Evaluate the expression when c=4. c2 +6c+8 (the 2 after the c is one of those mini high 2's.)

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?