Whole numbers greater than 10 but smaller than 30

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.

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

Yvaries directly as x. y =90 when x=6. find y when x=13