Question

Tell whether the sequence is arithmetic. If it is, identify the common difference. -7,-3, 1,5

A) Not arithmetic
B) Arithmetic, common difference is 4
C) Arithmetic, common difference is 9
D) Arithmetic, common difference is 7
Tell whether the sequence is arithmetic. If it is, identify the common difference.-9,-17, -26,-33
A) Not arithmetic
B) Arithmetic, common difference is 8
C) Arithmetic, common difference is 9
D) Arithmetic, common difference is 7
Tell whether the sequence is arithmetic. If it is, identify the common difference. 19,8,-3,-14
A) Not arithmetic
B) Arithmetic, common difference is -11
C) Arithmetic, common difference is 5
D) Arithmetic, common difference is 17

Answer 1

1 is B, 2 is A, 3 is B

Explanation:

I had these questions and got this correct

I tried adding/subtracting each number in the sequences by the givin choices. (ie.: -7+4=-3+4=1+4=5, etc. )(19-11=8-11=-3-11=-14, etc.)

Common difference is the pattern in which the sequence increases/decreases. Therefore, 1)B, 2)A, 3)B

Answer 2

-3 -(-7) = -3+7 = 4

1-(-3) =1+3=4

5-1 =4

Arithmetic the common difference is 4

-17 --9 = -17+9 = -8

-26 --17 = -26 +17 =9

Not arithmetic

8-19 = -11

-3-8 =-11

-14--3 =-14+3=-11

Arithmetic the common difference is -11