Solve the Problem $f ( x ) = - x - 7$

Multiple Choice

Solve the problem.
-Suppose that $f ( x ) = - x - 7$ and $g ( x ) = x - 18$ .
(a) Solve $f ( x ) > 0$ .
(b) Solve $g ( x ) > 0$ .
(c) Solve $\mathrm { f } ( \mathrm { x } ) \leq \mathrm { g } ( \mathrm { x } )$ .

A) (a) $x < - 7$ ;(b) $x < - 18$ ; (c) $x \leq 5.5$

B) $( a ) x > 7$ ;(b) $x > 18$ ;(c) $x > 5.5$

C) (a) $x < - 7$ ; (b) $x > 18$ ; (c) $x \geq 5.5$

D) (a) $x < - 7$ ;(b) $x < 18$ ;(c) $x \geq - 12.5$