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

-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

i think the answer is b.

step-by-step explanation:

not 100% sure though.

step-by-step explanation:

consider the parallelogram shown in the attached image.

in the parallelogram hijk, the length of hk is given as,

from the properties of parallelogram we know that the opposite sides of a parallelogram are parallel to each other and are equal in measure.

therefore, the length of the side ij must be equal to the length of the side hk and that is .

hence, the expression for the length of ij confirms that hijk is a parallelogram.