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3 years ago

If y varies inversely with x and y =5 when x=20 find x when y = -4

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

7 0

Answer:

x=-25

Step-by-step explanation:

Inverse variation

xy =k

We know x and y

20*5 =k

100 =k

So the formula is

x y = 100

We know y = -4

x (-4) = 100

Divide each side by -4

-4x/-4 = 100/-4

x = -25

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Given :

term of the sequence 29, 20, 11, ...

We need to find out the formula for the nth term of the given sequence

Lets find out whether the given sequence is arithmetic or geometric

In the given sequence , common difference is 9

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we can say difference =-9

General explicit formula

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If y varies inversely with x and y =5 when x=20 find x when y = -4​

If y varies inversely with x and y =5 when x=20 find x when y = -4