Pens cost $0.35 each and books cost $4.90 each. A particular customer spent a total of $21.30. Which equation correctly describes the number of pens and books purchased? A. 0.35p - 4.90b = 21.30
B. 0.35b - 4.90p = 21.30
C. 0.35p + 4.90b = 21.30
D. 0.35b + 4.90p = 21.30

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

the radius is 2 times the diameter.

step-by-step explanation: