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10 January, 19:03

In a seafood stew, Erin wants to use lobster, crab, and shrimp. She wants one part lobster, two parts crab, and three parts shrimp. lobster cost $20 per pound, crab cost $15 per pound, and shrimp cost $10 per pound. Erin has $40 to spend on the seafood mix. The equation 20x + 15 (2x) + 10 (3x) = 40 models the pounds, x. How many pounds of the seafood mix can Erin buy?

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  1. 10 January, 20:09
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    Answer: (B) 3

    Step-by-step explanation:

    20x + 15 (2x) + 10 (3x) = 40

    20x + 30x + 30x = 40

    80x = 40

    x = 40/80

    x = 1/2

    Find the amount of lobster

    Lobster = x = 1/2 pound

    Find the amount of crab:

    Crab = 2x = 2 (1/2) = 1 pound

    Find the amount of Shrimp:

    Shrimp = 3x = 3 (1/2) = 3/2 pounds

    Find the total pounds of seafood:

    Total = 1/2 + 1 + 3/2 = 3 pounds

    Answer: (B) 3
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