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Vadim26 [7]
3 years ago
11

Somebody please help me

Mathematics
1 answer:
Fed [463]3 years ago
6 0
Which one. All of them?
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Find the solution of the system of equations.<br> -2x - 9y = -3<br> --7x - 9y = -33
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Answer:

x = 6 and y = -1

Step-by-step explanation:

hope this helps

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3 years ago
Which are the solutions of the quadratic equation x^2=-5x-3
frutty [35]
The correct answer would be \frac{-5 +/-  \sqrt{13} }{2}

In order to solve for this you must first get the equation equal to 0. 

<span>x^2=-5x-3 ----> add 5x to both sides. 
x^2 + 5x = -3 ----> add 3 to both sides.
x^2 + 5x + 3 = 0

Now knowing this we can use the coefficients of each one in descending order of power as a, b and c. 

a = 1 (because it is the coefficient to x^2)
b = 5</span> (because it is the coefficient to x)
c = 3 (because it is the end number)

Now we can plug these values into the quadratic equation. 

\frac{-b +/-  \sqrt{b^{2} - 4ac } }{2a}

\frac{-5 +/- \sqrt{5^{2} - 4(3)(1) } }{2(1)}

\frac{-5 +/- \sqrt{13} }{2}

And those would be your two answers.
5 0
3 years ago
Andrew walked 3/4 mile in 10 minutes
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4 years ago
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