The shoe store has a mark up rate 75% and is selling a pair of shoes for $133 find the price the store paid for the shoes

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.

(-1,-0.5)

step-by-step explanation:

the answer is d

step-by-step explanation:

you can also use mathway to get you answer + steps