Get the Math and Points! Aug 2014 CC Alg I #16

Aug 2014 16 CC Alg I
We will try n = 3 and n = 5 in each equation to see if the 3rd term is 10 and the 5th term is 26.

Using each answer with n=3 and looking for an answer of 10:
(1) 8n + 10,  substitute n = 3, 8(3) + 10 = 34 not 10!
(2) 8n – 14, substitute n=3, 8(3) – 14 = 10 keep this one
(3) 16n + 10, substitute n=3, 16(3) + 10 = 58 not 10!
(4) 16n – 38, substitute n=3, 16(3) – 38 = 10 keep this one

Now we have narrowed it down to either answer (2) or (4)
The fifth term is 26 so when n = 5, the answer should be 26
(2) 8n – 14 substitute n = 5, 8(5) -14 = 26!!!!
(4) 16n – 38, substitute n=5, 16(5) – 38 = 42 (not 26!)

That’s it for 2 more points!!  🙂

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