Me i need number 8 and 9 show work and !

If f(x) = 2x - 6 and g(x) = 3x + 9, find (f - g)(x). a. (f-g)(x) = x + 15 o o b. (f- g)(x) = -x - 15 o c. (f- g)(x) = 5x + 3 o d. (f- g)(x) = -x+3 submit

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Solve 2^x=32 and rewrite this equation in a logarithmic form