kaykay96 kaykay96

10-06-2014
Mathematics

Answered

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)

Answer :

10-06-2014

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.).

Answer Link

Other Questions

Need help with MAP test prep question 7 thank you

A chemist has 2753 ml of alcohol How many 20 ml beakers can be filled How much will be left over

for the love of God help me Im desperate for it tomorrow

What is the principal part of the underlined verb in the sentence Our mother took us to an art museum A present participle B past C present D past participle

wht is a irrational number

2x3y14 2xy10 How you do this

Middle School Math 10 Points 1 There are 9 marbles representing 3 different colors Write a problem where two marbles are selected at random without replacement

In 1985 why did Ronald Reagan violate his principle of not negotiating with terrorists I need help ASAP

Which plant structure is the dominant sporophyte of angiosperms

What is the answer to my question 2y54y5