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konstantin123 [22]
3 years ago
10

The rectangle shown has a perimeter of 54 cm and the given area. Its length is 3 more than 3 times its width. Write and solve a

system of equations to find the dimensions of the rectangle.
The length of the rectangle is what cm ?
the width of the rectangle is
what cm.?
Mathematics
1 answer:
algol133 years ago
5 0

Answer:

Step-by-step explanation:

the perimeter P=2(L+W)=54

P=2L+2W=54 OR L+W=27

we know that L=3W+3

P=3W+W=27-3

4W=24

W=6 CM

L=21CM

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Americans who are 65 years of age or older make up 12.9% of the total population. If there at 30.3 million american in this age
telo118 [61]

Total population of US is 234.88 million.

Step-by-step explanation:

Given,

Number of people are 65 or older = 30.3 million

This represents 12.9% of total population.

Let,

x represent the total population.

12.9% of x = 30.3 million

\frac{12.9}{100}x=30.3\ million\\0.129x=30.3\ million

Dividing both sides by 0.129x

\frac{0.129x}{0.129}=\frac{30.3}{0.129}\ million\\\\x=234.88\ million

Total population of US is 234.88 million.

Keywords: percentage, division

Learn more about percentage at:

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3 years ago
Find the constant of variation k for the direct variation ​
Alla [95]

Answer:

The constant of variation is k = -2 ⇒ (B)

Step-by-step explanation:

The equation of the direct variation is y = k x, where

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The given table has 4 points (-1, 2), (0, 0), (2, -4), (5, -10)

We can use one of the points <em>[except point (0, 0)]</em> to find the value of k

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→ Substitute the values of x and y in the relation above

∴ k = \frac{2}{-1}

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The constant of variation is k = -2

7 0
3 years ago
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Mnenie [13.5K]

Answer:

c) x= 15

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solve it like usually

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8 0
3 years ago
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Nesterboy [21]
Given:
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