Riki cuts two decagons out of cardboard. Then he glues yarn around theedges. How much yard does riki use if each edge of the decagon is 8 centimeter?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

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?