what are the cordinates for 3x+4y=16 and y=3x+11?

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what are the cordinates for 3x+4y=16 and y=3x+11?

what are the cordinates for 3x+4y=16 and y=3x+11??

2006-06-30 01:00:36 · 4 answers · asked by Mathe Geek 1 in Science & Mathematics ➔ Mathematics

4 answers

We have 3X+4Y = 16 (1)
Y - 3X = 11 (2)

Adding (1) and (2)

Y + 4Y = 27

or

5Y = 27 --> Y = 27/5 = 5 + 2/5 = 5.4

replacing in (2)

27/5 - 3X = 11

therefore

X = (11-5.4)/(-3) = -5.6/3

2006-06-30 01:11:10 · answer #1 · answered by mbszoychen 2 · 0⤊ 0⤋

3x+4y = 16
3x- y = -11
when subtracting

ie 5y= 27
than y = 5.4
tha x = -1.83

2006-06-30 08:11:57 · answer #2 · answered by PRAKASH 1 · 0⤊ 0⤋

x = -28/15
y = 27/5

2006-06-30 08:06:30 · answer #3 · answered by cas 3 · 0⤊ 0⤋

they intersect at a point (-1.87,5.4)

2006-06-30 08:06:14 · answer #4 · answered by Thava 1 · 0⤊ 0⤋