19-06-2016
Mathematics

contestada

Y varies directly as x. If y =-5 when X= 15, find x when y =3

Respuesta :

19-06-2016

y varies directly as x,
then y = kx

when y = -5, x =15
so,
-5 = k*15
k = -5/15 = -1/3

so, y = -x/3

when y = 3,
3 = -x/3
x= -3*3
x= -9.

Answer Link

Otras preguntas

I kind of know how to do these problems, but Im stuck on this one right now. Prove the formula below[tex]csc^{4}x - cot^{4}x = csc^{2}x + cot^{2}x[/tex]

A strong monoprotic acid ionizes in water. If the [H3O+] concentration is 1.56 x 10-4 M, what else is true?

Explain why the mexican government encouraged americans to settle in texas?

Determine the empirical and molecular formulas of a compound that contains 56.36% o and 43.64% p and has a molar mass of 284 g/mo

4. What are some positive effects of a rapid change to an ecosystem

How do today's dietary habits affect our lifespans and health, according to the speaker?

What resources did adolf hitler want to capture by attacking the southern soviet union?

what was the main arguments between the united states and Britain

please help me asap I really do not understand

What are the zeros of the quadratic function? f(x)=2x^2−128 Enter your answers in the boxes. and