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January 31, 2015

January 31, 2015

Posted by **Melissa** on Thursday, September 22, 2011 at 8:16pm.

a) use function notation to express the final answer in terms of the orginal number

b)determine the outputs for the input numbers 1, -1, & 7

c) determine the maximum result possible

- Math -
**Steve**, Friday, September 23, 2011 at 1:25pmStart with n. Follow the steps:

x5 = 5n

from 20 = 20 - 5n

xn = n(20-5n)

a) 20n - 5n^2

b) f(1) = 15

f(-1) = -25

f(7) = -105

c) 20n-5n^2 = 5n(4-n)

This is zero at n=0,4

It thus attains its maximum at x=2

f(2) = 20

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