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emmainna [20.7K]
2 years ago
15

Plz help me with all of this question here and explain how was the incorrect answer obtained

Mathematics
1 answer:
larisa [96]2 years ago
4 0

Answer:

1.) 9

2.) 20

Step-by-step explanation:

1.) 39 is incorrect because they didn't follow the PEMDAS rule.

They subtracted 2 from 15 which is 13, and then they multiplied 13 by 3.

<u>The correct way is to multiply 2 times 3 which is 6, and then subtract 6 from 15 which is 9.</u>

<u />

2.) 12 is incorrect because they didn't use PEMDAS.

They added 8 to 16 which is 24, and then divided 24 by 2.

<u>The correct way is to divide 8 by 2 which is 4, and then add for to 16 which 20.</u>

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LekaFEV [45]

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Claire earned $60 babysitting on Friday night. She spent 1/4 of it at the movie, 1/3 going out to dinner, and she saved the rest
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3 years ago
Quadrilateral ABCD has the following vertices:
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Answer:

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Step-by-step explanation:

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_____

<em>Additional comment</em>

The midpoint of each diagonal is half the sum of the end point coordinates. That is, the midpoints are (0, 2)/2 = (0, 1). Since calculation of the midpoints requires both sums be divided by 2, we can tell the midpoints are the same if the sums are the same.

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3 years ago
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Since both equations are equal to y you can just make them equal to each other, like this 3x + 7 = x - 9. From there isolate the varible x on one side so that the solution will be on the other side of the equation. I'll do the steps too for you.

3x + 7 = x - 9

2x + 7 = -9

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x = -8

Hope this helps :)

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3 years ago
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