y=_____
2007-04-04 21:26:16 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
y = k/x
when x = 0.5, y =40
40 = k/0.5
40 = 2k ---(1)
when x = 20
y = k/20 ---(2)
(2)/(1)
y/40 = 1/40
y = 1
2007-04-04 21:35:41 · answer #1 · answered by seah 7 · 1⤊ 0⤋
y = k / x is the formula for inverse proportionality and we have xy = k or 40 X 0.5 = k = 20
So, when x = 20, y = 1.
2007-04-05 05:10:57 · answer #2 · answered by Swamy 7 · 1⤊ 0⤋
y=1600
2007-04-08 03:07:18 · answer #3 · answered by ssmm 1 · 0⤊ 0⤋
y = k/x where k is a constant, so
y1(x1) = y2(x2) = k
y1 = y2 x x2 / x1
= 40 x 0.5 / 20
= 1
As it varies inversely, that means as x become bigger, y become smaller.
2007-04-05 04:58:50 · answer #4 · answered by looikk 4 · 0⤊ 0⤋
1600
2007-04-05 04:33:42 · answer #5 · answered by Anonymous · 0⤊ 3⤋
y=1600
2007-04-05 04:32:30 · answer #6 · answered by Molly 1 · 0⤊ 3⤋
hi
my ans is
let assume y=(k/x)
if y=40,x=.5 then k=20
so when x=20....................y=1
2007-04-05 04:36:01 · answer #7 · answered by goud 1 · 0⤊ 0⤋
y=400. hope its correct.
2007-04-05 04:35:46 · answer #8 · answered by azwan a 2 · 0⤊ 2⤋