In the fifth grade at lenox elementary school , there are 4/5 as many students who do not wear glasses as those who do wear glasses. if there are 60 students who wear glasses, how many students are in 5th grade?

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 is the product of the radical expression. (7-2square root) (8+2 square root)

Answer each of the questions for the following diagram: 1. what type of angles are these? 2. solve for x. what does x equal? 3. what is the measure of the angles?