04-06-2018
Mathematics

contestada

slove the system of equations 3x-7y=5 and 9y=5x+5

Respuesta :

jinc0930 jinc0930

04-06-2018

3x-7y=5

9y=5x+5
-5x+9y=5

3x-7y=-5x+9y
8x=16y
x=16y/8
x=2y

3(2y)-7y=5
-1y=5
y=-5

-5(9)=5x+5
-45-5=5x
x=-10

Answer Link

Otras preguntas

Which would be considered a way to publish your work? sending a letter to a family member writing in a private diary making a list of personal goals answering v

Don’t make such a ....................! The dentist is only going to look at your teeth.

What is the value of (1/8)^-1/3PLEASE I NEED THE AWNSER QUICK PLEASE AND TY

change 12' 8" to decimal degree equivalent. express the decimal to the nearest ten-thousandths

Which sentence has an underlined word that means "leave”? During a fire drill, we evacuate the building. The ants invade our picnic and eat our food. The trains

HELP ASAP Which of the following best describes the state of ecology and environmental science prior to 1960? It was relatively non-existent, and most scientist

Which of these is likely the smallest contributor to productivity and economic growth? an increase in the labor force participation rate a large increase in lab

5. The burning of fossil fuels has increased the carbon dioxide content of the atmosphere. What is a possible effect that the increased amount of carbon dioxide

What two assertions of Thomas Jefferson helped James Madison change his mind about the need for a Bill of Rights?

I saw this in a newspaper – it was a puzzle for adults, fully grown humans, but I think you will find it easy.All the digits from 1 to 9 are used in this grid,