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

A recursive method may call other methods, including calling itself. A recursive method has: 1. a base case -- a case that returns a value or exits from a meth

what principle did Martin Luther King Jr and others learn from the political strategy of Gandhi?

4. My sister ............ from Meerut presently. (return)

At the end of world war II, americans reversed their usual policy of isolationism and instead embraced internationalism and the responsibilities of being a majo

whats the mean, median, mide and range of 4,6,3,1,9,0,5? please answer.

The side length of the chessboard is 7 inches. Find the area of the chessboard.

100 POINTS PLEASE HELP ON HW

A well insulated rigid tank contains 4 kg of argon gas at 450 kPa and 30 C. A valve is opened, allowing the argon to escape until the tank pressure drops to 200

Select the correct answer from each drop-down menu. The equation of a line is 3/5x+1/3y=1/15 The x-intercept of the line is and its y-intercept is

4^12*6^15*7^21 HEELPOOOOPO