Question

When evaluating (8x+9)? -5 for x = 1, the given value of 1 is substituted for what part of the expression?

A.the exponent

B. The constant

C. the variable

D.any numerical value

Answer 1

C. the variable

Explanation:

(8x+9) -5 <----- The original question.

(8(1)+9) -5 <----- Replacing the variable.

(8 + 9) -5 <------ Completing the multiplication.

17 - 5 = <----- Doing the addition.

12

x = 1 tells us the "x" or the variable in this equation is a substitute for 1.

Answer 2

C. The variable

Explanation:

The given value states that all values of x will be replaced by 1. The definition of a variable in algebra is a symbol for a number we don't know yet, so x will be the variable in this equation