Answer:
Explanation:
1260 = (n - 2)180
1260/180 = n - 2
7 = n - 2
7 + 2 = n
9 = n
Therefore, n = 9
28ft, 4ftx10ft. 2 4ft edges and 2 10ft edges. (2x4) + (2x10)= 28 ft
First add the seconds you have 45 +5+10 seconds which equals 60 seconds or 1 minutes. Now add the minutes 9 + 7 + 12 minutes = 28 minutes then add that 1 minutes that you got from the seconds 28 + 1 minute = 29 minutes 7:40 + 20 minutes = 8:00 + 9 minutes = 8:09 am. So Marsha arrived to school at 8:09 am. Comment if you have any questions.
Length is 4
Width is 5
Hope this helps