Question

If f(x) = 4x + 5, determine the value of f(−3) .

Answer 1

f(-3)= -7

Explanation:

To solve this problem, we want to find out what f(x) or y is, when x is equal to -3.

f(x)=4x+5

Therefore, we can substitute -3 in for x.

f(-3)=4(-3)+5

Now, solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition and Subtraction

Multiply 4 and -3

f(-3)=-12+5

Add -12 and 5

f(-3)= -7

Answer 2

F(x)= -7

Explanation:

f(-3)=4(-3)+5

F(-3)= - 12 + 5

F(x)= -7

Hope this helps