Problem:
The area of the patio of a relative's house is 20 square meters.
The width of the patio is 2 meters.
What is the length of the patio?
Solution:
The area is:
A = (w) * (l)
Where,
w: width
l: long
Clearing l we have:
l = A / w
Substituting values:
l = 20/2
l = 10 meters
Answer: 5.55
Step-by-step explanation:
5550/10^3
10 * 10 * 10 = 1,000
5550/1000 = 5.55
Note: Consider we need to find each type of coins he has.
Given:
Erin has quarters and nickels for a total of 16 coins.
The value of his coins is $2.60.
To find:
The number of each type of coins.
Solution:
Let x represent the number of quarters and y represent the number of nickels.
According to the question,
Total coins :
...(i)
Total value :
...(ii)
Multiply equation (i) by 0.25 and subtract the result from (ii).



Divide both sides by -0.20.

Put y=7 in (i).



Therefore, the number of quarters is 9 and number of nickels is 7.