7 added to the product of 3 and -10

Let r = 3. what is the value of r + 58?

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?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.