Answer:
[tex]f(7) = -22 \\[/tex]
Step-by-step explanation:
Whenever there is a question asking to find something like f(7), it is asking you to substitute the number within those parentheses for the matching variable within the function.
To find f(7), first substitute 7 for all the x's within the function. Then, following PEMDAS, simplify like how you normally would. Multiply out [tex]-2^2[/tex], then multiply 3 by 7, then add all the numbers together.
[tex]\\f(7) = -2^2-3(7)+3\\f(7) = -4 - 21 + 3\\f(7) = -25 + 3\\f(7) = -22[/tex]
Thus, [tex]f(7) = -22 \\[/tex].
