03-06-2015
Mathematics

contestada

−4x + y = 6
−5x − y = 21

Respuesta :

apologiabiology apologiabiology

03-06-2015

assuming x=x and y=y in both equations
add them together

-4x+y=6
-5x-y=21 +
-9x+0y=27
-9x=27
divide by 9
-x=3
multiply -1
x=-3

subsiutte
-4x+y=6
-4(-3)+y=6
12+y=6
subtract 12
y=-6

x=-3
y=-6
the soultion set is in (x,y) form
(-3,-6)

Answer Link

Otras preguntas

What is the difference between displacement and double displacement reactions?Write equations for these reactions?

What is a Mandala Autobiography?

A storage tank shaped Like a rectangular prism is being manufactured to hold 100,000 cubic feet of natural gas. It has a length of 10 feet and a width of 25 fee

. What are three factors that could contribute to a source not being credible?

Which statement is NOT true?A. If two coplanar lines do not intersect, then the lines are parallel.B. Two lines lie in one plane and do not intersect if and on

Consider the following system of equations. y = 2x - 2 y - 2x = 5 What can you conclude about the system of equations? The system of equations is inconsistent.

What do you mean by corrosion? How can you prevent it?

Write this statement as a conditional in if-then form: All triangles have three sides. A) If a figure is a triangle, then all triangles have three sides.B) If a

Write this statement as a conditional in if-then form: All triangles have three sides. A) If a figure is a triangle, then all triangles have three sides.B) If a

A 1700 kg 2006 Mustang GT can accelerate from rest to 100 km/h in a time of 5.0 s. Determine the net amount of work that must be done on the car to cause this

RELAXING NOICE