Mixture Problems

Mr James has coffee worth $400/kg that he wishes to mix with 20kg of coffee worth $700/kg to get a mixture that can be sold for $500/kg. How many kg of the cheaper coffee beans should he use?

• 20kg

• 40kg

• 30kg

• 60kg

Tags

CCSS.HSA.CED.A.1

A collection of 108 coins containing only quarters and nickels is worth $21. Which value could replace q on the chart?

• 21

• 108

• 21 – n

• 108 – n

Tags

CCSS.6.EE.C.9

A lotion is made from an oil blend costing $1.50 per ounce and glycerin costing $1.00 per ounce. Four ounces of lotion costs $5.50. Which value could replace x on the table?

• (4 – g) 1.5

• (4 – g) + 1.5

• 4g – g(1.5)

• (4 – g)g

Tags

CCSS.8.EE.C.7B

A 4% peroxide solution is mixed with a 10% peroxide solution, resulting in 100 L of an 8% solution. The table shows the amount of each solution used in the mixture. What is the value of z in the table?

• 6

• 7

• 8

• 9

Tags

CCSS.HSA.CED.A.3

How many quarts of a 75% acid solution must be mixed with 3 quarts of a 10% acid solution to make a 60% solution?

• 15 quarts

• 10 quarts

• 9 quarts

• 5 quarts

Tags

CCSS.8.EE.C.7B