Question

Evaluate the expression when x = 9:

10 |7 - x|

A. -160

B. -20

C. 20

D. 160

Answer 1

C

Explanation:

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

| - a | = | a | = a

substitute x = 9 into the expression

10 | 7 - 9 |

= 10 | - 2 |

= 10 | 2 |

= 10 × 2

= 20