What is the included angle for sides XY and XZ?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

For what type of equity loan are you lent a lump sum, which is to be paid within a certain period of time? a. a line of credit b. equity c. a second mortgage d. an amortization

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k