waffles69 waffles69

22-12-2016
Mathematics

contestada

Solve the system using an equivalent system

{-2x - y = 0
{3x - y = 10

A. (4,-2)
B. (-2,4)
C. (2,-4)
D (-4,2)

Respuesta :

apologiabiology apologiabiology

22-12-2016

add y to both sides in 1st equation
-2x=y
sub -2x for y in2nd equation
3x-(-2x)=10
3x+2x=10
5x=10
divide 5
x=2

sub back
-2x=y
-2(2)=y
-4=y

(x,y)
(2,-4)
C is ans

Answer Link

Otras preguntas

The African Union has implemented a common currency for the entire continent. . True False 1 points QUESTION 3 Extensive U.S. involvement in various affair

What is the solution to 2.1m = 6.3? A. m = 8.4 B. m = 3 C. m = 3.2 D. m = 4.2

Summarize Describe the main characteristics of cirrus, cumulus, and stratus clouds.

i have hard prolems on subtract 4.000 -6.000

Which words in this sentence are an independent clause? The forest that they are uncovering once held flowers that fell during a fire and were cooked until they

4. One tool for narrowing your topic is to _____.

I need help with this one. The USSR boycotted the 1984 Summer Olympic Games in _______ because the US installed nuclear weapons in Europe that pointed at Soviet

Which process forms clouds? a. evaporation c. condensation b. precipitation d. runoff

The African Union has implemented a common currency for the entire continent. . True False 1 points QUESTION 3 Extensive U.S. involvement in various affair

McCormick's reaper and Howe's thresher made raw materials cheaper for the textile industry. TRUE OR FALSE