Tell whether the sequence 12, 4, -4, -12, -20, ... is arithmetic

yes, it is arithmetic as the common difference is -8

Good evening

Step-by-step explanation:

→ 4-12=-8

→ -4-4=-8

→ -12-(-4)=-8

→ -20-(-12)=-8

As you can see the difference between any two consecutive terms is the same which prove that it’s an arithmetic sequence .

:)

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1