Question

Inverse Variation. MEDAL for help!

Answer 1

y varies inversely with x. If y = 40 when x = 16, find x when y = -5.

Answer 2

@jhonyy9 @KamiBug

Answer 3

do you know what mean direct and invers variation ?

Answer 4

I am pretty sure that the formula for inverse variation: \(\large y = \frac{k}{x}\)

Answer 5

for this case of invers variation from your above exercise how will result this numbers ?

Answer 6

Okay so \(yx = k\). I can use that by \((40)(16)= 640\).

\(\large -5 = \frac{640}{x}\)

Answer 7

And I would try to find what \(x\) would equal to.

Answer 8

Is that correct?

Answer 9

yes using this above wrote formula is right sure

Answer 10

\(\large -5 = 640x\)

\(\large x = -0.0078125\)

Answer 11

why so ????

above have wrote
640
-5 = ---- so from this x = ?
x

Answer 12

x = -128

Answer 13

yes

Answer 14

Thanks!

Answer 15

np

you are welcome