What is the perimeter of a rectangle if the length of the short sides are 5", and the other sides are both y?

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1