Amusic shop charges a deposit of $20, plus a monthly rate of $30 to rent an instrument. for how many months did avi rent an instrument. for how many months did avi rent an instrument if he spent a total of $80
a) 2 months
b) 3 months
c) 4 months
d) 5 months

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 graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.