Solve for x in the equation

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.

What expression is equivalent to 42x-56y

Find the midpoint m of z1=(8+5i) and z2=(12+3i)