Suppose that X and Y vary inversely. If y= - 4 when x=20, find y when x= 10.
How do you solve this problem?

if x=20 when y=-4, find y when x=10

if x=5 when y=-1/3,find y when x=10

if x=2.5 when y=100, find x when y=50

if x=-4/15 when y=-105, find x when y=4

step-by-step explanation:

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answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)