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Molodets [167]
3 years ago
14

Please answer thissss thank youuu

Mathematics
1 answer:
Georgia [21]3 years ago
5 0

Answer:

  • a) f(x) = - 20x + 450
  • b) 30 pages left to read

Step-by-step explanation:

<u>Given sequence:</u>

  • 430, 410, 390, ...

The first term is 430 and the common difference is - 20.

a)

<u>Required function is:</u>

  • f(x) = 430 - 20Ix - 1) = 430 - 20x + 20 = 450 - 20x

or

  • f(x) = -20x + 450

b)

<u>Find the number of pages left after 21 days:</u>

  • f(21) = 450 - 20*21 = 450 - 420 = 30
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