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svp [43]
4 years ago
9

If you can answer this you are a true genius!

Mathematics
1 answer:
Flauer [41]4 years ago
7 0
x= -2
because 
y = 1/2x +4
                -y = 2x +1
                 0 = 5/2x + 5
                    -5 = 5/2x
                       x = -2
Hopes this loves.
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Solve system of linear equation by substitution -x+y=2; 3x-5y=-4
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Answer:

(-3,-1)

Step-by-step explanation:

-x+y=2

3x-5y=-4

in the top equation, we can get y by itself on one side of the equation:

-x+y=2

y=x+2

now, since we know that y=x+2, in the bottom equation we can substitute x+2 for y (substitution method) and solve:

3x-5y=-4

3x-5(x+2)=-4

3x-5x-10=-4

-2x-10=-4

-2x=6

x=-3

since we now know that x=-3, we can use it to find y by plugging in -3 for x in the top equation (you can do it in either equation, but doing it in the top equation is easier):

y=x+2

y=-3+2

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answer: (-3, -1)

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3 years ago
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Romashka [77]
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Anna71 [15]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
What is the distance between (4,7) and (2,2)?
algol [13]
\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ 4}}\quad ,&{{ 7}})\quad 
%  (c,d)
&({{ 2}}\quad ,&{{ 2}})
\end{array}\qquad 
%  distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
\\\\\\
d=\sqrt{(2-4)^2+(2-7)^2}\implies d=\sqrt{(-2)^2+(-5)^2}
\\\\\\
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3 years ago
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inessss [21]

Answer:

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Step-by-step explanation:

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3 years ago
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