Answer:
the answer is 14 C
Step-by-step explanation:
just took the test?
It kind of looks like your missing something in you problem. But if f(x) = 3 is correct, then it doesn't matter what x is the answer is always going to be 3. So f(4.5) = 3. Most of the time though f(x) means a function of x, so there is an x in the problem. For example: f(x) = 3x, then f(4.5) = 3*4.5 = 13.5.
Y = 7(15 + x) Use the Distributive Property
Y = 105 + x Subtract 105 from both sides
Y - 105 = x Switch the sides to make it easier to read
x = Y - 105