Krutika was thinking of a number. Krutika doubles it, then adds 19 to get an answer of 65. What was the original number?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.

If two parallel lines are cut by a transversal, interior angles on the same side of the transversal are supplementary. a. always b. sometimes c. never