F(x)=2×-a/x-b a and b is real number and not = 0 f'(0)=4 and f"(0)=-8 find f(0)
the picture is thai language.

Factor the expression using gcf 9b+45

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.