X= - 7/2
Hope this helps! :)
You would plug in the y=9 into the first equation and then have the expression 9=9x-9
. After going through the first steps of solving an expression you would get 18=9x. X=2. Then you would plug in the x value into the first expression to get y=9.
Answer: A
Step-by-step explanation:
X=(2±√4-12)/2
X=(2±2i√2)/2
x1=1+i√2
x2=1-i√2
by dy/dx, we'll be assuming that "y" is encapsulating a function, a function in terms of "x".

100% = 50
10% = 5
5% = 2.5
15% = 7.5
50 - 7.5 = $42.50