What is an algebraic expression using x and y that has a value of 20 when x=2 and y= -6

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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.]

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll