Mixture Problems

1.

a. 1.6lbs peanuts and 3.4lbs cashews

b. No, minimum price for 5lbs is $11

c. 6.81lb (all peanuts)

2.

a. 0.8L of 10% solution and 0.2L of 35% solution

b. 1.6L of 10% solution and 0.4L of 35% solution

3. The bracelet density is 16.37 g/cc

4. 82 purchased in advance and 38 at the door

5. 10 gal of 40% and 5 gal of 100%

6. 25 multiple choice and 10 short answer

7. 23 multiple choice and 8 short answer

8. 4 multiple choice and 1 short answer

9. 1st way: \(𝑥 + 𝑦 = 5, 2𝑥 + 5𝑦 = 13\) 2nd way: \( 𝑥 + 𝑦 = 30, 2𝑥 + 5𝑦 = 87\)

10. Calculate what Kwan missed rather than what she got right: \(𝑥 + 𝑦 = 4, 2𝑥 + 5𝑦 = 14\)