In Mrs. Tiannas classroom this year her 23 students 115 crayons. Last year her students only broke 90 crayons, but there were 18 students. Is this a proportional amount of broken crayons?

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.