Find and explain the mistake if there is any.
Solve for y
-2y+12=18x
-2y=6x
y=-3x

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

Mikes car gets an average of 28 mpg. there are 12 gallons of fuel in mikes car when he starts his trip of 140 miles. about how many gallons are left at the end of his trip?

What is the period of the sinusoidal function ?