Answer theses and show the work
factor each completely
1.-2m^2-18
example of what you have to do for the following 3
6x^2-12x-48
divide all by 6
6(x^2-2x-8
list factors of 8
8,1
4,2
(x+4) (x-2)

2.-7a^2+50a+7
3.-3x^2+11x-20
4.-x^2+7x-18

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad