How do you evaluate the expression 2n - 7 , for n=8?

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Answer 1 · 2018-04-30T21:30:04

#2n-7 = 9#

Substitute 8 for n in the first equation, then simplify:

#(2 * 8) - 7#

#16 - 7 = 9#

#2n-7 = 9#

Answer 2 · 2018-05-01T15:44:53

#9#

#2n-7# simply means a given sequence for certain values of #n#.

Using the equation for example for when #n=1#:

#2(1)-7#

#rArr=2-7=-5#

Therefore, using #n=8#:

#2(8)-7#

#rArr 16-7=9#