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2 years ago

2x + 3y = -9 -x + 4y = 10 Solve the system

Mathematics

1 answer:

Vladimir79 [104]2 years ago

4 0

Answer:

x = -6

y= 1

Step-by-step explanation:

make one of the variables equal to each other

4(2x+3y) = -9

3(-x+4y) = 10

subtract

8x+12y = -36

- -3x+12y =30

----------------------

11x = -66

x = -6

plug back in to find y

8(-6)+12y = -36

12y= 12

y = 1

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3 years ago

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Step-by-step explanation:

Megan's equation is given as y=8x, where x is the number of bags, and y the number of cookies:

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3 years ago

Which graph represents the solution set of the system of inequalities?

lidiya [134]

$y < \dfrac{2}{3}x\\\\y=\dfrac{2}{3}x\\\\for\ x=0\to y=\dfrac{2}{3}(0)=0\to(0,\ 0)\\\\for\ x=3\to y=\dfrac{2}{3}(3)=2\to(3,\ 2)\\\\y\geq-x+2\\\\y=-x+2\\\\for\ x=0\to y=-0+2=2\to(0,\ 2)\\\\for\ x=2\to y=-2+2=0\to(2,\ 0)$

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the dotted line. shadow under the line

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solid line. shadow above the line

Answer in the attachment (graph C).

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2 years ago