Use substitution to solve the system.
x = 3y + 8
3x + 5y = 10

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

What is the size of the matrix resulting from

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?