Mathematics Middle School

help me please if you know how to do this

Answers

Answer 1

Answer:hi

Step-by-step explanation:

sorry i needed the points

Answer 2

Answer:

135.6 ft²

Step-by-step explanation:

Surface area of triangular pyramid:

In the triangular pyramid, base is an equilateral triangle, and the lateral faces are congruent triangles. So, to find the surface area add the area of base triangle with the area of 3 lateral triangles.

a) Base area of pyramid:

b= 8 cm

h = 6.9 cm

[tex]\boxed{\bf base \ area \ of \ pyramid = \dfrac{1}{2}*b*h}[/tex]

[tex]= \dfrac{1}{2}*8*6.9\\\\=4*6.9\\\\= 27.6 \ ft^2[/tex]

b) Area of one lateral surface area of pyramid:

b = 8 cm

slant height = l = 9 cm

[tex]\boxed{\text{\bf area of one lateral surface area of the pyramid = }\dfrac{1}{2}b*l}[/tex]

[tex]\sf = \dfrac{1}{2}*8*9\\\\= 4 * 9\\\\= 36 \ ft^2[/tex]

c) Lateral surface area of the pyramid = 3 * area of one lateral surface area of pyramid

= 3 * 36

= 108 ft²

d)TSA of pyramid:

[tex]\boxed{\text{\bf Total surface area of pyramid = base area + lateral surface area}}[/tex]

= 27.6 + 108

= 135.6 ft²

Related Questions

if the equation is 9=3(x+2), what does x equal?

Answers

9=3(x+2)
9=3x+6
3x=3
x=1

Answer:

Step-by-step explanation:

To solve for x, we can isolate x on one side of the equation by undoing the operation of the expression inside the parentheses. To do this, we need to subtract 2 from both sides of the equation:

9 = 3(x + 2)

9 = 3x + 6

3 = 3x

Finally, we divide both sides by 3 to obtain:

x = 1

So, the value of x is 1.

please help, i only need help on the surface area

Answers

Answer: 376

Step-by-step explanation:

Surface Area = 2×(2×14 + 2×10 + 14×10) = 376 feet

mathhelp i added a pin below

Answers

Answer:

2/12 of a mile

Step-by-step explanation:

Yes the answer is is 2/12 of a mile

PLEASEEE HELPPP ILL GIVE 5 STARS

Answers

Answer:

[tex](7a \cdot 5b) \div 6c \cdot 2d[/tex]

Step-by-step explanation:

If there is both multiplication and division in an expression and no parentheses, you start solving from left to right. Since in the expression [tex]7a \cdot 5b \div 6c \cdot 2d[/tex] you would start by solving [tex]7a \cdot 5b[/tex], (because it's at the leftmost part of the expression) it won't matter whether you put parentheses around [tex]7a \cdot 5b[/tex] or not. Therefore, the expression [tex](7a \cdot 5b) \div 6c \cdot 2d[/tex] is equivalent to [tex]7a \cdot 6b \div 6c \cdot 2d[/tex].

Answer:
7a*5b/6c*2d (the last one is the correct answer)

Question 14
Part A and Part B please help.

Answers

Answer: A: Yes

B: 12 Customers

Step-by-step explanation:

Part A: Yes since each time it can go up by 1 for customers and 48 for towers each time

Part B: 1 customer (thousands) is equal to 48 towers

so if there are 576 towers let's divide: 576/48 = 12

There will be 12 customers (thousands) for 575 towers

A:Yes B:12 ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀

a
35°

b
48°

c
69°

d
78°

Answers

Answer:

Answer is in the attached photo.

Step-by-step explanation:

Solution

The solution is in the attached photo, do take note to solve this question, angles properties must be used.

Answer:

x=48°

Step-by-step explanation:

We can see the line at the top. 52°+y+59°=180° because these angles are supplementary angles. We can solve this problem:

52°+y+59°=180°

y=180-52-59

y=180-111

y=80-11

y=69°

because the angles in a triangle add up to 180°, y+63°+x=180°, or

69°+63°+x=180°

We can solve it from here:

69+63+x=180

120+12+x=180

132+x=180

x=180-132

x=80-32

x=48°

PLEASE MARK AS BRAINLIEST

The tree grew from 32 ft to 45 ft in the span of ten years.
Find the percent change to the nearest whole percent

Answers

Answer:

40.63% to the nearest whole percent is 41

Step-by-step explanation:

(45 - 32) / 32) * 100 = 40.63 %

To round 40.63 to the nearest whole number consider the tenths’ value of 40.63, which is 6 and equal to or more than 5. Therefore, we have to round up: the whole number part of 40.63, 40, increases by 1 to 41, and the decimal point and all digits (.63) are removed...

