Answer:
a. 16 square inches
Step-by-step explanation:
Given that each covering is 15 windows long you need to calculate how many times is 15 in 50, to know how many coverings are necessary to cover the 50 windows.
The operation is a simple division: 50 ÷ 15 gives the number of times that 15 is contained in 50.
The result is 50÷15 = 3.33.
So, you need more than 3 coverings, and so take the next whole number, i.e. 4.
Answer: 4
First question answer: August and September
Second question answer: July
Answer:
2a +2b +4
Step-by-step explanation:
The perimeter is the sum of the lengths of the three sides. If x represents the length of the third side, then ...
(3a +8) +(5a +b) +x = (10a +3b +12)
Subtracting from the equation everything on the left side that is not x, we get ...
x = (10a +3b +12) -(3a +8) -(5a +b)
= a(10 -3 -5) +b(3 -1) +(12 -8)
= 2a +2b +4
The length of the third side is 2a +2b +4.