David has 18 coins in nickels, dimes and quarters the total value is $2.80 the number of nickels is one more than three times the number of dimes how many quarters does David have

What is the measure of ac? 5 units 13 units 26 units 39 units

With this one. will mark brainliest

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain