John is five years older than his sister. the product of their present ages is 150.
john's present age is (blank) years, and this sister's present age is (blank) years
so i believe you have to answer this with the quadratic formula but i'm not sure.

Which representation has a constant of variation of -2.5

Find the area of the triangle shown 3 by 6

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.