Cause you have the slashes and 2/4/5/6/7and 3/4/5/6/7

**Answer:**

x=12

**Step-by-step explanation:**

Looking at the numbers, we can see that the differences are 72, 36, and 18. Notice that they are each factors of the next by the same constant 2.

18 * 2 = 36

36 * 2 = 72

There, it means that 18/2 will be subtracted from 20.

20 - 18/2

= 20 - 9

= 11

The next number in the sequence would be 11. Hope this helps!

**Answer:**

32 miles per gallon

**Step-by-step explanation:**