Help please this is trig ratios

Which statements are true about additional information for proving that the triangles are congruent check all that apply

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

Simplify the expression below -3(10x+4y)+6(6x-2y)