Diana buys 7 cups of orange juice. Each cup of orange juice cost $0.81. How much does diana spend? help pls

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

An angle that measures between 90 and 180° is called a(,

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?