Answer:
Please see the attached file for the complete answer.
Step-by-step explanation:
To Find :
How many gallons of a 80% antifreeze solution must be mixed with 100 gallons of 20% antifreeze to get a mixture that is 70% antifreeze.
Solution :
Let, x gallons of 80% antifreeze solution is required :
So,

Therefore, 500 gallons of 80% antifreeze solution is required.
Answer:
B(2,3),C(2,-3)
Step-by-step explanation:
On y-axis symmetry有手就行