There is a water tank behind a school. The school uses 4 9/10 gallons from the tank. There are more than 11 4/5 gallons left in the tank. Estimate the number of gallons in the tank before the school used the 4 9/10 gallons, and then find the exact solutions. Which of the following is the best estimate for how many gallons were in the​ tank? Select the correct choice below and fill in the answer box to complete your choice. A. There were approximately nothing gallons in the water tank. B. There were less than nothing gallons in the water tank. C. There were more than nothing gallons in the water tank.

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours