Edu F.

asked • 09/13/17

given that y = nx^m-4 and y=8 when x=2and y = 71 when x=5. the value of n is

given that y = nx^m-4 and y=8 when x=2and y = 71 when x=5. the value of n is

Mark M.

y = nxm-4
or
y = nxm - 4?
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09/13/17

Edu F.

y = nxm - 4
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09/13/17

1 Expert Answer

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Mark M. answered • 09/13/17

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y = nxm - 4
 
8 = n2m - 4
12 = n2m
 
71 = n5m - 4
75 = n5m
 
12 / 2m = 75 / 5m
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Mark M.

Hit the enter too early!
 
12 / 75 = 2m / 5m
12 / 75 = (2 / 5)m
0.16 = 0.4m
 
m = ?
 
Now go for n!
 
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09/13/17

Edu F.

Thank you for your help. 
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09/13/17

Mark M.

You are welcome. Glad to have helped with this rather tricky problem
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09/14/17

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