Question

Study the equation.

W = r-47/-4
If w=8, what is the value of r?
A. 4
B. 15
C. 39
D. 79

Answer 1

Using the given equation W = (r-47)/-4 and substituting w=8, we perform algebraic steps to solve for r, finding that r equals 15.

To find the value of r when w=8 using the equation W = (r-47)/-4, we perform the following steps:

1. First, substitute w=8 into the equation, giving us 8 = (r-47)/-4.
2. Multiply both sides by -4 to isolate r on one side, leading to -32 = r - 47.
3. Add 47 to both sides to find the value of r, which is r = 15.

Thus, the correct answer is: r equals 15, which makes option B the correct choice.

In conclusion, by using simple algebraic manipulation, we can determine that the solution for r when w=8 is 15.