<PRE><B>Question 75618</B>
first question is,A solution of the equation 4x=10-cy is (5,-2).What is the value of c?
Let x=5; let y=-2
4*5 = 10 - c*-2
20 = 10 + 2c
2c=10
c=5
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The next one is,Find g(9) given that g(x)=2x+3.

g(9)=2*9+3=21
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The next is,Find h(4) given that h(x)=x/2minus7.
h(4)= 4/2 - 7
h(4)= 2-7
h(4)=-5
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And the last one is,Assume that y varies directly as x.Find y when x =54 if y= 1/4 when x=3/2.
If y vaies directly as x, y=kx
If y=1/4 when x= 3/2 then (1/4)=k(3/2) and k=(1/4)*(2/3)=1/6
So the proper equation is y= (1/6)x
Now, find y when x=54:
y=(1/6)54
y=9
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Cheers,
Stan H. 






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