This is writing an expression for the perimeter! explain how you got your answer.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Asphere has a diameter of 10 in. what is the volume of the sphere?

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)