# Math

posted by Thanakorn

If w is partly constant and partly varies directly as x and w=9 when x=4 w=27 when x= 16 find
An equation connection x and w
And (b) the value of w when x =8

1. bobpursley

w=kx+c
9=k4+c
27=k*16+c

subtract eq 1 from eq 2
18=12k solve for k
then solve for c in either equation

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