X - (-3) is the same as x + (-3).

True or False

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

One positive number is 9 more than twice another. if their product is 95, find the numbers

2x minus y equals 6, x plus y equals negative 3