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3 years ago

If y varies inversely as x, and y = 5 as x = -2, find y for the x-value of 3.

Mathematics

1 answer:

Veronika [31]3 years ago

8 0

Y=k/x cross multiply xy=k y=5 x=-2 5x-2=k
k=-10
using the equation y=k/x y=-10/3 y=-3.3 or -10/3

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Answer:

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Step-by-step explanation:

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4 years ago

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4 years ago

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3 years ago

Need help with some practice questions since all are different types I'm asking alot sorry!

sasho [114]

Answer:

Yes

Step-by-step explanation:

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3 years ago

Find the distance between the two points in simplest radical form.

sweet-ann [11.9K]

Answer:

3 $\sqrt{13}$

Step-by-step explanation:

Calculate the distance using the distance formula

d = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }$

with (x₁, y₁ ) = (- 9, 8) and (x₂, y₂ ) = (- 3, - 1)

d = $\sqrt{(-3-(-9))^2+(-1-8)^2}$

= $\sqrt{(-3+9)^2+(-9)^2}$

= $\sqrt{6^2+81}$

= $\sqrt{36+81}$

= $\sqrt{117}$

= $\sqrt{9(13)}$

= $\sqrt{9}$ × $\sqrt{13}$

= 3 $\sqrt{13}$

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3 years ago