Let P = {4, 5, 6, 7, 8}, Q = {5, 6, 7}, and R = {1, 2}. Find upper P union upper Q.
A. {1, 2, 4, 5, 6, 7, 8}
B. {5, 6, 7}
C. {4, 5, 6, 7, 8}
D. empty set

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.