anonymous
  • anonymous
What is the solution to the 2 equations? 3x - 5y = 11 2x + 4y = 9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
so technically r both equations x and y the same number?
anonymous
  • anonymous
Im not sure
anonymous
  • anonymous
ok

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anonymous
  • anonymous
this is hard. just plug in numbers that equal to it
whpalmer4
  • whpalmer4
Yes, the solution to the system of equations will have the same value for \(x\) in both, and the same value for \(y\) in both.
anonymous
  • anonymous
i will leave then
anonymous
  • anonymous
I have to graph them and then find the solution but Im having a hard time graphing it
whpalmer4
  • whpalmer4
If you graph both equations, you will get two straight lines (though one may be on top of the other), and if they intersect, the point of intersection is the solution.
mathmale
  • mathmale
@yuna123, I know you'd like to help, and appreciate that, but your comments so far have been off the wall. Please suggest methods such as substitution, elimination, graphing, and so on, methods that truly succeed.
whpalmer4
  • whpalmer4
My easy approach to graphing lines: put \(x=0\) solve for value of \(y\). Put a point at \(0,y\). Put \(y=0\), solve for value of \(x\). Point a point at \(x,0\). Draw a straight line through the points. Done.
anonymous
  • anonymous
My teacher has only given me a graph that shows quadrant 1
whpalmer4
  • whpalmer4
Does it show the two lines?
anonymous
  • anonymous
whpalmer4
  • whpalmer4
Ah, no, I guess you are supposed to use that as graph paper.
anonymous
  • anonymous
My question says Write the equations in slope intercept form. Graph the pair of linear equations. Use the graph to estimate the solution to the system of equations.
whpalmer4
  • whpalmer4
Okay, helpful if you provide all the info up front. Slope-intercept form is \[y = mx + b\]where \(m\) is the slope and \(b\) is the \(y\)-intercept. To put your equations in this form, just solve them for \(y\) alone on the left side of the \(=\).
anonymous
  • anonymous
3x - 5y = 11 would be y = 0.6x - 2.2? and 2x + 4y = 9 would be y = -0.5x + 2.25?
whpalmer4
  • whpalmer4
I would keep them as fractions, personally, but those appear correct.
anonymous
  • anonymous
So then they would be y = -2/4x + 2.25? y = -3/5x - 2.2?
anonymous
  • anonymous
There is no solution then...
denisaboichuk
  • denisaboichuk
y=25
whpalmer4
  • whpalmer4
No, I wouldn't use any decimals whatsoever. \[3x - 5y = 11\]\[ 2x + 4y = 9\] \[3x-5y = 11\]\[5y = 3x-11\]\[y = \frac{3}{5}x-\frac{11}{5}\] \[2x+4y=9\]\[4y = -2x+9\]\[y = -\frac{1}{2}x+\frac{9}4\] Those lines have different slopes, so there most definitely IS a solution. @denisaboichuk that is not it.

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