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rusak2 [61]
3 years ago
5

PLEASE HELP. Solve for x

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

Answer:

x=8

Step-by-step explanation:

set up a proportion:

\frac{20}{4}=\frac{4x-7}{5}

simplify:

5 =\frac{4x-7}{5}

now solve this equation for x:

5 = \frac{4x-7}{5} \\25 = 4x - 7\\32 = 4x\\x = 8

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nikdorinn [45]

This is the diference of 2 perfect squares. 4 is a perfect square, x^2 is a perfect square, and 25 is a perfect square. The pattern for this is (ax + b)(ax - b). Our a is 2 since 2*2 = 4, and our b is 5 since 5*5 = 25. So your factors are (2a+5)(2a-5), choice C.

3 0
3 years ago
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Answer:

Dimensions of the rectangular plot will be 500 ft by 750 ft.

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Total cost to fence all sides of rectangular plot = 2(3x + 2y)

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3 years ago
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Answer:

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