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harina [27]
2 years ago
7

Don't give wrong answer! Now help me :)

Mathematics
1 answer:
Mnenie [13.5K]2 years ago
7 0

Yes.

Ab = cd and bc = ad

Using SAS postulate triangles formed by ABC = abd

Opposite sides are equal and each angle is 90 degrees so by definition it is a rectangle.

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3 0
3 years ago
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Distribution with a mean of 100 and standard deviation of 15...
anzhelika [568]
Use the z-score:
                                      112 - 100
For 112, the z-score is --------------- = 12/15, or 0.8.  
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Next, find the AREA under the standard normal curve TO THE LEFT OF 0.8.

Use either a z-score table or a calculator for this purpose.

Using my calculator, I found that this area is 0.532.  That places 112 in the 53rd percentile.

82 would be in a lower percentile:  the 12th percentile.

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8 0
3 years ago
three less than a triple number is the same as the number plus 57. What is the number ? help i would appreciate it =)
RoseWind [281]

Answer:

Y x 3 - 3 = Y + 57

30 would be your answer

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30 x 3 = 90-3=87

30 + 57 = 87

Hope this helps (I am twelve and I know how to do this)

Step-by-step explanation:

5 0
3 years ago
I do not know how to solve this please help
oksano4ka [1.4K]
You multiply the denominator on one side of the equation by the numerator and vice versa. So for example(S)I'm going to multiply 4 by nine and 3 times n. Then that comes out to 3n=36. After you multiply, you divide from both sides to get the variable by itself. So you would divide both sides by 3 and you're final answer would be n=13. Hope this helped!
8 0
3 years ago
How can you getell to know fractions really quickly in a very easy way? Plz help get this answered soon. :)
cupoosta [38]
You just study alot and do questions on fractions
4 0
3 years ago
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