02-11-2016
Mathematics

contestada

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

Respuesta :

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

select the reason that best supports statement 5 in the given proof

When a calcium atom forms an ion, it loses two electrons. What is the electrical charge of the calcium ion? a) −2 b) −1 c)+ 1 d) + 2

Find the sum of the following geometric sequences a) 6 terms (-4, 12, -36,...)

find the sum of the geometric series given the following information

when you add this antibody to the cell, you find that it activates the cell response, even when no signaling molecule is present. explain this result.

Who first spoke of the “iron curtain”? George Kennan Harry Truman Winston Churchill Joseph Stalin

The volume of this triangular prism is 162 cubic inches. What is the value of z?

Explain the importance of teamwork. Then, provide an example of a time in which you worked with a team and there was a positive benefit. Explain in detail. 1 p

About how many gallons of grape juice are shown in the picture? A. 15 B.10 C.4 D.3

Voting in a presidential election is an example of citizenship at the..... A. national level B. city level C. county level D. state level