Question

plz help me tomorrow is my math exam

solve the question plz

I will mark u as brainlist



if y is directly proortional to 1/x and x = 2 when y =20 ,what is the value of x when y= 1.25

Answer 1

hope this helps
plz mark as brainliest

Answer 2

We have,
y is proportional to 1/x

Therefore,
$y = k. \frac{ 1}{x}$

When y = 20 and x = 2
$20 = k. \: \frac{1}{2} \\ = > 20 \times 2 = k \\ = > k = 40$
When y = 1.25
Therefore,
$1.25 = k. \frac{1}{x} \\ = > 1.25 = 40 \times \frac{1}{x} \\ = > \frac{1.25}{40} = \frac{1}{x} \\ = > 1.25x = 40 \\ = > x = \frac{40}{1.25} \\ = > x = 32$
Hope it'll help u..