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masya89 [10]
3 years ago
12

In a trapezoid ABCD with legs AB and CD , the diagonals intersect each other at point O. Compare the areas of △ABD and △ACD

Mathematics
2 answers:
Feliz [49]3 years ago
4 0

Answer:

The area of △ABD and △ACD are equal.

Step-by-step explanation:

Triangles lying   on same base and between same parallels are equal in area .

In a trapezoid the opposite sides are parallel.The legs of the trapezoid are AB and CD.The triangles △ABD and △ACD are having the same base AD and are lying between the same parallel lines AB and CD,so they are w=equal in area.

iris [78.8K]3 years ago
3 0

Answer with explanation:

In Trapezoid A B CD, having legs AB and CD. it is also given that Diagonals AC and B D intersect each other at O.

In a trapezium one pair of Opposite sides are parallel.

That is , AD ║ BC.

→→Area(ΔABD)=Area(ΔACD)

→Triangles on the same base and between the same parallel are equal in area.

→AD, is the same base of two triangles ,△A B D and △A CD and AD ║ BC.

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Answer:

  a = (4/3)(y+g)

Step-by-step explanation:

Isolate 'a' term, then multiply by the reciprocal of its coefficient.

  -g+\dfrac{3}{4}a=y\qquad\text{given}\\\\\dfrac{3}{4}a=y+g\qquad\text{add $g$}\\\\\boxed{a=\dfrac{4(y+g)}{3}}\qquad\text{multiply by $4/3$}

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4 years ago
A sample of 900 computer chips revealed that 75% of the chips do not fail in the first 1000 hours of their use. The company's pr
Vaselesa [24]

Answer:

No the evidence is not sufficient

Step-by-step explanation:

From the question we are told that

    The  sample  size is  n  =  900

   The  sample  proportion is  \r p  = 0.75

    The  population proportion is  p  = 0.72

The  Null hypothesis is

   H_o  : p =  0.72

The  Alternative  hypothesis is

   H_a  :  p > 0.72

The level of significance is given as  \alpha  = 0.05

The critical value for the level of significance is  t_{\alpha }  =  1.645

 Now the test statistic is mathematically evaluated as

          t =  \frac{\r p -  p }{ \sqrt{\frac{p(1-p)}{\sqrt{n} } } }

substituting values

        t =  \frac{ 0.75 -  0.72 }{ \sqrt{\frac{0.72 (1-0.72)}{\sqrt{900} } } }

        t =  0.366

Since the critical value is  greater than the test statistics then the Null hypothesis is rejected which there is no sufficient evidence to support the claim

       

 

8 0
4 years ago
A normal distribution has a mean of 50 and a standard deviation of 10. What is
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Answer:

A normal distribution has a mean of 50 and a standard deviation of 10. What is

the probability of selecting a number between 20 and 60?

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3 years ago
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Tamiku [17]

Answer:

25x⁴y⁶

Step-by-step explanation:

From what I understand your question looks like this

(5x²y³)²

To solve this just mulitply

5x²y³*5x²y³

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5 0
3 years ago
Help ASAP please!!!!
RoseWind [281]

Answer:

There are 327,811 doctors.

Step-by-step explanation:

Percentage of female doctors = 16.9%

Number of female doctors = 55,400

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100% represents total number of doctors.

⇒\frac{55,400}{16.9} \times100

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Number of doctors has to be a whole number so we rounf off the number to nearest whole number:

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