Question

Find the value of the expression 2x - 7 for x = -1, x = 7, and x = -6.

If x = -1, then 2x - 7 =
a) -9
If x = 7, then 2x - 7 =
b) 7
If x = -6, then 2x - 7 =
c) -19

Answer 1

The expression 2x - 7 evaluates to -9 when x = -1, to 7 when x = 7, and to -19 when x = -6, by substituting the given values and simplifying.

Step-by-step explanation:

The student is asking to evaluate the expression 2x - 7 for different values of x. Let's solve each one step by step.

• For x = -1 :
  2x - 7 = 2(-1) - 7 = -2 - 7 = -9
• For x = 7 :
  2x - 7 = 2(7) - 7 = 14 - 7 = 7
• For x = -6 :
  2x - 7 = 2(-6) - 7 = -12 - 7 = -19

By substituting the given values of x into the expression 2x - 7, we find the respective results for each case.