If (x+3) varies directly as you and x= 3 when y= 12
Find the ;
i)relationship between x and y
ii) value of x when you = 8
2 answers
Please proofread and repost.
you must have meant:
If (x+3) varies directly as y
then,
x+3 = ky
when x=3, y=12, so
6 = 12k
k = 6/12 = 1/2
then x+3 = (1/2)y
or
2x + 6 = y
when "you" = 8
2x+6=8
2x=2
x = 1
If (x+3) varies directly as y
then,
x+3 = ky
when x=3, y=12, so
6 = 12k
k = 6/12 = 1/2
then x+3 = (1/2)y
or
2x + 6 = y
when "you" = 8
2x+6=8
2x=2
x = 1