Answer: Problem 4, missing number is 626, while the missing number for all the other problems is 426.
Step-by-step explanation:
Problem 1. 526= _ + 100 (Ans = 526-100=426)
Problem 2. 526-_=100 (Ans = 526-100=426)
Problem 3. 526-100=_ (Ans = 526-100=426)
Problem 4. 526+100=_ (Ans = 526+100=626)
He needs 13 cans of paint.
The lateral area is given by the area of 5 rectangles, whose dimensions are 15 by 5:
5(15)(5) = 375
Divide this by 30:
375/30 = 12.5 ≈ 13
In order to combine, you have to multiply the top equation by 2
so you get
8g + 10h = 8
8g - 10h = 4
---------------
16g = 12
g = 3/4 --> plug it in to solve for h
8(3/4)-10h = 4
6-10h=4
10h=2
h=1/5
Your result: g=3/4, h=1/5