if only i knew I would love to help you sorry
You will need to draw the shape of the circular pool and measure it until you reach the 50ft
To solve, you must make one side of the equation equal to zero. We can do this by subtracting 3x on both sides of the equation.
<span>x^2 + 7x = 3x
</span> - 3x -3x
x^2 + 4x = 0.
Then we substitute the equation into the quadratic equation.

Where a = 1 b = 4 and c = 0

We first solve whats inside the square root.


Now we solve for -4 and 4.


Then divide both answer by 2

The division of any by zero is zero
So the answer are x = -4 and x = 0
Hi
312 bolts ⇒ 30 min
260 bolts ⇒ x min
312x = 30·(260)
312x = 7800
x = 7800/312
x = 25 min
Answer: 25 minutes