odelllinkin2002 odelllinkin2002

01-11-2017
Mathematics

contestada

3x+5y=2 and 9x+11y=14 equals

Respuesta :

choixongdong choixongdong

01-11-2017

3x+5y=2 (1)
9x+11y=14 (2)

multiply equation (1) by 3
9x + 15y = 6

so
9x + 15y = 6 (1')
9x + 11y =14 (2)
-------------------------subtract
4y = -8
y = -2

3x+5y =2
3x+5(-2) =2
3x - 10 = 2
3x = 12
x = 4

answer
(4, -2)

Answer Link

Otras preguntas

The 14th amendment guarantees: A. That states will not deny anyone equal protection of the laws B. That everyone except criminals will be counted figuring a st

Emily just hired a new employee to work in your bakeshop. In one hour the employee burned 650 chocolate chip cookies. If this represented 13% of the day’s produ

Which of the following was not true about the United States in the mid-1830s to help set the stage for the era of settlers and settlers in the Pacific Northwest

In which parts of “I hear America singing” are adjectives used to enhance the effects of parallelism?

how are igneous rocks created

Find the value of the variables. 15 PTS!! {-12 -w^2} { 2k -81 } = {2f 3 } {-14 3 }

Mr.Lopez owns a home that sits on 7/8 of an acre. He has decided to plow up 1/4 of the property to create a garden. What fraction of an acre did he plow up

any abnormal and uncontrolled growth of tissue whether benign or malignant is called a

Which of the following is not true of carbon? (2 points) It can form rings. It has a valance of four. It forms strong ionic bonds. It can bond to form long chai

In 1976, the Lockheed SR-71A Blackbird set the record speed for any airplane: 3.53*10^3 km/h. Suppose you observe this plane ascending at this speed. For 20.0 s