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Mnenie [13.5K]
3 years ago
15

Y=-3x+5 5x - 4y= -3 solvining systems of equations by substitution

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
4 0
\left\{\begin{array}{ccc}y=-3x+5\\5x-4y=-3\end{array}\right\\\\\\substitute\\\\5x-4(-3x+5)=-3\\5x+12x-20=-3\\17x-20=-3\\17x=-3+20\\17x=17\ \ \ \ /:17\\x=1\\\\y=-3\cdot1+5=-3+5=2\\\\  \left\{\begin{array}{ccc}x=1\\y=2\end{array}\right
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reflect (7,4) across the x-axis then reflect the result across the y-axis what are the coordinates of the final point
Andrews [41]

The coordinates of the final point after the two reflections is (-7, -4)

<h3>How to reflect a point across an axis?</h3>

For a point (x, y), a reflection across the x-axis gives the point (x, -y), while for a point (x, y) a reflection across the y-axis gives (-x, y).

In this case, we have the point (7, 4), first we reflect across the x-axis, so we get the point (-7, 4).

Now we reflect across the y-axis, so the sign of the y-component changes, and we get (-7, -4)

So the coordinates of the final point after the two reflections is (-7, -4).

If you want to learn more about reflections, you can read:

brainly.com/question/4289712

8 0
2 years ago
Quick first one gets brainliest
Free_Kalibri [48]

c is there answer                                                                                                  Step-by-step explanation: 4 is greater than 3  and because the  aligator eats the biggest number lol

5 0
2 years ago
Which expression is equivalent to 7y + 7y?<br> 49y<br> 14y<br> 14 + 2y<br> 7y2
Andre45 [30]
14y is the answer :)
6 0
3 years ago
Read 2 more answers
Pleaseeeeeee help verrrrryyyyy confuseddddddd on #3
Dmitriy789 [7]
X (adult)= 130 
y (child)= 392
(hope you can see it...)

5 0
3 years ago
If 3a + b + c = -3, a+3b+c = 9, a+b+3c = 19 find a*b*c
VashaNatasha [74]

Answer:

a=-4

b=2

c=7

so therefore a*b*c=-4*2*7

5 0
2 years ago
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