40.63 rounded to the nearest whole number = 41

What is the area of this polygon?

Answers

Answer:

258 ft

Step-by-step explanation:

seperate the polygon into two boxes that way u have one big box that is 21 ft in width and 8 ft in height. Then multiply 21*8 to find the area of the box which is 168.

for the other box you can find the height by subtracting 18 ft and 8 ft from the first box which gives a height of 10 ft. To find the wisth you have to subtract 21-12 which is 9. Now you can multiply 10*9=90

Add the two boxes together:

90+168=258

The Area of the Polygon is 258 ft.

Help Please!
Question: select all the equations that can be represented by a straight line when graphed on the coordinate plane

B; u=7t³ -10
C: u=2t-5
D:u=8t-2
E u= 1/t +3
F: - 2t+ 3u=6
G: u=-4( t + 3)

Answers

C, D, F, G. Tip next time use Desmond graphing calculator it’s a free helpful tool

p-6=2 UHMMMM HELP PLS...

Answers

I'm assuming you are solving for p:

First isolate p by moving the other values to the other side.

P - 6 = 2

P = 2 + 6

P = 8

P=8 because if you add 6+2 it equals 8

Which expression is equivalent to 4−a−a−a?'

4−3a^3, a, 4−3a, or 1−a^3

Answers

Answer: 4-3a

Step-by-step explanation:

Answer:
4-3a

Step-by-step:
=4-2a-a
=4-3a

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Answers

PLEASE GIVE BRAINLIEST!

thank you and have a good day :)

Answer:

First question's answer: 28y

Second question's answer: c + 12

Step-by-step explanation:

first question explanation:

7(4y) =28y

7 times 4 is 28, simply attach the y on.

Second question explanation

(0 + c) + 12 = c + 12

0 + c simplifies to just c

c + 12 cannot be simplified even more

hope this helps :)

Answer:

1. 28y

2. c + 12

factor the polynomial an-mn-n^2+ma

Answers

Answer:

Reformatting the input :Changes made to your input should not affect the solution: (1): "n2" was replaced by "n^2". 1 more similar replacement(s).STEP 1:Trying to factor a multi variable polynomial 1.1 Factoring m2 - mn + n2 Try to factor this multi-variable trinomial using trial and error Factorization failsFinal result : m2 - mn + n2

Step-by-step explanation:

Legit SOS I will mark the best one brainliest

Answers

Answer:There are 14 boys and 8 girls

Step-by-step explanation:

if we symbolize girls as g boys will be g+6;

then if boy/girl=7/4

the[tex]\frac{g+6}{g} =\frac{7}{4} \\4*(g+6)=7g\\4g+24=7g\\3g=24\\g=8\\boys=g+6=14[/tex]n

PLEASE HELP ILL GIVE 5 STARS TO THE PERSON WHO SAYS THE CORRECT ANSWER

Answers

PLEASE GIVE BRAINLIEST
thank you and have a good day :)

Answer:

3q^2

Step-by-step explanation:

Simplify the numerator and then divide it by the denominator

List the sample space of a fair, 11-sided number cube rolled while playing a board game.

S = {1,11}
S = {1}
S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
S = {1, 2, 3 ,4, 5, 6, 7, 8, 9, 10, 11}

Answers

6x6 that’s the answer

please help me thanks

Answers

Answer:

Step-by-step explanation:

The area of a triangle is (1/2) * base * height. In this case, the base is the distance between (-5, -2) and (1, -2), meaning it's 6 units. The height is the distance from (-3, 5) to the line y = -2, so the height is 7 units. So, the area is (1/2) * 6 * 7 = 21 square units

21 because the base is 6 and height is 7

help i’m confused about this question.

Answers

It should be this and if you have questions on how I did it just ask

Answer: X= -4

Step-by-step explanation:

4x+28= -6x-12 (28-28), (12-28)

4x= -6x - 40

(add 6x to both sides)

4x+ 6x= -6x-40 + 6x

(combine 4x+6x)

10x = -40

(divide 10)

10x/10x

-40/10x

X= -4

please help (fractions)

Answers

Answer: 2/15 and 9/10

Step-by-step explanation:

Set up cross-multiplication.

If Michelle reads 1/3 book in 2 1/2 hours, she reads X in 1 hour.

