Ask question

Ask question

All categories

3 years ago

5

The radius of a cylinder is 3x - 2 cm. The height of the cylinder is x + 3 cm. What is the surface area of the cylinder? Use the

formula A = 2πr^2 + 2πrh.
A. 2π(3x^2 + 10x - 8)
B. 2π(12x^2 + 7x - 2)
C. 2π(12x^2 - 2x +13)
D. 2π(12x^2 - 5x -2)

1 answer:

Anestetic [448]3 years ago

7 0

Surface area = 2 pi (3x-2)^2 + 2 pi (3x -2) ( x + 3)

= 2 pi (9x^2 - 12x + 4 + 3x^2 + 7x - 6

= 2pi(12x^2 - 5x - 2)

Its D

You might be interested in

What is the surface area of the triangular prism?

Svetlanka [38]

Answer:

84

Step-by-step explanation:

Using pythag theorem we can find the last side of the triangle, which is equal to 5 after we have this we simply add up the areas of each individual shape like (1/2*3*4)+(1/2*3*4)+(6*5)+(3*6)+(4*6)

6 0

3 years ago

svlad2 [7]

Answer:

????

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Mikey has $100 to spend on books. She wants to buy at least 14 books. Hardback books cost $15.00 and paperback books cost $7.00.

fomenos

A. x+y<100
15x+7y>14 is the right answer

8 0

3 years ago

5-2(a+3b)/2 When a=4 and b=1.

nirvana33 [79]

Hello macelynn190!

$\huge \boxed{\mathfrak{Question} \downarrow}$

$\huge \tt \frac{5 - 2(a + 3b)}{2}$

$\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}$

To solve this question we need to substitute the given values of 'a' & 'b' in the equation & then simplify it.

Given,

a = 4
b = 1

Now, substitute this in the place of 'a' & 'b'..

$\large \tt \frac{5 - 2(a + 3b)}{2} \\ = \large \underline{\underline{\tt \: \frac{5 - 2((4) + 3(1))}{2} }}$

Lastly, simplify it...

$\large \tt \: \frac{5 - 2((4) + 3(1))}{2} \\ = \large \tt\frac{5 - 2(4 + 3)}{2} \\ = \large \tt \: \frac{5 - 2(7)}{2} \\ = \large \tt \: \frac{5 - 14}{2} \\ = \large \tt\frac{-9}{2} \\ = \large \boxed{\boxed{ \bf \: -\frac{9}{2}=-4.5}}$

The answer is <u>-</u><u>9</u><u>/</u><u>2</u><u> </u><u>or </u><u>-</u><u>4</u><u>.</u><u>5</u>

__________________

Hope it'll help you!

ℓu¢αzz ッ

5 0

3 years ago

Read 2 more answers

NEEDING SMART PPL

lesya [120]

Answer:

D

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers