moh133 moh133
  • 03-07-2014
  • Mathematics
Answered

Amy raised £n for charity.
Chris raised £18 more then any.
The mean amount raised by the two of them is £45.
Work out how much money each one of them raised.



Answer :

AL2006
AL2006 AL2006
  • 03-07-2014
Amy = n
Chris = n + 18

Mean = 1/2 (Amy + Chris)

45 = 1/2 (n + n + 18)
45 = 1/2 (2n + 18)
45 = n + 9

36 = n

Amy = 36
Chris = 54
Answer Link

Other Questions

Divide £300 in a ratio of 3:7
How did the flow of rivers effect the early history of Virginia?
Los Angeles Airport bears 140 degrees from San Francisco Airport and is 540 km away. A pilot is planning a direct flight from San Francisco Airport to Los Angel
What is the statement of an essay's main idea called?   A. a reason
Why was the construction of the Erie Canal such a great challenge?
When you hit a nail into a board using a hammer the head of the nail gets warm. In terms of kinetic and thermal energy describe why you think this happens?
Hamlet William Shakespeare Masterprose study questions 1. What mood is stressed at the outset of the play
why is the sun considered a star? how do solar flares affect communications ? HELP
Draw an array for the equation. 5+5+5+5+5=25
How did the flow of rivers effect the early history of Virginia?