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Natali [406]
3 years ago
12

X+y=2 và x-y=4 tim x và y

Mathematics
1 answer:
sdas [7]3 years ago
4 0

Step-by-step explanation:

X

xx - xxyy  - yy = 8

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I need help with number 4
Tju [1.3M]
So you first want to move all variables to one side.

2x = 1/8 + 4x

So perform the opposite of each operation to move it.

2x - 4x = 1/8 + 4x - 4x

-2x = 1/8

And then just divide both sides by -2

-2x / -2 = 1/8 / -2

x = -1/16
8 0
3 years ago
Help!!! How do you solve problems like these anyway? <br><br> Answers would help too
Zanzabum

3.Slope: 10 Y int: 5

4. Slope: 5 Y int: 10

6.Slope: 1/3 Y int: 3.5

7.Slope: 4/3 Y int: -1

8.Slope: 2/-4 Y int: -1

The way you do this is the Y int is where the line crosses through the y-axis. Finding the slope is finding the rise over run (y/x). It's easy to find when you know how to.

Use 4. as an example. Start where at (-3,-5) or (-2,0). Each 'rise' up 5 and 'runs' one block over, giving you the slope of 5/1 or 5 simplified.

7 is harder, but start at (-3,-5). It 'rises' up 4, then 'runs' 3, also giving you the y int, as it crosses the axis. As the rise is 4 and run is 3, it creates the slope 4/3.

4 0
3 years ago
PLEASE HELP I REALLY NEED A GOOD GRADE
Slav-nsk [51]

Answer:

For #2 "Parallel" For #3  "Infinitely many"

Step-by-step explanation:

3 0
3 years ago
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A medical office is replacing their existing flooring with carpeting in the waiting and office areas and laminate flooring in th
Dmitrij [34]
So first, you would multiply 10 times 10 to get 100 square feet. And since there are 10 exam rooms, you multiply 100 to 10 and you would get 1000. Then to calculate the waiting area, you multiply 20 times 15 to get 300 square feet. Then the office area would be 25 times 20 which is 500. So you would add up 1000+300+500. The answer comes out as 1800 square feet. Hope this helped! Good luck!
3 0
3 years ago
David plays baseball 18 times each month for 3 months. He also plays soccer 15 times each month for 3 months. How many more time
lakkis [162]

Answer:

3

Step-by-step explanation:

,......m.......

... .........

3 0
3 years ago
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