Please help due today Prove the sum of two rational numbers is rational where a, b, c, and d are integers and b and d cannot be zero.

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

The tile along the edge of a triangular community pool needs to be replaced? ?

Which term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value