Pencils cost 25 cents apiece. Rulers cost 80 cents apiece. Susan spent $20 for a total of 36 rulers and
pencils. How many pencils did she buy?

Which number line correctly shows 0.8 + 0.3?

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

Which expression gives the exact value of x?