Question Is the given sequence arithmetic? If so, determine the common difference d. 1,7,15,21,25,… Select the correct answer below: The sequence is arithmetic with d=1. The sequence is arithmetic with d=5. The sequence is arithmetic with d=6. The sequence is arithmetic with d=7. This sequence is not arithmetic.

the answer is a

step-by-step explanation:

because your just changing the position of where the shape is

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!