## lyzzy7 2 years ago The function b(n) = 6n represents the number of light bulbs b(n) that are needed for n chandeliers. How many lightbulbs are needed for 15 chandeliers? 90 lightbulbs 2 lightbulbs 96 lightbulbs 80 lightbulbs

1. Brittni0605

n represents the amount of chandeliers you have. b(n)=6n represents how many lightbulbs are needed with respect to the amount of chandeliers you have

2. Brittni0605

\[b(n)=6n\] \[b(15)=6(15)\] \[b(15)= 90\]

3. lyzzy7

Okay! Thank you, so much! And I have another question, if you wouldntr mind helping?? Bamboo plants grow rapidly. A bamboo plant is 130 inches tall. Tomorrow it will be 143 inches tall, the next day it will be 156 inches tall, and on the next day it will be 169 inches tall. Write a rule to represent the height of the bamboo plant as an arithmetic sequence. How tall will the plant be in 13 days?

4. Brittni0605

Ok, so whats the formula for arithmetic sequences?

5. lyzzy7

For this probem +13?

6. Brittni0605

No, not for this problem. I mean you need to find the formula that sequences this problem.

7. Brittni0605

13 is the common difference.

8. Brittni0605

\[a_{n} =a_{1}+(n-1)d\]

9. Brittni0605

familiar?

10. lyzzy7

ohhh, yeah, I got ya. Now what?

11. Brittni0605

You said 13 is the difference, so what variable does that represent?

12. lyzzy7

a?

13. Brittni0605

No, d

14. lyzzy7

Ohh..

15. Brittni0605

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16. Brittni0605

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