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S_A_V [24]
3 years ago
8

Find the surface area of the cylinder in terms of x.

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
7 0
Surface area in units of PI = 2 x r x h +2 x r^2

first picture:

r = 7, h = 18

2 x 7 x 18 + 2 x 7^2

252 + 98

350 PI cm^2

2nd picture:  

2 x 9 x 20  +2 x 9^2

360 + 162

522 PI in^2


svlad2 [7]3 years ago
4 0
Surface area = 2πr² + 2πrh  

Surface are = 2π (7)² + 2π(7)(18) = 98π + 252π = 350π cm²


Surface area = 2πr² + 2πrh  

Surface are = 2π (9)² + 2π(9)(20) = 162π + 360π = 522π cm²
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When Sam’s little brother was born, he was 18 inches tall. Each year, he grows an average of 3 inches. Sam’s brother continues t
andrew-mc [135]

Answer:

45

Step-by-step explanation:

year 1 : 18 in

every year after that he grows 3 in so 3 in so 3x9=27

then 27+18=45

8 0
3 years ago
Jada is solving the equation shown below. Negative one-half (x + 4) = 6 Which is a possible first step to begin to simplify the
elena-14-01-66 [18.8K]

The two options that are the possible first step to begin to simplify the equation are (c) Multiply both sides of the equation by –2. and (d). Distribute Negative one-half over (x + 4).

<h3>How to determine which two options are the possible first step to begin to simplify the equation?</h3>

The equation is given as:

Negative one-half (x + 4) = 6

Rewrite the above equation properly

So, we have

-1/2(x + 4) = 6

A possible first step is to multiply both sides of the equation -1/2(x + 4) = 6 by -2

So, we have

x + 4 = -12

Another possible first step is to distribute the expression -1/2(x + 4) in the equation

So, we have

-1/2x - 1/2 * 4 = 6

Hence, the two options that are the possible first step to begin to simplify the equation are (c) Multiply both sides of the equation by –2. and (d). Distribute Negative one-half over (x + 4).

Read more about equations at:

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3 0
1 year ago
A number decreased by two is at most four or at least nine
JulsSmile [24]
x-2  \leq  4

or

x-2   \geq 9
6 0
4 years ago
Read 2 more answers
How to find third coordinate when given midpoint and a point?
IgorLugansk [536]
Example : 
u have an endpoint at (6,5)......ad the midpoint is (4,2)....find the other endpoint.

midpoint formula : (x1 + x2) / 2, (y1 + y2) / 2
one endpoint (6,5)....x1 = 6 and y1 = 5
other endpoint (x,y)...x2 = x and y2 = y
sub into the formula
m = (6 + x) / 2, (5 + y) / 2

okay, so the midpoint is (4,2)....so ur x value will equal 4
(6 + x) / 2 = 4...multiply both sides by 2
6 + x = 4 * 2
6 + x = 8
x = 8 - 6
x = 2 <==

midpoint is (4,2)....so the y value will equal 2
(5 + y) / 2 = 2 ...multiply both sides by 2
5 + y = 2 * 2
5 + y = 4
y = 4 - 5
y = -1 <==

so ur other endpoints are (2,-1)
8 0
3 years ago
Solve -2 = 5p + 3p -8 – 6p
Shalnov [3]

Answer:

P=3

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

−2=5p+3p−8−6p

−2=5p+3p+−8+−6p

−2=(5p+3p+−6p)+(−8)(Combine Like Terms)

−2=2p+−8

−2=2p−8

Step 2: Flip the equation.

2p−8=−2

Step 3: Add 8 to both sides.

2p−8+8=−2+8

2p=6

Step 4: Divide both sides by 2.

2p2=62

p=3

3 0
3 years ago
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