The answer is C. y= 3/2 x. You can check by multiplying 3/2 by 3, if you get 7, it is correct
The answer is either
or 
To solve: Let's solve your equation step-by-step.
5x2+5x−x2−x=2004
Step 1: Simplify both sides of the equation.
4x2+4x=2004
Step 2: Subtract 2004 from both sides.
4x2+4x−2004=2004−2004
4x2+4x−2004=0
Step 3: Use quadratic formula with a=4, b=4, c=-2004.
x=
−b±√b2−4ac
/2a
x=
−4±√32080
/8
or 
<span>40.19 + 2.06x
I think its the right one, not sure though
Hope this helped</span>
2556.6975 days
Your answer would be
Nina would have ran 5 miles because if clara ran 10 and thats twice as far as nina 10 divided by 2 is 5