David ran 3/4 of a mile every day for 7 days. How many miles did David run after seven days?

5.25 miles

Step-by-step explanation:

All you do is multiply 3/4 times 7 and it gives you the amount of miles that was ran in that week

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.

51-50

step-by-step explanation: