15-2 6. What is the value of the expression "eight more than three times the difference of four and a number' when
n = 3? (LEVEL 4)

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

What is the missing value in the proportion 4/5 = x/30

For which of these functions is function composition commutative with ƒ(x) = (x + 1 /3x − 2) ? a - g(x) = (3x − 2/x + 1)b - g(x) = (3x − 3/x + 2)c - g(x) = (2x + 1/3x − 1)d - g(x) = (2x − 1/3x + 1)