The histogram shows the ages of people in a community chorus.

how many people in the chorus are under 40?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

Can someone me with this problem i don't understand i need