A teacher asked has three students, Tom, Helen and Sandy to complete 200 exercises. The ratio of the exercises completed by Tom to the exercises completed by Helen to the exercises completed by Sandy is 3:3:4. Tom receives 8points for each exercise. If the three students altogether receive 1240 points, how many points does Helen receive for a completed exercise?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

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) .