Question

Evaluate 3|2x−9|+7 when x=−34. Enter your answer as a decimal in the box.

Answer 1

238

Explanation:

the absolute value function always gives a positive value, that is

| - a | = | a | = a

given

3 | 2x - 9 | + 7 ( substitute x = - 34 )

= 3 | 2(- 34) - 9 | + 7

= 3 | - 68 - 9 | + 7

= 3 | - 77 | + 7

= 3 | 77 | + 7

= 3 × 77 + 7

= 231 + 7

= 238