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PilotLPTM [1.2K]
3 years ago
14

Which equation represent the nth term of the arithmetic sequence?

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
5 0

Answer:

<h2>         D.   aₙ = 5n - 11</h2>

Step-by-step explanation:

The equation of the nth term of the arithmetic sequence is: a_n =a_1+d(n-1)

d = 9 - 4 = 5

a₁ = -6

Therefore:

               a_n =-6+5(n-1)\\\\a_n =-6+5n-5\\\\a_n =5n-11

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Volunteers at Sam's school use some of the student council's savings for a special project. They buy 3 backpacks for $7 each and
nydimaria [60]

Answer:

Sam's student council spent $39 on backpacks + paper and pens.

Step-by-step explanation:

They bought 3 backpacks for $7 each. 3 x 7 = $21.

They also filled those backpacks with paper and pens costing $6 each. 3 backpacks x $6 = $18.

Now, add the two prices.

18 + 21 = 39

<em>hope this helps :)</em>

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3 years ago
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Answer:

C: investigation

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Based on empirical data, experiment and logical rational reasoning...

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write an equation using "x" and then solve the equationThe library bought 115 new fictions, 38 non-fiction and x new reference b
oee [108]

Answer:X=21

Step-by-step explanation:

115+38+x = 174

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3 0
3 years ago
What is the value of X?<br> A. 5<br> B. 2.5<br> C.7.5<br> D. 10
gizmo_the_mogwai [7]

10 is the value of x

3 0
3 years ago
2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.
Andrei [34K]

Let x and x+1 be these consecutive integers. For some base b, we can write

(x_{10})^2=220_b=2b^2+2b

((x+1)_{10})^2=251_b=2b^2+5b+1

If

x^2=2b^2+2b

then

x^2+1=2b^2+2b+1

Now,

x^2+2x+1=2b^2+5b+1

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3 0
3 years ago
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