toxxicalexxis toxxicalexxis

24-03-2021
Mathematics

contestada

A variable needs to be eliminated to solve the system of equations below. Choose the
correct first step.
-3x - 9y = 36
X - 9y = 12

Respuesta :

viktoria80 viktoria80

24-03-2021

Two different things u can do
Substitution:
X-9y=12
+9y +9y
X=9y+12

-3(9y+12)+9y=36
-27y-36+9y=36
+36 +36
-18y = 72
/-18 /-18
Y = -4

Or whatever this other I’ve is called

-3x-9y=36
-1(X-9y)=(12)-1

-3x-9y=36
-x+9y=-12

-4x=24
X= -6

Answer Link

Otras preguntas

What did you observe when you mixed solutions of sodium carbonate and calcium chloride?

The complete sentence that appears on line 18 of the King Arthur’s Knights excerpt is an example of a(n) _[blank]_ sentence. "While it was yet dark a great stra

Write a java program that determines the position of the hour and minute hands of an analog clock at a moment in time. using a 12-hour clock (where the hour han

the value 299,792,458 m/s in proper scientific notation to 4 significant figures

A hierarchical topology is also called a _____ topology.

Consider the network shown below assume that the mesh currents are assigned as shown, resitances are expressed in kiloohms

You want to ghost your network's computers with a fresh desktop that features Windows 8, as your computers currently use Windows 7. You will use Norton Ghost to

What did you observe when you mixed solutions of sodium carbonate and calcium chloride?

Two people must have the same speed and velocity if A) they are walking toward each other at 2 m/s. B) they are walking away from each other at 2 m/s. C) they

if x + 2 is a factor of x^2 +mx + 14 find m