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

Jacob is buying ice cream. He can choose one flavor of ice cream: chocolate, strawberry, vanilla, or rocky road. He can put his ice cream in a sugar cone, wa

Suppose that Christine owns her own CPA firm. She uses only two inputs in her business: her hours worked (labor) and a computer (capital). In the short run, Chr

Dr. Jamison studies the part of the brain that is active when people are lying. She asks half of her participants to tell the truth about an event from their ch

Question 1 Fill in the blanks in the correct order. a duplication, translocation, inversion b inversion, duplication, translocation c duplication, inversion,

A new fast-food restaurant offered a free meal (valued at $5) a week for a year to its first 100 customers. Ramona camped out for 48 hours before the opening to

Consider a plant that grows best in bright sunlight in which seed germination is controlled by phytochromes. Which of the following statements describe(s) the s

Question 15 What was the reason for the Panama Canal?

Golddigger Services, Inc. provides services to clients. On May 1, a client prepaid Golddigger Services $60,000 for 6-months services in advance. Golddigger Serv

Which of the following were effects of the decision? Check all of the boxes that apply. 1. Abolitionists were angered by the decision and attacked slaveholders

Frida started to solve the equation 3x = 36 by adding 3 to both sides. Explain why Friday’s method will not solve the equation.