Use the explicit formula an = a1 + (n - 1) • d to find the 500th term of the sequence below.
24, 31, 38, 45, 52, ...
A.3545
B.3493
C.3524
D.3517

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Notice that it's an arithmetic sequence with equal intervals of 7.

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## More answers

- anonymous

wait what

- anonymous

oo so it goes by 7 ok

- anonymous

You want the 500th term. So the increase from n=1 will be
7*499+24 is your answer

- anonymous

somits d

- anonymous

so its d

- anonymous

3517

- anonymous

Yup

- anonymous

thx your really god at this stuff

- anonymous

good

- anonymous

No prob

- anonymous

i got one more

- anonymous

got more questions?

- anonymous

yea its kinda the same

- anonymous

go ahed

- anonymous

The explicit formula for the nth term of an arithmetic sequence is an = a1 + (n - 1) • d. What is the simple formula corresponding to the explicit formula if the first term of the sequence is -10 and the difference between terms in the sequence is 3?
A. 3n + 10
B. 3n - 7
C. 3n - 10
D. 3n - 13
E. 3n + 13

- anonymous

note that difference between terms is always 3. And this quesiton is asking you to pick the equation when first term=-10

- anonymous

it think its c

- anonymous

All the other options are there to confuse the wits out of you:)

- anonymous

nice

- anonymous

omg ok this one is hard

- anonymous

First term is -10. So 3n+13

- anonymous

3n-13

- anonymous

n=1
3-13=10 right?

- anonymous

yea

- anonymous

do you know this one

- anonymous

D

- anonymous

Don't snitch on the losers

- anonymous

ik that but i have a different problem

- anonymous

Tile setters use small tiles in the shape of hexagons to create all sorts of decorative patterns. In the pattern below, a central red tile is surrounded by bigger and bigger six-sided rings of colored tiles. Only three colored rings are shown, but larger rings of white tiles surround the ones you see here.
http://media.apexlearning.com/Images/200511/02/e747e661-53da-4b77-98f1-81817eb5af47.gif
Don't count the red tile. The smallest ring has 6 blue tiles in it. The next ring has 12 yellow tiles. Count the number of green tiles in the third ring. Based on the pattern established by the first three rings, how many tiles are there in the 25th ring of white tiles, counting outward from the central red tile?
A. 144
B. 150
C. 156
D. 125

- anonymous

i hate this problem

- anonymous

Oh I see

- anonymous

d=+1

- anonymous

so the 25th ring is144

- anonymous

I took d as the additional tile outside of the equation.

- anonymous

so iwas right :D

- anonymous

ill brb ima go eat

- anonymous

6,12,18,24,30,36,42,48,54,60,66,72,78,84,90,96,102,108,114,,120,126,132,138,144,150,156,162,168,174...

- anonymous

so 144

- anonymous

it says don't count on the red tile so that would be 150

- anonymous

100% positive it's B

- anonymous

You can count me on this

- anonymous

ok

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