Arrange these numbers from least to greatest 2/5 5/7 4/9

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

Which of these choices show a pair of equivalent expressions?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x