Answer:

Step-by-step explanation:
We have been given that A girl has a square pool with an area of 81 square feet.
Let us find find the each side length of pool by taking square root of 81 as:


We have been given that girl adds a patio which is 3 feet wide around the pool, so each side of pool after adding patio will increase by 6 feet.
So new sides of pool would be 
The total area of the pool and patio would be product of each side.


Therefore, the total area of the pool and patio combined would be 225 square ft.
9y+7=2y+98
9y-2y=98-7
7y=91 /:7
y=13
(9y+7)°=(9·13+7)°=(117+7)°=124°
The sister is 4<em>n</em><em> </em>yrs old.
That is because 4 times <em>n</em><em> </em>is 4<em>n</em><em>.</em>
Answer:
Reduce
Step-by-step explanation:
It will reduce because the factor is less than 1 so it cannot enlarge and it is not the same as the 1 so it cannot preserve.
The answer is A because you are multiplying it by 2