Answer:
3 gallons
Step-by-step explanation:
Let
x ----> the amount of pure acid (100% solution) in gallons
Remember that



we know that

solve for x


therefore
3 gallons of pure acid should be mixed with 3 gallons of a 20% acid solution in order to get a 60% acid solution
Answer:
60
Step-by-step explanation:
Look at the attachment
Answer:
x=4
Step-by-step explanation:
If you plug this in, you get 3(4-2)2=12. Simplify to 3 times 2 times 2, which equals 12. Stay Safe and Have a Magnificent Day!!!!!!;):)
The answer is
B) 2n - 5
because it's -5 than twice the width (2n)
They hiked more on the 2nd day because they are retracing their steps.