In the equation 4x2-5x=21, what is the value of b? 4 -5 -21

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *