Solve the following equation for x, in terms of a and b. ax = 15 + bx

Find the value of the cosine for angle a

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.

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents