Tom saves $5 each month. at this rate, how many months will he need to save $20?
a. 4 months
b. 15 months
c. 3 months
d. 5 months

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.

Which expression is the factorization of x^2+10+21

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?