Question

Select the correct answer.

Identify the expression equivalent to 4(x + x + 7) - 2x + 8 - 4 by substituting x = 1 and x = 2.
PLZ HELP

Answer 1

Option (C)

Explanation:

Given expression is 4(x + x + 7) - 2x + 8 - 4

When x = 1,

Value of the expression will be,

= 4(1 + 1 + 7) - 2(1) + 8 - 4

= 4(9) - 2 + 8 - 4

= 36 - 2 + 8 - 4

= 38

For x = 2,

= 4(2 + 2 + 7) -2(2) + 8 - 4

= 44 - 4 + 8 - 4

= 44

Now we will check the same for the given options.

Option (A). For x = 1,

6x + 11 = 6(1) + 11

= 17

For x = 2,

6x + 11 = 6(2) + 11

= 23

Option (B). For x = 1,

3(x + 7) = 3(1 + 7)

= 24

For x = 2,

3(x + 7) = 2(2 + 7)

= 18

Option (C), x = 1

2(3x + 16) = 2[3(1) + 16]

= 38

For x = 2,

2(3x + 16) = 2[3(2) + 16]

= 44

Option (D), For x = 1,

= 19

For x = 2,

2(3x + 16) = 2[3(2) + 16]

= 44

Since value of the expression for x = 1 and 2 matches with the value in option (C)

Therefore, Option (C) will be the answer.