What is "if a(x) = 3x + 1 and?

b(x) = 2x - 4, then find a(4) + b(-2)."

The given problem involves two functions: a(x) = 3x + 1 and b(x) = 2x - 4.

To find a(4), we simply substitute 4 for x in the expression for a(x):

a(4) = 3(4) + 1 = 12 + 1 = 13

Next, to find b(-2), we substitute -2 for x in the expression for b(x):

b(-2) = 2(-2) - 4 = -4 - 4 = -8

Finally, we add the two values we found:

a(4) + b(-2) = 13 + (-8) = 5

Therefore, the final answer is 5.