A hat salesman earns a commission of 15% of all hat sales. Yesterday he sold 3 hats for $90 each and 4 hats for $50 each. How much did he earn in
commission yesterday?

Nikolas calculated the volume of the prism. his work is shown below.

Yahir designs bracelets. he uses between 9 and 15 red and yellow beads in the ratio of 2 red bead to 5 yellow beads. drag the beads into the container to meet these requirements

Acollection of nickels and quarters is worth $2.85. there are 3 more nickels than quarters.how many nickels and quarters are there?