1. + Homework 0.45(800) = 360 30% 50% = 45% a b 800 0.30a 0.50b 360#1
Jenny mixes a 30% saline solution with a 50% saline solution to make 800 milliliters of a 45% saline solution. How many milliliters of each solution does she use?
a = amount of 30% saline solution
0.45(800) = 360
b = amount of 50% saline solution
30% +
50% =
45%
solution
solution
solution
Amount of
Solution a b
800
Saline
0.30a
0.50b
360

2. 200 ml of 30% solution 600 ml of 50% solution Homework#1
Jenny mixes a 30% saline solution with a 50% saline solution to make 800 milliliters of a 45% saline solution. How many milliliters of each solution does she use?
a = amount of 30% saline solution
b = amount of 50% saline solution
200 ml of 30% solution
600 ml of 50% solution

3. Homework #2
Peanuts cost $1.60 per pound and raisins cost $2.40 per pound. Brad wants to make 8 pounds of a mixture that costs $2.20 per pound. How many pounds of peanuts and raisins should he use?
P = amount of peanuts (lbs.).
2.20(8) = 17.60
R = amount of Raisins (lbs.) +
Peanuts
Raisins =
Mixture
Amount (lbs) P R 8
Cost ($)
1.60P
2.40R
17.60

4. 2 pounds of Peanuts 6 pounds of Raisins Homework#2
Peanuts cost $1.60 per pound and raisins cost $2.40 per pound. Brad wants to make 8 pounds of a mixture that costs $2.20 per pound. How many pounds of peanuts and raisins should he use?
P = amount of peanuts (lbs.).
R = amount of Raisins (lbs.)
2 pounds of Peanuts
6 pounds of Raisins

5. + Homework 0.16(10) = 1.6 10% 25% = 16% a b 10 0.10a 0.25b 1.6#3
A pharmacist wants to mix medicine that is 10% aspirin with a medicine that is 25% aspirin to make 10 grams of a medicine that is 16% aspirin. How many grams of each medicine should the pharmacist mix together?
a = amount of 10% aspirin
0.16(10) = 1.6
b = amount of 25% aspirin +
10%
25% =
16%
Amount of medicine a b 10
aspirin
0.10a
0.25b
1.6

6. 6 grams of the 10% aspirin 4 grams of the 25% aspirin Homework#3
A pharmacist wants to mix medicine that is 10% aspirin with a medicine that is 25% aspirin to make 10 grams of a medicine that is 16% aspirin. How many grams of each medicine should the pharmacist mix together?
a = amount of 10% aspirin
b = amount of 25% aspirin
6 grams of the 10% aspirin
4 grams of the 25% aspirin

7. Homework #4
A coffee shop plans on selling it’s house blend for $8.50 per pound. The mix will be made from Mexican beans that cost $7 per pound, with Costa Rican beans that cost $9 per pound. How many pound of Costa Rican beans are needed to make 150 pounds of the house blend?
M = amount of Mexican beans (lbs.).
8.50(150) = 1275
C = amount of Costa Rican beans (lbs.) +
Mexican
Costa Rican =
Blend
Amount (lbs) M C
150
Cost ($) 7M 9C
1275

8. Homework #4
A coffee shop plans on selling it’s house blend for $8.50 per pound. The mix will be made from Mexican beans that cost $7 per pound, with Costa Rican beans that cost $9 per pound. How many pound of Costa Rican beans are needed to make 150 pounds of the house blend?
M = amount of Mexican beans (lbs.).
C = amount of Costa Rican beans (lbs.)
112.5 pounds of Costa Rican beans