Laura cut a piece of string.
she cut off a piece that is
19 inches long and used it
for a necklace. now she
has a piece of string that is
only 13 inches long. how
long was the string to
begin with?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent. the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244

Factor the polynomial by its greatest common monomial factor.