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14 March, 16:51

Carlos bought a total of 405 fish for a museum display. He bought parrotfish and angelfish. He bought 8 times as many parrotfish as angelfish. Let the variable x represent the number of angelfish Carlos bought and the variable y represent the number of parrotfish he bought. Use a system of equations to model and solve this situation. What is the solution to the system of equations? (60, 345) (45, 360) (55, 350) (35, 370)

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  1. 14 March, 17:15
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    x+y=405

    x=8y

    plug it into the first equation

    8y+y=405

    9y=405

    y=45

    now we can plug it back into x+y=405

    x+45=405

    x=360

    The answer is (45, 360)
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