Question(1)
f(x)=-3x+10
Question (2)
f(x)=X square roof +5x-1

To find the indicated value of a function you replace the 'x' in the equation with the value that you are interested in. For example: if f(x) = 3x-7, then f(10) = 3(10)-7 = 23. You didn't say what the values for x are that you are evaluating, but I assume the original problem statement has them. Use this technique to evaluate the functions you were given, and post back with what you get for answers.