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natima [27]
3 years ago
6

Can someone solve the system of equations?

Mathematics
1 answer:
kogti [31]3 years ago
5 0
Y=x^2-5

y=2x-5
y+5=2x
x=(y+5)/2

y=((y+5)/2)^2-5
y=(y^2+10y+25)/4-5
4y=y^2+10y+25-20
0=y^2+6y+5
0=(y+5)(y+1)
y= -5 or -1

y=2x-5   (y= -5 doesn't work for this one so use -1)
-1=2x-5
2x=4
x=2

Using these answers, you can choose answer D with reasonable certainty.
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Step-by-step explanation:

It is given that,

y = 3x-5 ....(1)

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We can solve the above equations using substitution method. Put the value of y from equation (1) to equation (2) such that,

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It means that the value of x is \dfrac{9}{4} and the value of y is \dfrac{7}{4}. Hence, the given equations has only one solution.

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