A famous instance of variation is Newton’s Law of Gravity. It states that the magnitude of the Force, F, of gravitational attraction between two masses, m1 and m2, varies directly with the product of the masses and inversely with the square of the distance, r, between them. Write a variation equation relating F, m1, m2, and r.

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anonymous · Answer

would someone please help me?

anonymous · Answer

Write a general formula to describe the variation: x varies jointly with the inverse of r and the inverse of the square of the sum of y and z.

anonymous · Answer

Find an expression for a rational function f(x) that satisfies the conditions: a horizontal asymptote at y = 0, vertical asymptotes at x = ±3, and contains the point (0, 1).

xapproachesinfinity · Answer

F=(m1m2)/r^2

anonymous · Answer

I think that answer to the 3rd one is f (x) = -9 / x^2-9

anonymous · Answer

Write a general formula to describe the variation: x varies jointly with the inverse of the sum of y and z.

xapproachesinfinity · Answer

that is the relation you are looking for
and that's what the information is telling 
direct relation is written like this y=kx
inverse relation is written like this y=k/x

xapproachesinfinity · Answer

post your other question in different post pls!!!

anonymous · Answer

sorry