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Math Help - Basic algebra 2 homework help, please?

  1. #1
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    Basic algebra 2 homework help, please?

    7.) If the parabola y - 2 = a(x - 3)^2 goes through the point (2,0), what is the value of a?

    8.) Indicate whether the graphs of the following will have a maximum or a minimum:
    a.) f(x) = x^2 - 9
    b.) f(x) = 8x - 3x^2
    c.) f(x) = -(3 - x)^2

    9.) If y varies directly with x, and y = 10 when x = 15, find y when x = 6.
    10.) If x varies inversely as y and x = 2 when y = 8, find x when y = 17.

    11.) If y varies directly as x and inversely as z^2, and y = 3 when x = 2 and z = 4, what is the value of x when y - 6 and z = 2?
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  2. #2
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    Quote Originally Posted by margaritalima View Post
    8.) Indicate whether the graphs of the following will have a maximum or a minimum:
    a.) f(x) = x^2 - 9 min
    b.) f(x) = 8x - 3x^2 max
    c.) f(x) = -(3 - x)^2 max
    Here is number 8
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  3. #3
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    9.) If y varies directly with x, and y = 10 when x = 15, find y when x = 6.

    If y=10 when x=15 this is a 2 to 3 relationship

    When x = 6 this would make y = 4
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  4. #4
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    Thank you guys for all of the help so far! It really means a lot to me. [:
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