Peter has half of his investment in stock paying 6% divided and the other half in a stock paying 11% interest. If his total annual interest is $510 how much does he have invested?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

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? )

Acircle has a circumference of 7.850 units. what is its radius?