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4 years ago

How do I find a perimeter

2 answers:

8 0

The perimeter is the total distance around the sides of a 2 dimensional shape. To calculate a perimeter, add up all the side lengths around the shape

Example:

2 by 5 rectangle

2 of the sides are 2 long

2 of the sides are 5 long

Add up the measures:

2 + 2 + 5 + 5 = 14

perimeter is 14

german4 years ago

5 0

By adding all of the numbers on the the outside lines

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Can you help me pplsssssssssssss

kow [346]

Answer:The answer is A

Step-by-step explanation:

7 0

3 years ago

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What is ?l4 as a mixed number?

PSYCHO15rus [73]

Answer:

It's a whole number. It cannot be a mixed number. Anyways I would have to know the denominator.

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3 years ago

Find the surface area of composite figure. use 3.14 for π. round to the nearest tenth

777dan777 [17]

Answer:

334 in^2.

Step-by-step explanation:

The surface area = area of the top prism + area of the bottom - 2 * area of the base of the top smaller prism

= 2(5*3 + 5*3 + 3*3) + 2(9*7 + 9*5 + 7*5) - 2* 3*5

= 2* 39 + 2*143 - 30

= 334

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2 years ago

What is the area of the following circle of the radius is 4=r

maria [59]

Answer:

50.24 (unit squared! cm2, m2, etc.)

Step-by-step explanation:

Area is: Pi x r^2

3.14 x 4^2 = 3.14 x 16 = 50.24

8 0

3 years ago

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Riley and Erik have earned a total of 135 tokens to buy items in the school store. The ratio of the number of tokens that Riley

lisabon 2012 [21]

Answer:

<em>Riley has 72 tokens</em>

Step-by-step explanation:

<u>System of Equations </u>

We have two conditions for the tokens Riley and Erik have earned. Let's call x and y to the number of tokens of Riley and Erik respectively. The first condition states that

$x+y=135$

Solving for y

$y=135-x$

The second condition is that the ratio of the number of tokens that Riley had to the number of tokens that Erik has is 8 to 7. It's written as

$\displaystyle \frac{x}{y}=\frac{8}{7}$

Or equivalently

$7x=8y$

Replacing y from the first equation

$7x=8(135-x)$

Operating

$7x=1080-8x$

Simplifying

$15x=1080$

$\boxed{x=72}$

Riley has 72 tokens

3 0

3 years ago