Help please:)

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1