Need Algebre help plz

Algebra
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1. Find the constant of variation for the quadratic variation. (01_12_LQ_1.gif )

       14

       35

       7

       21

2. Find the constant of variation for the quadratic variation.

(6y = 4x2)

 4/9

 2/3

3/2

–23. If f(x) varies directly with x2, and f(x) = 75 when x = 5, find the value of f(4).

       100

       50

       48

       25

4. Write a quadratic variation equation if g(x) varies directly with x2, and g(x) = 98 when x = 7.
Apr 16th, 2015

1. Please post the first question again.

2. 4/6 = 2/3

3.  f(5) = a * 5* 5 = 75

     so a= 75/25 =3

    f(4) = 3* 4* 4

            = 48

4. g (7)= 98 = a x^2

               98 = a * 7*7 

        so a = 98/49 

                  =2

so g(x) = 2x^2



Apr 16th, 2015

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Apr 16th, 2015
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