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zheka24 [161]
3 years ago
5

Hayley's birthday party will cost $27 if she invites 3 guests. How many guests

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
7 0

Answer:

imma say 12 guests

Step-by-step explanation:

sorry if wrong

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What is the explicit formula for this sequence?
ddd [48]

Answer:

a_n=-7+4(n-1)

or

a_n=-7+(n-1)(4)

Step-by-step explanation:

-7,-3,1,5,... is a arithmetic sequence.

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When you see arithmetic sequence, you should think linear equation.

The point-slope form of a line is y-y_1=m(x-x_1).

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Any they are using the point at x=1 in the point slope form.  So they are using (1,-7).

So let's put this into our point-slope form:

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y+7=4(x-1)

Subtract 7 on both sides:

y=-7+4(x-1)

So your answer is

a_n=-7+4(n-1)

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3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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