Which of the following is a composite number? 48 67 13 31

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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 f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)