Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 6 more than 2 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 78?

Determine the fraction of total interest owed. after the fourth month of a 12-month loan: the numerator is: {(n + ) + (n + ) + (n + ) + (n + )} = , and the denominator is: {(n) + (n + 1) + + (n + )} = . therefore, the fraction is numerator/denominator (to the nearest tenth) =

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i