What is the standard form equation for this slope intercept equation?

y = -7x + 12

Is every rectangle is a parallelogram? true false

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.

Could somebody me with this radical simplification?