What is the midpoint to D (1, 4) and F (7, 1)

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Alice is paying her bill at a restaurant. but tax on the cost of a male is 5%. she decides to leave a tip 20% of the cost of the meal plus the tax