Well, it would end up taking Sandy 3 minutes to run the race and Chris 2 and a half minutes. Meaning Sandy crossed the Dubinsky line 30 seconds after Chris.
All you need to do is pull out the common factor of

:
I used the quadratic formula and got x= 4, -6
Answer:
15.75 cups
Step-by-step explanation:
If she uses 1.75 cups each batch to find how much she uses for 9 batches you just multiply 1.75 by 9 which gives you 15.75 cups