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snow_tiger [21]
3 years ago
5

Solve the equations -9x + 2y = 23 and -4x - y = -3

Mathematics
2 answers:
Ira Lisetskai [31]3 years ago
8 0

Answer:

(-1,7)

Step-by-step explanation:

-9x + 2y = 23

-4x - y = -3

multiplying equation 2 by 2

-9x + 2y = 23

-8x - 2y = -6

adding the two equation to cancel out y

-17x = 17

x = -1

plugging back x = -1 into the second equation

4 - y = -3

-y = -7

y = 7

Talja [164]3 years ago
3 0

Answer:

y=7

x= -1

Step-by-step explanation:

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Step-by-step explanation:

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Divide the first number the second. For instance, if you want to find what percentage 43 is out of 57, divide 43 by 57 to get 0.754386.

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3 years ago
The width of a rectangle is 8 units less than the length. If the area is 153 square units, then find the dimensions of the recta
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3 years ago
Work out 3√−64<br> the 3 is small ( cubed )
Alekssandra [29.7K]

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7 0
3 years ago
Help me in number 3!!!
Alecsey [184]
Answer: G

Explanation/Calculation:

You can clearly see that the white shapes are positive while the black shapes are negative. You can determine this because all (except F) claim that the 6 shapes are negative.

To make it easier, use elimination. It's definitely not J because you are not subtracting -6, but adding (as seen in the equation.) It is not F because 2(3)=6 when the equation needs -6.

So it is either G or H...

H claims that 12x+3+(-6) is what the model symbolizes; but this is incorrect. Unless x is a decimal, you can not have the large shape as the "purest" form (so to speak.) The "purest" state you can go in this model is a cube/square which=1.

Therefore, "G Jamey modeled 12 + 3x + (-6) and it is equivalent to 12x-3" is the correct answer.

Hope this helps you!
8 0
3 years ago
Line CD contains points C(7, 4) and D(6, 1). Line JK is parallel to line CD. Which two points lie on line JK?
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We can determine the slope of the line
rise/run
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6 0
3 years ago
Read 2 more answers
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