a local hamburger shop sold a combined total of 641 hamburgers and cheeseburgers on sunday. there were 59 fewer cheseburgers sold than hamburgers. how many hamburgers were sold on sunday?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

What is the slope of the line shown below?