the liner function f(x) =0.9x + 7p represents the average test score in your math class where x is the number of tests taken. the liner function g(x) represents the class average test score in your class, where x is the number of tests taken

the liner function f(x) =0.9x + 7p represents the average test score in your math class where x is the number of tests taken. the liner function g(x) represents the class average test score in your class, where x is the number of tests taken​

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13