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  1. J

    Upstream Boat Rate Problem: "In 20 minutes while traveling upstream..."

    In 20 minutes while traveling upstream a river with a rate of 2 mph, the boat goes 528 miles. What is the rate of the boat in still water?
  2. J

    Graphing Absolute Value Inequality: 9|x - 2| - 10 >= -64

    I have a question. What's the answer to 9|x-2|-10>=-64? I thought it was all real numbers, but my teacher said it was no solution since absolute value can't equal a negative. Thanks in advance.
  3. J

    Help w Functions: math progr. says -x+y^2=2 is function

    I was doing this math program, and I got problems about whether a certain equation was a function. -x+y^2=2 was considered a function, and y=sqrt(x+1) was also considered a function. I don't get how. When solving square roots, don't we have to consider the positive or negative solution? Thanks...
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