Answer: 
Step-by-step explanation:
Let be "x" the original volume of the solution (in milliliters) before the acid was added and "y" the volume of the solution (in milliliters) after the addition of the acid.
Set up a system of equations:
Applying the Substitution Method, you can substitute the second equation into the first equation and then solve for "x":
Answer:
$2.25
Step-by-step explanation:
First, we (always) highlight key details. In this case, we would highlight that th candy is 90 cents per pound, and the she bought 2.5 pounds. Now, we just multiply 2.5 by .90, and boom! We get $2.25. Mrs. Nixon spent $2.25 (or two dollars and twenty-five cents) on candy bars.
I think it is -5
If you divide -1/2 and then 4/1 you will get -5/1 or also known as -5
Answer:
$0.20
Step-by-step explanation:
To find the price of the apples we will divide the total price buy the number of apples. 1.8/9
1.8/9=.20
So each apple cost $0.20
Time to check
.20 x 9=1.8
