Question

Please answer thissss thank youuu

Answer 1

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

Explanation:

Given sequence:

• 430, 410, 390, ...

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

a)

Required function is:

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

or

• f(x) = -20x + 450

b)

Find the number of pages left after 21 days:

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