Five friends Adam, Bipin, Chen, Dana and Erica all take a maths test. Their teacher decides not to tell them their individual marks but gives
them the following information:
• Adam, Bipin and Chen together scored 200 marks.
• Bipin, Chen and Dana together scored 215 marks.
• Chen, Dana and Erica together scored 224 marks.
• The two girls (Dana and Erica) scored more than Chen.
• The five of them together scored 350 marks and each of them scored
a whole number of marks.
What were their individual scores?​

bharat mata ki jay bharat mata ki jay

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.