Nico and tony have decided to pay for their own phone plans. nico had to pay $100 to sign up for verizon and is going to be charge an additional $30 each month. tony is going to have to pay sprint $85 as an initial cost and will be charge an additional $40 each month.(use x to represent the number of months and y to represent the total cost)

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

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