Carol plans to sell twice as many magazine subscriptions as jennifer. if carol and jennifer need to sell at least 90 subscriptions in all, which inequality could be used to determine how many subscriptions, x, jennifer needs to sell?
1) x ≥ 45
2) 2x ≥ 90
3) 2x – x ≥ 90
4) 2x + x ≥ 90

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) .

What can you determine about the solutions of this system

How are sas and sss used to show that two triangles are congruent?