Answer:
StartFraction h (3) minus h (0) Over 3 EndFraction
h(3)-h(0)/3
Step-by-step explanation:
81 x 31 = 2 511 (area of a brick)
2511 x 400 = 1 004 400 (area of the wall)
Convert 1 004 400" to ft. [1ft. = 12"]
1 004 400 / 12 = 83 700 ft.
Now this is what we have.
-Hight 42 ft.
-Length X ft.
-Area 83 700ft.
Algebra time.
42 x X = 83 700 (to get X you would devide 83 700 by 42)
83 700 / 42 = 1 992.85ft. (X = 1 992.85ft.)
So the length of the wall would be 1992.85ft.
-8+y=-3y-2
-8+2=3y-y
-6=2y
y=-3
Answer:
20 pages
Step-by-step explanation:
2 minutes is 1/2 of 4 minutes.
By proportion number of pages he scans in 2 minutes = 1/2 * 40
= 20 pages