What is the explicit formula for the sequence?
7, 2, –3, –8, –13, . . .

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Explanation:

is the first term

is the common difference, telling us to add -5 to each term to get the next term. This is the same as subtracting 5 from each term

The nth term of the arithmetic sequence is,

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As a check, let's plug in n = 4 and we should get -8 as our fourth term

so that confirms that portion of the sequence. I'll let you check the other values.

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s