Write an Expression that Represents the Perimeter of the Rectangle.

2(3x^2+3x+1)

Step-by-step explanation:

(6x^2) + (6x + 1)

Step-by-step explanation:

We know perimeter is the sum of all sides of an object, so in this case, we can write it like this:

3x + 1 +3x + 1 + 3x^2 + 3x^2

Now we simplify:

2(3x+1) + 2(3x^2)

(6x^2) + (6x + 1)

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

answer: y=4000x+14000

step-by-step explanation: