Final answer:
When evaluating the function f(x) = 5x - 8 for x = -3.0, the result is -23. If x = 4, the result is 12. Thus, the function yields these specific values for each respective substitution.
Step-by-step explanation:
To evaluate the given function f(x) = 5x - 8 for a certain value of x, simply substitute the value of x into the equation and perform the arithmetic operations. Let's do this for the value x = -3.0.
Substitute x = -3.0 into the equation:
f(-3.0) = 5(-3.0) - 8
Now perform the multiplication:
f(-3.0) = -15 - 8
And then the subtraction:
f(-3.0) = -23
So, the value of the function when x = -3.0 is -23.
If the given value of x was a typo and it should be x = 4, then:
f(4) = 5(4) - 8
f(4) = 20 - 8
f(4) = 12.
Therefore, the function values for x = -3.0 and x = 4 are -23 and 12, respectively.