milliefarrell1 milliefarrell1
  • 04-02-2015
  • Mathematics
contestada

3x+2y=4
4x+5y=17
What is the value of x and y?

Respuesta :

eu99li
eu99li eu99li
  • 04-02-2015
{3x+2y=4    /*5
{4x+5y=17    /*(-2)

{15x+10y=20
{-8x-10y=-34        (+)
7x=-14
x=-2

15x+10y=20
15*(-2)+10y=20
-30+10y=20
10y=50
y=5

Answer Link
konrad509
konrad509 konrad509
  • 04-02-2015
[tex]3x+2y=4|\cdot(-4)\\ 4x+5y=17|\cdot 3\\\\ -12x-8y=-16\\ \underline{12x+15y=51}\\ 7y=35\\ y=5\\\\ 3x+2\cdot5=4\\ 3x+10=4\\ 3x=-6\\ x=-2\\\\ \boxed{(x,y)=(-2,5)}[/tex]
Answer Link

Otras preguntas

After doing these calculations, amadi realizes he needs to save at least $278.71 each month. he carefully examines his monthly budget. he decides if he is caref
What is one way u. S. Citizens can use their rights to help govern their country?.
What is a requirement of the data in order for us to be allowed to control for individual variability?.
Which of the provides a cloud-based platform for running websites and databases and executing programming languages?.
Can you explain how to do parent functions
Question 3 of 10 The term "rising action" best describes which narrative element? A. Point of view B. Character C. Plot D. Conflict
In a typical heating/cooling curve, what is the slope of the line when a change of state is occurring?.
What would it mean if a trait develops from both genetic and environmental effects?.
10) Which best describes the end of the war in Europe?
A _____________ team is made up of employees from the same hierarchical level but different work areas. They are typically brought together to accomplish a task