Answer:
12
Step-by-step explanation:
(×-8)5=20
(5×-40)=20
5×(-40+40)=(20+40)
5×=60
5×÷5=60÷5
×=12
Answer:

Step-by-step explanation:
a = 3, b = 5, c = 1
plug into quadratic formula
Answer:
The number of protons is the answer
The independent variable (the one they want) is the # of hours worked, since that determines the price.
All the other answers contain information not included in the problem