7. In a bag of marbles, the ratio of blue to red marbles is 2:3. Assuming those are the only two colors in the bag, what is the percent of blue marbles in the bag?
The percent of blue marbles in the bag is 50%

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4