Which sets are closed under subtraction? Select all that apply. {..., −3, −2, −1, 0, 1, 2, 3, ...}

{1, 2, 3, 4, ...}

{1, 3, 5, 7, 9, ...}

{rational numbers}

Sara bought a pair of pants that were on sale for 30 percent off of the original price. if the original price of the pants was $29, what was the sales price of the pants?

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t