Question

y varies inversely as twice x. When x = 1, y = 3. Find y when x = 4.

Answer 1

Answer Choices
a.) one-half

b.) two-thirds

c.) three-fourths

d.) one-fourth

Answer 2

y = k/x
nd 3 = k/1
find k
nd then
y = k/4

Answer 3

y varies inversely as twice x: y ~ \(\large \frac{k}{2x}\rightarrow 3=\frac{k}{2(1)}\rightarrow k=6\)
so \(\large y=\frac{6}{2x} \)

now just replace x with 4 and figure out y.....

Answer 4

can someone please give me the answer :( please i dont understand

Answer 5

y = k/2x

1. for x =1 & y =3

3 = k / 2 (1) , so K = 6

2. Now x = 4, y = ??

y = 6/ 2(x)

y = 6/ 2 (4)

y = 3/4... is the answer..

Answer 6

THANK YOU SO MUCH! it makes much sense now.

Answer 7

wc.. :)