How do we get 9 from five fives? 5 5 5 5 5 =9?

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

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

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83