Mixture word problems L1-L3 and Semester review

Find the amounts of 20% salt solution and 8% salt solution that should be mixed together to make 500 ml of 15% salt solution.

• 291.67 ml of 20% salt solution,
  208.33 ml of 8% salt solution

• 280 ml of 20% salt solution,
  220 ml of 8% salt solution

• 208.33 ml of 20% salt solution,
  291.67 ml of 8% salt solution

• 220 ml of 20% salt solution,
  280 ml of 8% salt solution

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.C.6

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.3

CCSS.HSA.SSE.A.1

An owner of a gourmet food store has two varieties of herbal tea, one that costs $40 per kilogram and another that costs $50 per kilogram. How many kg of each type are needed to make 20 kg of a blend worth $46 per kg?

• 12 kg @ $50/kg + 8 kg @ $40/kg

• 14 kg @ $50/kg + 6 kg @ $40/kg

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.C.6

CCSS.HSA.CED.A.1

CCSS.HSA.CED.A.3

Marsha has many nickels and dimes worth 625¢ all together. She has three times as many nickels as dimes. How many nickels does she have?

• 25 nickels

• 75 nickels

• 27 nickels

• 70 nickels

Tags

CCSS.8.EE.C.7B

3 gallons of a 20% sugar solution is mixed with 5 gallons of a 50% sugar solution. What is the concentration of the mixture?

• 30%

• 40%

• 41.875%

• 38.75%

Tags

CCSS.8.EE.C.7B

100 mL of a 12% saline solution is mixed with 250 mL of an 18% saline solution. What is the concentration of the resulting mixture?

• 14.1%

• 16.3%

• 22.5%

• 18%

Tags

CCSS.8.EE.C.7B

On the semester final, Joe scored 85, Jill scored 89, and Bill scored a 99.What was the average score for these students? _________

• 91
• 273

Tags

CCSS.7.EE.B.3

Mary read six books in January, four books in February, and eight books in March.What was the average number of books read each month? __________

• 18
• 6
• 14

Tags

CCSS.3.OA.D.8

Mrs. Bolduc and Mrs. McCarthy are leaving the high school at the same time but going in opposite directions. Mrs. McCarthy is driving 10 mph faster than Mrs. Bolduc. In 4 hours they are 400 miles apart. What is Mrs. Bolduc speed?

• 40 mph
• 45 mph
• 50 mph
• 55 mph

Tags

CCSS.HSA.CED.A.1

The freshman class is selling trail mix to raise money for penny pounds. They are mixing chocolate that cost $2.25 per lb and pretzels that cost $0.90 per pound. They want to make 25 pounds of a mixture that they can sell for $1.71 per pound. How much chocolate do they need?

• 15 lbs
• 10 lbs
• 12 lbs
• 20 lbs

Tags

CCSS.8.EE.C.7B

Do I need to flip my sign?
3x  ≥ 12

• Yes
• No

Tags

CCSS.6.EE.B.8