Solve the Problem $\mathrm { f }$ And $g$ Are Continuous and That

Solve the problem.
-Suppose that $\mathrm { f }$ and $g$ are continuous and that $\int _ { 5 } ^ { 9 } \mathrm { f } ( \mathrm { x } ) \mathrm { dx } = - 3$ and $\int _ { 5 } ^ { 9 } \mathrm {~g} ( \mathrm { x } ) \mathrm { dx } = 7$ . Find $\int _ { 5 } ^ { 9 } [ f ( x ) - 5 g ( x ) ] d x$ .

A) $- 38$
B) 32
C) $- 50$
D) $- 10$