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kow [346]
3 years ago
7

When evaluating an observational study, the four factors that should be reviewed are

Mathematics
1 answer:
Zinaida [17]3 years ago
7 0
They are
1. Background
2. Methods
3. Results
4. Conclusions
Hope this helped
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Solve the system of equations - x - y = 6 and 5x -7y=66 by combining the equations
DIA [1.3K]

Answer: Let's solve for x.

−x−y=6

Step 1: Add y to both sides.

−x−y+y=6+y

−x=y+6

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−x

−1

=

y+6

−1

x=−y−6

Answer:

x=−y−6

Let's solve for x.

5x−7y=66

Step 1: Add 7y to both sides.

5x−7y+7y=66+7y

5x=7y+66

Step 2: Divide both sides by 5.

5x

5

=

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5

x=

7

5

y+

66

5

Answer:

x=

7

5

y+

66

5

Step-by-step explanation:

7 0
2 years ago
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