3 years ago

HELPPPP PLSSS I WILL MARK BRAINLYEST

Mathematics

1 answer:

Zina [86]3 years ago

4 0

Answer:

Step-by-step explanation:

hope this helps!!

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Rewrite the equation 4x - 5y = 20 into slope-intercept form and graph it.

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3 years ago

The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +

lianna [129]

You have a system of equations $\left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right.$ .

1. Substitude right side of second equation into the left side of the first equation: $-6x+6=-x^2+2x-9$ .

2. Solve this equation:
$x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4, \\ \sqrt{D}=2, \\ x_{1,2}=\dfrac{8\pm 2}{2 } =3,5$ .

3. Find y:
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4. The solutions of the system are: (3,-12) and (5,-24).
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3 years ago

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is there a picture or a link or anything??

Step-by-step explanation:

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3 years ago

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