Which of the following sequences is not an arithmetic sequence? 0, -2, -4, -6, ... 1, 5, 9, 13, ... 15, 12, 9, 6, ... -1, -2, -4, -8, ...

D. -1,-2,-4,-8

Step-by-step explanation:

An arithmetic sequence means that there is a pattern between the numbers that is constant, that deals with either adding or subtracting.

The last sequence here, is not arithmetic because it is being multiplied by 2 every time.

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3