A Mixture of 7 Pounds of Fertilizer A,21 Pounds of Fertilizer

question 51

Multiple Choice

A mixture of 7 pounds of fertilizer A,21 pounds of fertilizer B,and 8 pounds of fertilizer C provides the optimal nutrients for a plant.Commercial brand X contains equal parts of fertilizer B and fertilizer C.Commercial brand Y contains one part of fertilizer A and two parts of fertilizer B.Commercial brand Z contains two parts of fertilizer A,five parts of fertilizer B,and two parts of fertilizer C.How much of each fertilizer brand is needed to obtain the desired mixture? ​

• A)Brand X = 12 lb Brand Y = 15 lb
• Brand Z = 9 lb
• B)Brand X = 12 lb Brand Y = 9 lb
• Brand Z = 9 lb
• C)Brand X = 12 lb Brand Y = 15 lb
• Brand Z = 15 lb
• D)Brand X = 12 lb Brand Y = 9 lb
• Brand Z = 15 lb
• E)Brand X = 9 lb Brand Y = 15 lb
• Brand Z = 12 lb

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