3 years ago

Find the thirteenth term of an arithmetic sequence if the first term is 3 and the common difference is 3

Mathematics

1 answer:

lesya692 [45]3 years ago

8 0

Answer:

Step-by-step explanation:

Formula for the nth term (an) = a1 + d(n - 1) where a1 = the first term and d = common difference.

So here the 13th term = 3 + 3(13 - 1)

= 3 + 3*12

= 39 (answer).

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Answer:

0.5hrs

Step-by-step explanation:

Let the speed downhill be $x$ ,

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From this info, we can obtain the actual speed, $v_g$ on level ground as:

$x=120m/h\\0.75x=v_g\\\\\therefore v_g=\frac{0.75x \times 120m/h}{x}\\v_g=90m/h$

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Step-by-step explanation:

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Answer in pictures attached.

Step-by-step explanation:

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