Hal is tossing a quarter. What is the probability he will toss heads and then tails?

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?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48