What is the common difference in the following arithmetic sequence?

7, 3, –1, –5,

Step-by-step explanation:

The common difference of an arithmetic sequence is the difference in next term minus term before it.

We can check by taking all of the terms in the sequence given. the common difference will be same for all.

As you can see, the common difference is  

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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