The roots of the equation 2x2 - 8x = 0 are
(1) -2 and 2 (3) 0 and -4
(2) 0, -2, and 2 (4) 0 and 4

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?

Each unit cost 14p, how much would 942 units cost?