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3 years ago

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:

Given sequence:

430, 410, 390, ...

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

Required function is:

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

f(x) = -20x + 450

Find the number of pages left after 21 days:

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

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