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Marizza181 [45]
2 years ago
5

2x + y = 3

Mathematics
1 answer:
kaheart [24]2 years ago
5 0

9514 1404 393

Answer:

  5y = 5

Step-by-step explanation:

  -2(x -2y) +(2x +y) = -2(-1) +(3) . . . . -2 times [eq2] + [eq1]

  -2x +4y +2x +y = 2 +3 . . . . eliminate parentheses

  5y = 5 . . . . . . . . collect terms

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When subtracting polynomials,distribute the negative sign,then add.
Doss [256]

Answer:

7m^2 - 11m - 2

Step-by-step explanation:

Subtract (-3m^2 + 10m + 4) from 4m^2 - m + 2:

  4m^2 - m + 2

- (-3m^2 + 10m + 4)   Now distribute the negative sign:

  4m^2 - m + 2

+ 3m^2 - 10m - 4

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

   7m^2 - 11m - 2 is the final answer.

5 0
3 years ago
The average of 100 measurements is 23 and the average of 50 additional measurements is 27.
Elden [556K]
Total value of 100 measurements
100 * 23
2300

Total value of additional 50 measurements
50 * 27
1350

Total value of 150 measurements
2300 + 1350
3650

Average of 150 measurements
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24.3

25 > 24.3

Answer is B
8 0
2 years ago
HELP!! 13 POINTS OFFERED
Anna [14]

Answer:

I believe its a vertical angle

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
What does the x equal
Mademuasel [1]
145° because 180-35=145
6 0
2 years ago
I thought it was the second one
lawyer [7]

the second one y=(2/3)x

4 0
2 years ago
Read 2 more answers
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