Y= (2x(x+3)) / (x-1)

the x intercept is supposedly -0.5 how do I get this answer?

Evaluate the following expression 1/3^2

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.

Simplify the expression. -2/5(10+15m-20n)