David cycles at 20mph for 1¼ hours, then at 16mph for 2 hours and then 12mph for 45 minutes. (a) Work out the total distance travelled.
(b) Work out the average speed for the entire journey.

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.

14

step-by-step explanation:

4n=2m

ratio of m to n: 2/4 = 1/2

answer

a. 1/2

humans' internal body temperature is a great example of homeostasis. when an individual is healthy, his or her body temperature retains a temperature 98.6 degrees fahrenheit. the body can control temperature by making or releasing heat. the maintenance of healthy blood pressure is an example of homeostasis.

step-by-step explanation: