Step two shows the step where he applied the distributive property.
This is because he distributed the terms in the first bracket with the terms in the second bracket
Let's say that ground level is 0. When she goes down to the basement, she is going -12 feet since each flight of stairs is12 feet. Then she goes up 12 more feet= -12+12=0. She is back at ground level. Then she goes up another 12 feet= 0+12= 12. So I believe the answer is 12 feet.
9 miles every week + 15 miles every weekend = 24 miles every 7 days =
24/7 = 3 3/7 miles per day
Mx+b=y m is your slope which u can find by using two point see how far the x are and the y are then the y/x is your slope. Then he is your starting value so what y is when x= 0
