Welcome to Westonci.ca, the place where your questions are answered by a community of knowledgeable contributors. Explore our Q&A platform to find reliable answers from a wide range of experts in different fields. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals.


which ordered pair is a solution of the system of equations

y=-3/5x

x-3y=-42

A.(70,-42)

B.(-21,63/50)

C.(5,3)

D.(-15,9)




Sagot :

AL2006
y=-3/5x
x-3y=-42

Plug the first one into the second one, for 'y' :

x - 3(-0.6x) = -42
x + 1.8x = -42
2.8x = -42

x = -42/2.8 = -15

Plug this back into the first equation above:

y = -0.6(15) = 9

The 'ordered pair' is (-15, 9).  That's choice (D.).