04-04-2014
Mathematics

contestada

If 2x+z=2y and 2x+2y+z=20 what is the value of y?

Respuesta :

Аноним Аноним

05-04-2014

[tex]2x+z=2y\to2x=2y-z\\\\substitute\ to\ 2x+2y+z=20:\\\\(2y-z)+2y+z=20\\2y-z+2y+z=20\\4y=20\ \ \ \ /:4\\y=5\to answer[/tex]

Answer Link

Otras preguntas

how many calories of heat energy are required to raise the temperature of 6 grams of water from 10 degrees celcius to 15 degrees celcius

7. Where did slaves have harder lives?

What is one theme found in Walt Whitman's "I Hear America Singing"?

Please show work!! Evaluate f(x)=-2+7 when f=4

20 points !!! What are the answer and explain for both questions?!

The following steps describe the process in which psychological theories are developed. Arrange these steps in proper order. data examination data collection

how were the lives of slaves different from the lives of free black in the middle 1800s ?

In his article, John Schwartz presents the reasoning that wastewater recycling has a public perception challenge to overcome. Which piece of evidence sufficient

What is the maximum slope to f(x)= e^(-x^2)? (What's max. slope?) a. (sqrt2)/2 b. -(sqrt2)/2 c. -sqrt(2/e) d. sqrt(2/e)?

cylinder and a cone have the same diameter: 8 inches. The height of the cylinder is 5 inches. The height of the cone is 15 inches. Use pi = 3.14. What is the r