A rectangular prism is made up of 60 unit cubes. The base of the prism is 15 unit cubes. How many layers of 15 unit cubes does the rectangular prism have?

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]