Answer:
9
Step-by-step explanation:
Because 3 letter to find that just do 3 times 3 which = 9
Hope This Helped
Answer:
Dilation by a scale factor of 3 followed by reflection about the y-axis.
Step-by-step explanation:
C: 4 is the right answer
Step-by-step explanation:
Given
a1 = -3
a15 = 53
We know that explicit formula for the arithmetic sequence is:
![a_n=a_1+(n-1)d](https://tex.z-dn.net/?f=a_n%3Da_1%2B%28n-1%29d)
For the 15th, term it will be
![a_{15}=-3+(15-1)d\\53=-3+14d](https://tex.z-dn.net/?f=a_%7B15%7D%3D-3%2B%2815-1%29d%5C%5C53%3D-3%2B14d)
Adding 3 on both sides
![53+3 = -3+3 + 14d\\56 = 14d](https://tex.z-dn.net/?f=53%2B3%20%3D%20-3%2B3%20%2B%2014d%5C%5C56%20%3D%2014d)
Dividing both sides by 14
![\frac{56}{14}=\frac{14d}{14}\\d=4](https://tex.z-dn.net/?f=%5Cfrac%7B56%7D%7B14%7D%3D%5Cfrac%7B14d%7D%7B14%7D%5C%5Cd%3D4)
Hence,
C: 4 is the right answer
Keywords: Arithmetic sequence, Common Difference
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