Answer:
b
Step-by-step explanation:
600-230=L
L means Left or What's left
.
The given function is .
We want to find a rule for .
Let .
Interchange x and y.
Solve for y.
Expand
Group y-terms
Factor
right and -1
18² - 4 * 3 * 7 =240
x1 = (-b-root of 240)/2a = ............
x2 =(-b + root of 240)/2a = ........