Question

Celine has a bottle that contains 20% of milk and the rest water. The bottle has 1 liter of water. Part A: Write an equation in one variable that can be used to find the total number of liters of milk and water in the bottle. Define the variable used in the equation. (5 points) Part B: How many liters of milk are present in the bottle? Show your work. (5 points)

Answer 1

Percentage of milk PM
Liters of milk LM
Liters of water W
Total number of liters TL
W/100*PM = LM
W+LM =TL

Proof
1 liter / 100 = 10 milliliters
10 ml * 20 = 200 milliliters
200 ml + 1000 ml = 1200 ml
1.2 liters is the total amount of liters.

Answer 2

A.
a=all
0.20a+1=a
minus 0.20a both sides
1=0.80a
divide both sides by 0.80
1.25=all
all-water=milk
1.25-1=milk=0.25
there is 0.25 liters of milk in the bottle

B. 1.25 liters from previous answer