For what value of x is the rational expression below equal to zero 2-x/2+x

What is the rescursive formula for this geometric sequence? 7, -14, 28, -56

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

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.]