SerenitysMommy
Which of the graphs below represent the graphical solution to the following system of equations?
4x + y = 5
3x – 7y = 27
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amistre64
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|dw:1323884953333:dw|
SerenitysMommy
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Whats the points ?
SerenitysMommy
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And non of my graphs show close to looking like that =/
amistre64
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itd be better if we could see your graphs since this thing isnt actually a precise rendition :)
JoãoVitorMC
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|dw:1323885260622:dw|
amistre64
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that one might work :)
SerenitysMommy
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I will try and drawl my answer choices
JoãoVitorMC
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you need the point of intersection?
amistre64
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SerenitysMommy
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I have a answer choice that shows that!!! How'd you get the answer
JoãoVitorMC
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so you need the intersection, i will calc and show here
amistre64
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you draw the line and see where they cross ....
SerenitysMommy
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How do you know what line to drawl?
amistre64
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the x and y values are from the equations that are given
SerenitysMommy
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? Explain? Im looking at the numbers and not getting how you draw them
amistre64
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4x + y = 5
when x=0. y=? (0,y)
4(0) + y = 5
0 + y = 5
y = 5 (0,5)
when y = 0 x = ? (x,0)
4x + y = 5
4x + 0 = 5
4x = 5
x = 5/4 (5/4 , 0)
plot the points, and since they are lines ... conect the dots
amistre64
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then work the other line in the same way
SerenitysMommy
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Ohhhhhhh.
amistre64
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any 2 points will work, just have to find them. x=0 the y=0 tends to be the easiest way tho
JoãoVitorMC
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\[y = -4x +5\]\[3x -7y=27\]\[3x -7(-4x +5)=27\]\[x =2\]\[y =-4(2)+5\]\[y = \]\[P(2, -3)\]