Tom got 15 questions right on a test and scored 75%. How many questions were there total on Tom's test?

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Aefg - almn. find the ratio of aefg to almn. a)1: 4 b)1: 2 c)2.1 d)4: 1