EXERCISE 3.1
1. Aftab tells his daughter, "Seven years ago, I was seven times as old as you were
Also, three years from now, I shall be three times as old as you will be." (Isa
interesting?) Represent this situation algebraically and graphically
Answers
Answered by
15
let the present age of aftab be x and that of her daughter be y
according to the question,
x-7=7(y-7)
x-7=7y-49.........(1)
also,
x+3=3(y+3)
x+3=3y+9
x=3y+6
placing it in equation (1)
3y+6-7=7y-49
4y=48
y=12
x=42
therefore, age of Aftab=42 years
age of his daughter=12 years
suresh6523:
y should be -12
Answered by
3
Answer.
Let the age of Aftab =years
Let the age of his daughter =y years
A. T. Q
1st condition
X-7=7(y-7)
X-7=7y-49
X-7y=-42.......equation (1)
2nd condition
X+3=3(y+3)
x+3=3y+9
X-3y=9-3
X-3y=6...equation (2)
for graphical representation
x-7y=-42
X =0 ,-42
Y=6,0
X-3y=6
X=0,6
Y=-2,0
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