Tommy works as an electrician. He charges $40.00 flat fee a service call and $32.50 for each hour of labor. Tommy was paid $170.00 for his last job. How many hours did Tommy work on his last job?

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

m a t h w a y. c o m

step-by-step explanation:

99

step-by-step explanation:

y=mx+