A car drives 450 mi in 10 h.

How fast is the car going
(write the answer as mph)

45 mph

Speed =distance ÷ time

X=450÷10

X=45

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.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13