Jenna is 16 years old. this is 9 years younger than her sister, barbara. how old is barbara?
write and solve an equation for each situation.

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

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

Three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder ( ! : ”0 )