) \\ 0 = (x + 2)(x - 9) \\ \\ \\ (x + 2) = 0 \: \: \: \: or \: \: \: \: (x - 9) = 0 \\ \\if \: \:x + 2 = 0 \\x = 0 - 2 \\ x = (- 2) \\ \\ if \: \:x - 9 = 0 \\ x = 0 + 9 \\ x = 9 \\ [/tex]

Answer:

By using the formula, Parts /whole = percent/100, ⇒ 25/ 50 × 100 = 50%. So, 50 % of 50 is 25 proportion.

The hourly fee is $3.00 per hour.

It is required to find the hourly fee for the rototiller.

Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.

Given:

Let h represents the hourly fee.

Let C be the total charge and t be the rental time in hours.

C = ht + 43

Putting the given values into the equation, we get:

64 = 7h + 43

7h = 21

h = 3

Therefore, the hourly fee is $3.00 per hour.

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Answer:

x = 2    y = 0

Step-by-step explanation:

Step-by-step explanation:

20 - 12 = 8 so he spent 8$ in 4 days.

8 ÷ 4 = 2, so he spent 2$ each day

The rate of Jaman spending money every day will be $2.

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that Jamal's parents give him $20 to spend at camp. Jamal spends the same amount of money on snacks each day. After 4 days he has $12 left .

The rate of spending money every day will be calculated as,

Spending in 4 days, 20 - 12 =$8

Rate of spending  = 8 ÷ 4 = $2

Therefore, the rate of Jaman spending money every day will be $2.

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Answer:

228.6 centimeters

Step-by-step explanation:

We remember that 1 inch is 2.54 centimeters.

We also know that 7 feet 6 inches is equal to 7*12+6 inches, which equals 90 inches.

So, 7 feet 6 inches is 90 inches is [tex]\boxed{228.6}[/tex] centimeters.

Midsegment is half the parallel side:

ORT is isosceles, the angles O and R are equal and measure:

IRN is isosceles, the angles N and I are equal and measure:

ABC is isosceles, the angles A and B are equal and measure:

Answer:

Step-by-step explanation:

Answer:

73

Step-by-step explanation:

(−2)  

6

+(−3)  

2

Calculate −2 to the power of 6 and get 64.

64+(−3)  

2

Calculate −3 to the power of 2 and get 9.

64+9

Add 64 and 9 to get 73.

73