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podryga [215]
2 years ago
5

Solve the simultaneous equations 2x+3y=13 4x-y=-2

Mathematics
1 answer:
kherson [118]2 years ago
4 0
From eq1 ,
2x = 13-3y
x = 6.5-1.5y (eq 3)
sub eq 3 into eq2,
4(6.5-1.5y)-y=-2
26-6y-y=-2
-6y-y=-2-26
-7y=-28
7y=28
y=4 ( eq 4 )
sub eq4 into eq3 ,
x=6.5-1.5(4)
x=6.5-6
x=0.5


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114 - 108.5 = 5.5, 5.5^2 = 30.25
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Standard Deviation = 3.1573

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108.5 - 106.312 = 2.19
 

Margin of error = +/- 2.19



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