Ash0405
Ash0405
02-02-2015
Mathematics
contestada
Solve by substitution
X+3y=1 and -3x-3y=-15
Respuesta :
Аноним
Аноним
02-02-2015
[tex]x+3y=1\\ -3x-3y=-15\\ add\quad the\quad equ.\\ (x+3y)+(-3x-3y)=1-15\\ x-3x+3y-3y=-14\\ -2x=-14\\ x=\frac { -14 }{ -2 } \\ x=7\\ Let's\quad rewrite\quad the\quad equ.\\ 7+3y=1\\ 3y=1-7\\ 3y=-6\\ y=\frac { -6 }{ 3 } \\ y=-2[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 87+ )
Otras preguntas
In the diagram, HGF is a straight line. Given EF = 4 cm and HG = GF = 3 cm, find : (i) tan x (ii) sin y
Can some one PLEASE help?! Area of the shaded segment= The three last pictures are the choices.
How do variables help you model real-world situations? Give an example
What is the area of the sector bound by the center of the circle and arc CD in the circle below? Radius is 6 ft and central angle is 30 degrees.
Which of the following was an association of nations that was established to ensure world peace? A) League of Nations B) National Security Act C) Peace
Maxine wishes to purchase a pair of running shoes made by her favorite brand. Her budget is limited, and she notices shoes made by a competing brand are on sale
Please help!! I attached an image, will give most brainliest
A healthy environment depends on biogeochemical cycles maintaining a balance of input and output. High levels of nitrogenous compounds in the waterways can caus
If trap is an isosceles trapezoid, what is the value of x
The diagram below shows stream gradient. If a stream has a horizontal distance of 20 km and begins at an elevation 100 m higher than where it ends, what is its
