What is the common difference for the arithmetic sequence: 8.6, 6.2, 3.8, 1.4, −1, −3.4, …

Step-by-step explanation:

If you start with t1 = 8.6

and t2 = 6.4

Then tn - tn-1 = 6.4 - 8.6 = -2.4

In other words if you start at tn-1 and go to the next term tn you have to subtract 2.4 from the term to get to the next term.

t1 = 8.6

t2 = 6.2

t2 = 8.6 - 2.4 = 6.2

The difference is -2.4

In general tn+1 = tn - 2.4

you are saying it as if a fact, not a question, but yes, you would be correct? ; )

step-by-step explanation:

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3