Which of the following is a geometric series? A: 0.1 + 0.3 + 0.5 + 0.7
B: 1 + 3 + 9 + 27
C: 19 + 17 + 15 + 13
D: 0.4 + 0.9 + 1.5 + 2.2

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