Question

if y is directly proportional to1/xand x=2 when y=20,what is the value of x when y=1.25​

Answer 1

Answer:

x=32

Step-by-step explanation:

y is directly proportional to 1 /x

Let y=k*1/x=k/x-----------(1)

x=2 then y=20

20=k/2

k=20*2=40

for y=1.25

form(1)

1.25=40/x

1.25x=40

x=40/1.25

=4000/125

=160/5

x=32