Answer:
-66
Step-by-step explanation:
We have the expression f(x-3) = 7x + 4, in which for x the value is -7.
To solve first substitute x next to f(x).
f((-7) - 3) = 7x + 4
(-7) - 3
f(-10) = 7x + 4
Now that we know x is equal to -10, you may substitute to the actual equation.
f(-10) = 7(-10) + 4
f(-10) = -70 + 4
f(-10) = -66
9514 1404 393
Answer:
-24
Step-by-step explanation:
We want to evaluate the function when ...
x -3 = -7
x = -4 . . . . . add 3
Then, ...
f(-7) = f(-4-3) = 7(-4) +4
f(-7) = -24
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Alternatively, we can rewrite the function to be f(x).
f(x) = f((x+3) -3) = 7(x +3) +4
f(x) = 7x +25
Now, f(-7) is ...
f(-7) = 7(-7) +25 = -49 +25
f(-7) = -24
