Find the critical value Za/2 that corresponds to the confidence level 81%. (Round to two decimal places as needed)

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3