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Mathematics 9 Online
OpenStudy (anonymous):

Question !

OpenStudy (anonymous):

OpenStudy (igreen):

Just plug in 1, 4, and 10 for 'n' in the equation.. \(A(n) = -3 + (n - 1)(-2.2)\) \(A(1) = -3 + (1 - 1)(-2.2)\) Can you solve that?

OpenStudy (anonymous):

-3

OpenStudy (igreen):

How did you get -3?

OpenStudy (igreen):

First subtract 1 - 1.

OpenStudy (anonymous):

OK

OpenStudy (igreen):

What do you get?

OpenStudy (anonymous):

-5.2

OpenStudy (igreen):

Oh wait, nevermind..you're right..it is -3..

OpenStudy (anonymous):

haha ok lol

OpenStudy (igreen):

\(A(1) = -3 + (1 - 1)(-2.2)\) \(A(1) = -3 + (0)(-2.2)\) \(A(1) = -3 + 0\) \(A(1) = -3\)

OpenStudy (igreen):

Now plug in 4. \(A(4) = -3 + (4 - 1)(-2.2)\)

OpenStudy (anonymous):

-2.4

OpenStudy (igreen):

No..I got something different.

OpenStudy (anonymous):

mmm one sec

OpenStudy (anonymous):

I dont know

OpenStudy (igreen):

Okay, first subtract 4 - 1.

OpenStudy (igreen):

What do you get?

OpenStudy (anonymous):

k

OpenStudy (anonymous):

-9.6

OpenStudy (igreen):

Yep, you got it.

OpenStudy (igreen):

So the first term is -3, and the 4th term is -9.6..

OpenStudy (igreen):

You don't need to find the 10th term..because you should already have your answer.

OpenStudy (igreen):

So what's your answer going to be?

OpenStudy (anonymous):

d

OpenStudy (igreen):

Yep, you got it.

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