1/3 2 1/2

x 1

1/3 = 2 1/2 x

divide by 2 1/2

1/3 divided by 2 1/2 = convert 2 and a half to 5/2

1/3 divided by 5/2 - keep, change, flip. (your teacher should have covered a method like that)

1/3 times 2/5 is 2/15.

For question 2, lets do the same thing.

3/5 times 2/3 equals x times 1

3/5 times 1 is 3/5

2/3 times x is 2/3x

(this looks better on paper)

3/5=2/3x

divide by 2/3

answer - he will finish 9/10 assignment in the hour

Q1
1/3 book = 2 1/2 (5/2) hours
1/3 *2/5 = 1 hour
2/15 book reading in 1 hour

Q2
3/5 = 2/3 hours
3/5 * 3/2 = 1 hour
9/10 assignment in one hour

The map shows four platforms of a zip line course. The actual distance from Platform A to Platform B is 20 yd, and from Platform B to Platform C is 60 yd. What factor can you multiply each length on the map by to get the actual distance?

Answers

Answer:

Step-by-step explanation:

1 x 20 = 20

3 x 20 = 60

Answer:

First answer: 20

Second answer: 100 yd

Step-by-step explanation:

Hope this helps

help please thanks for being kind and helpful if you do!

Answers

Answer is 48 cm ^2

Step by step

A = L x W

First I will find the total area then subtract the cut out section

A = 7 x 8 = 56

A = 2 x 4 = 8

56 - 8 = 48 cm ^2

See attachment

Write an equation that you can use to find the value of x. Perimeter of triangle: 16 in. An equation that you can use is 16=

Answers

Answer:

3x =16 is the required equation.

Step-by-step explanation:

You get out of school and walk north for 20 minutes. You

travel 1. 6 km. What is your average velocity?

1

Answers

Answer:

Step-by-step explanation:

Velocity is change in displacement over change in time.

v = d/t

In this problem, d = 1.6 km and t = 20 minutes

To find the velocity, divide 1.6 by 20, and you get 0.08 km/min.

You could also convert this to km/hour by dividing 1.6 km by 1/3 hours, and the velocity would be 4.8 km/hour.

4.8 km/hour because you times everything by 3

Evaluate the left hand side to find the value of a in the equation in simplest form.

Answers

Answer:

give some more information about the question

PLS HELPP QUICK!!!!
On average, Emily drinks 1/6 of an 8-ounce glass of water in 1/20 of an hour. How many glasses of water does she drink in one hour?

On the double number line below, fill in the given values, then use multiplication to find the missing value. Enter your answers as fractions, mixed numbers, or whole numbers.

Answers

Answer: 3 1/3

Step-by-step explanation:

glasses/hour = ((1/6) glasses) / ((1/20) hour)

= ((1/6) glasses) * (20/hour)

=20 glasses / 6 hour

=10 glasses / 3 hour

= 3 1/3 glasses/hour

If rectangle ABCD is transformed to create rectangle A’B’C’D’, and the rule used was (x, y) --> (x, -y), which transformation has occurred?

A) Reflection across the y-axis
B) Reflection across the x-axis
C) Rotation of 90° around the origin
D) Translation

Answers

Answer: B) Reflection across the x-axis

Step-by-step explanation:

Please help I will mark the best one brainliest

Answers

Answer:

Step-by-step explanation:

bro z is = to -6

Z=-6

so 5(-6+6)=0 i think bro send me a comment if its wrong

Heeeeeeeeeeelp meeeeeeeee

Answers

6x + 24 + 1
= 6x + 25

In the morning, the temperature was
–
10°C. By the afternoon, it had risen to
–
2°C. What was the change in temperature from the morning to the afternoon?

Answers

Answer:

Change in temperature is +8° C

Step-by-step explanation:

Change in temperature = Final temperature - Initial temperature:

=ΔT = [tex]F_{T} - I_{T}[/tex]

= (- 2° C)- (- 10° C)

= [tex]- 2 + 10[/tex]

∴ Change in temperature = + 8° C

If in the morning is was 10 degrees C then that means the temperature dropped 8 degrees C by the time it was the afternoon, but if it was 2 degrees C in the morning, that means it rose 8 degrees by the afternoon

what is this aswer pls im awarding 40 pts i need the answer NOW pls...

Answers

Answer:

2/3

Step-by-step explanation:

5/9 ÷ 5/6 = 5/9 x 6/5 = 30/45 = 6/9 = 2/3

So, the answer is 2/3

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