Question

What is the value of h(-7)?

h(x) = [3x] - 1

A. 22
B. -20
C. -22
D. 20

Answer 1

For this case we have to find the value of
`h (x)`when
`x = -7`, for this we must replace the value of
`x = -7` in the given equation. We have:

`h (x) = | 3x | - 1`

Substituting
`x = -7`

`h (-7) = | 3 (-7) | - 1`

Considering what
`+ * - = -`

`h (-7) = | -21 | -1`

Taking into account that by definition;
`| -a | = a`

`h (-7) = 21-1\\h (-7) = 20`

So,
`h (-7) = 20`

Answer:

Option D

Answer 2

substitute -7 in for x

f(-7) = (3*-7) -1

= -21-1

= -22

Choice C