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aivan3 [116]
3 years ago
15

The triangle and square have equal perimeters. What is the perimeter of the triangle?

Mathematics
1 answer:
Bezzdna [24]3 years ago
6 0

Answer:

E. 16

Step-by-step explanation:

Perimeter of the triangle = 4x+4x+(x+7)

Perimeter of square = 4(x+3)

We know that the perimeters are equal so we can form an equation to solve for x:

9x+7 = 4x + 12

Now we can subtract 4x from both sides to move the xs to the left side, and the same with the 7 so we have the variable on one side and the constant on the other:

9x+7-7-4x=12+4x-4x-7

5x = 5

Now we divide both sides by 5 to get:

5x/5 = 5/5

x = 1

Now we can use this value to figure out the perimeter of the triangle:

P = 9x + 7

x=1, substitute into equation:

P = 9(1) + 7

P = 16

Hope this helped!

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Bezzdna [24]
To find percent error you use the following formula:
% Error =  \frac{final value - given value}{given value}
% error = (1.6 - 1.9)/1.9 * 100% = 15.79%
5 0
3 years ago
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BabaBlast [244]

Answer:

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Step-by-step explanation:

3 0
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nataly862011 [7]

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Steps:

5x+34=-2+14x
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3 years ago
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devlian [24]
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4 0
3 years ago
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tino4ka555 [31]

Answer:

C: 8.00

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l = 8.00 in

The length of Nancy’s mirror is 8.00 in.

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