Give an example of a situatior that has a quantity that varies and a quantity that stays constant Really need to know

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Naomi’s parents want to have 50,000, saved for her college education, if they invest 20000 today and earn 7% interest compound annually, about how long will it take them to save 50 thousand

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}