A positive number is multiplied by itself and then 7 is added. The answer is 16. What is the number?

Mathematics

1 answer:

Alika [10]4 years ago

5 0

Answer:

Step-by-step explanation:

let the number be n then multiplied by itself gives n², thus

n² + 7 = 16 ( subtract 7 from both sides )

n² = 9 ( take the square root of both sides )

n = $\sqrt{9}$ = 3

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How to solve this problem

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Step One
Solve for y
Cos(A) = adjacent / hypotenuse
Cos(A) = y / 8
y = 8 * cos(A)
y = 8 * cos(73)
y = 8 * 0.2924
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Step Two
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