Y = 15x - 40
when x = 3 function and solution??

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)