03-07-2014
Mathematics

contestada

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.

Respuesta :

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

Otras preguntas

Instrumental ties are Select one: a. means-ends oriented to achieve some sort of goal. b. based on strong emotional investment. c. based primarily on sexual exp

What is each horizontal row of elements in the periodic table called?

16+2b-7b subtracting like terms

You earn $5 for every bracelet you sell.write and solve an equation to find the number of bracelets you have to sell to earn $85.

8C4 Evaluate expression

What were items that the Greeks traded?

3x - 1 + 9x - 7 + 19 = 180 what does x equal

Specify the l and ml values for n = 4.

Which kind of rhetoric is Anthony most clearly using in the passage? O A. Pathos O B. Logos O C. Repetition O D. Ethos

A ship sails 20 km west then 35 km south. Calculate how far it is from it's starting position to 1 decimal place.