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

In living systems, what is needed for chemical reactions to occur at an efficient pace? Water Oxygen Enzymes Proteins

What is the main difference muscle cells and nerve cells?

Which is the best time to apply sunscreen? Before going to bed Just after going out in the sun 1 hour after going out in the sun 30 minutes before going out

(b+8)(b+2) please show work. I got b^2 + 10b + ?

the difference between a hundred and a number is four times that number

How did annotating the text give you a better understanding of it?

Read the passage from Anthem, by Ayn Rand. In this passage, the narrator is exploring an old, abandoned underground tunnel. But we pulled at the grill [on the

What does Walters decisions to move to the house create for the audience?

The number of people signed upfor a bus trip decreased from 45 to 35. What is the percent decreased? Round to the nearest percent.

Arron just paid $7.40 for a new pair of sunglasses. His father told him that prices were different 10 years ago. Then his grandfather told him that 20 years ago