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iragen [17]
3 years ago
7

30 POINTS!! Will give brainliest What is ​ BC ​ ? Enter your answer in the box. units

Mathematics
2 answers:
andreev551 [17]3 years ago
6 0

Answer:

The answer would be - BC is 25

Step-by-step explanation:

  • Sides ab and ac are equal
  • 4 x + 1 = 2x +23
  • then after that you subtract 2 times from every side
  • 2x + 1 = 23
  • Then 1 more time from every side
  • 2x =22
  • Then divide by 2 on each side of the Triangle
  • x =11
  • BC = 3x -8
  • After you do all of this then you would sub. the  value of x
  • So BC = 3*11 -> 33 -8
Gemiola [76]3 years ago
4 0

Answer:

BC=25

Step-by-step explanation:

this is an isosceles  triangle, so sides AB and sides AC are equal

AB = AC

4x+1 = 2x+23

subtract 2x from each side

2x+1 = 23

subtract 1 from each side

2x =22

divide by 2 on each side

x =11

BC = 3x-8

substitute the value of x

BC = 3*11 -8

BC = 33 -8

BC=25


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n200080 [17]

Answer:

x=9.5, y=5.75

Step-by-step explanation:

2x-5=14, 3x+2y=40

focus on 2x-5=14 first:

2x-5=14 (add 5 to both sides) 2x=19(divide both sides by 2) x=9.5

Now subtitute x into the second equation and find y:

3(9.5)+2y=40(simplify) 28.5+2y=40(subtract 28.5 on both sides) 2y=11.5(divide both sides by 2) y=5.75

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3 years ago
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Answer:  New Mean = $40,920

                New Median = $38,500

<u>Step-by-step explanation:</u>

5 employee's salaries are as follows in order from least to greatest:

       $32,000 - unknown - $38,500 - unknown - unknown

The median (middle number) is: $38,500

The mean (average) of the 5 salaries is: $40,300

If $3,100 is added to the $32,000 salary, then the mean(average) is increased by \dfrac{\$3100}{5\ salaries}=\$620.

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8 0
3 years ago
A cone has a radius of 1.2 and a height of 2.9 inches. What is the volume, to the nearest tenth of a cubic inch, of the cone?. E
Mademuasel [1]

Answer:

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Step-by-step explanation:

From the question;

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  • Height of the cone is 2.9 inches

We are required to determine the volume of a cone;

Volume of a cone is given by the formula;

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Thus, the volume of a cone is 4.4 cubic inches

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julia-pushkina [17]

Answer:

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The mean of the numbers 5,15,15,7,20,15
agasfer [191]
Answer: 12.83

Explanation:

The mean is the average of a data set. So, in order to find the mean, we have to add all he values and in this case, we got 77. Then we divide 77 by he number of values we have, which results in 12.83. Therefore, the mean of these numbers are 12.83.
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