Icantfindausername
Icantfindausername Icantfindausername
  • 03-11-2016
  • Mathematics
contestada

Systems of equations using linear combinations/elimination

2x+5y=3
-x+3y=-7

a.4,1
b4,-1
c2,1
d2,0

Respuesta :

Cindycawell01 Cindycawell01
  • 03-11-2016
The answer is B
2x+5y=3(1) times it by 1
-x+3y=-7(2) times it by 2
____________________
2x+5y=3
-2x+6y=-14
__________
11y=-11
Y=-1

Now we have to found x..... you have to plug in -1 in 2x+5y=3...

2x+5(-1)=3
2x-5=3
2x=3+5
2x=8
X=8/2
X=4

There are your 2 solutions... hope you understand

Answer Link

Otras preguntas

Inequality: 3-4x>3x-18 =x<3 does x=0 satisfy the inequality? Explain ur answer
6 Question 2 (1 poin) A rocket traveling at 39.09 m/s is accelerated uniformly to 99.03 m/s over a 22.82 s interval. What is its displacement during this time
Finance managers tend to be more customer centric than marketers True or false?
A serves as a long-term storage area for water or nutrients.​
PLS HELP The lines below are parallel. If the slope of the green line is -3/4, what is the slope of the red line?​
When too many fertilizers enter a body of water, an uncontrolled growth of algae may result. The algae consume all of the dissolved oxygen, killing marine life.
PLS WRITE THE ANSWER
A Fahrenheit thermometer shows that the temperature is 15 degrees below zero. Enter the integer that represents the temperature in degrees Fahrenheit.
Red pencils cost 3 for 10¢. Blue pencils cost 5¢ each. Green pencils cost 2 for 5¢. If you can purchase any color you wish, what is the greatest number of penci
4∣3c+5∣=16c I know the answer is five but I don't know how to get there