Question

4. Evaluate the following expression for r= 5.
2(r2 - 8)

Answer 1

The expression is equal to 4

Explanation:

Given the expression 2(r2-8) and the equality for the variable r = 5. It is best to substitute this equality into the expression to solve for its corresponding value:

2(r2-8) =

2(2(r)-8),

2(2(5)-8),

2(10-8),

2(2),

4