Tjgg
Tjgg Tjgg
  • 02-11-2016
  • Mathematics
contestada

-x+2y=9
-7x-2y=-1
Solve each system by elimination

Respuesta :

Azieq
Azieq Azieq
  • 03-11-2016
x - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me
Answer Link

Otras preguntas

Addison studies a tarantula that is 30 mm long suppose she uses a microscope to magnify the spider by 4×10 to the second power how long will the spider appear t
Addison studies a tarantula that is 30 mm long suppose she uses a microscope to magnify the spider by 4×10 to the second power how long will the spider appear t
Factor the trinomial: 5x^2-2x-7
Why did the Europeans want a new allwater route to Asia? How did the renaissance encourage voyages of exploration
what is a common noun for south america
How do you say the number 4.293? Also, write two other forms of this number.
how do solar system and galaxies differ?
H(x)=(x^2)+1 and K(x)=-(x^2)+4. If K(H)=0, what are the roots/solutions? a. ±i√3 b. ±i c. ±2 d. ±1 e. ±1, ±i
What is the right way to write fifty cents ? Is it $.50 or .50
If sulfur 34 undergoes alpha decay, what will I become?