So remember that area of a rectangle is a = bh. In this case, our sides are 2 and n - 3 (three less than unknown number) and our area is 22. Using our info, we can form the equation: 
. From here we can solve for n.
Firstly, foil 2(n-3): 
Next, add 6 on both sides of the equation: 
Next, divide both sides of the equation and your answer will be 14 = n. In context, the value of the unknown number is 14 in.
The population will be of 92 million
Answer:
The computer will be worth $1,850 after four years.
Step-by-step explanation:
We need to find 6.5% of $2,500.
2,500 x 0.065 = $162.50
Therefore, the computer value <em>decreases</em> by $162.50 <u>each year</u>. Since we need to know the computer value after <u>4 years</u>, we also need to<em> multiply </em>the value of decrease by 4.
162.5 x 4 = $650
Therefore, after 4 years, the computer value <em><u>will decrease</u></em> by $650.
To find the <em>whole</em> computer value after 4 years, we need to <em>subtract</em> the initial value of $2,500 by the 4-year decreasing value of $650.
2,500 - 650 = $1850
Therefore, the computer will be worth $1,850 after four years.
Hope this helps! :D
If all the flushes were full flushes: 1190 + 3150 = 4340 full flushes in total. Because the full flush uses 1.6 gallons, multiply 4340 and you get 6944 gallons of water used per week before the partial flushes were installed.
(1190 full flushes * 1.6 gallons) + (3150 partial flushes * 0.9 gallons) = 4739 gallons used.
Subtract 4739 gallons from 6944 gallons to get the amount of gallons saved for the week, which is 2205 gallons.
