Final answer:
By substituting x with 7 in f(x) and -4 in g(x), the calculated values are f(7) = -15 and g(-4) = 60.
Step-by-step explanation:
To find the value of f(7), we substitute x = 7 into the function f(x) = -2x - 1.
f(7) = -2(7) - 1 = -14 - 1 = -15.
Similarly, to find the value of g(-4), we substitute x = -4 into the function g(x) = 3x2 - 3x.
g(-4) = 3(-4)2 - 3(-4) = 3(16) + 12 = 48 + 12 = 60.
Therefore, the correct answers are:
a) f(7) = -15, g(-4) = 60.