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

Otras preguntas

Which experimental evidence supports Ernest Rutherford's theory that the atom is mostly empty space? Positively charged particles shot into gold foil are deflec

Which statement about conflict between whites and Native Americans is not true? a. White settlers often trespassed on Native American territory in search of gol

4. _______ is one of the first Latin American countries to have a separate ministry of tourism with dedicated funds within its federal governmental structure.

A furnace technician charges $20 per hour and a one-time service charge of $30. Which equation represents the total charge, y, for working x hours? A.y=20(x+30)

How did Andrew Johnson's behavior in office influence the events of the Reconstruction era? a. Johnson's behavior and use of the veto prevented Republicans from

Stan works on an assembly line. What effective and appropriate approach would he be wise to use when coping with minor frustrations like hang-ups on a conveyor

one reason why the industrial revolution began in england is because that country

a train goes forward at a speed of 1m/s for 20 sec then it stops and goes backward at a speed of 0.5m/s for 4 sec after both movements are completed how far is

Select the five statements which are TRUE. a. To vote a split ticket requires a knowledge of the qualifications of every candidate. b. An independent is a voter

Sound waves cannot travel in a vacuum because a. there is nothing for them to travel through b. there can be no waves of any kind in a vacuum c. they cannot get