If you would like to know the value of b^2 - 4 * a * c, you can calculate this using the following steps:
x * (x + 8) = 9
x^2 + 8x - 9 = 0
ax^2 + bx + c = 0
a = 1
b = 8
c = - 9
D = <span>b^2 - 4 * a * c = 8^2 - 4 * 1 * (-9) = 64 + 4 * 9 = 64 + 36 = 100
The correct result would be 100.</span>
4w+5+33=90
4w=90-5-33
4w=52
w=13
The flow rate of the water in gallons per minute is 2.5
-45 x -43 = ~34
ThTs my answer I hope it’s correct
B because the other 3 graphs don’t fit the equation
