A video games on sale for $56. The original price of the video game was $70. What percent of the original price is the sale price?

Using elimination, what is -4x+2y=-12 4x+8y=-24

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)