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velikii [3]
3 years ago
12

50% of a certain number is 39. What is the number?

Mathematics
1 answer:
Allushta [10]3 years ago
8 0
Let that certain number be 'n'

50% (n) = 39

50% ⇒ 0.5

0.5 (n) = 39

Divide both sides by 0.5

0.5n = 39
 /0.5    /0.5

n = 78.

So that certain number is actually <em><u>78! :)</u></em>

CROSS CHECK:

50% of 78

0.5 × 78

= 39

Hope this helps! :)
 
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HELP HURRY pls
Bess [88]

Please see the explanation of this question to see procedure for the dilation of the triangle ABC and the image attached below to know the result.

<h3>How to generated a resulting triangle by transformation rules</h3>

In this question we must apply a kind of <em>rigid</em> transformation known as dilation. A dilation of a point around a point of reference is defined by the following operation:

P'(x, y) = O(x, y) + k · [P(x, y) - O(x, y)]     (1)

Where:

  • O(x, y) - Point of reference
  • k - Dilation factor
  • P(x, y) - Original point
  • P'(x, y) - Resulting point

Let assume that the point P is the origin of a <em>rectangular</em> system of coordinates. Then, the coordinates of the three vertices of the triangle ABC respect to the origin are: A(x, y) = (- 1, 2), B(x, y) = (- 1, - 1), C(x, y) = (2, 0).

Then, the vertices of the resulting triangle A'B'C' are, respectively:

A'(x, y) = (0, 0) + 3 · [(- 1, 2) - (0, 0)]

A'(x, y) = (- 3, 6)

B'(x, y) = (0, 0) + 3 · [(- 1, - 1) - (0, 0)]

B'(x, y) = (- 3, - 3)

C'(x, y) = (0, 0) + 3 · [(2, 0) - (0, 0)]

C'(x, y) = (6, 0)

Finally, we draw the resulting triangle with the help of a graphing tool.

To learn more on dilations: brainly.com/question/13176891

#SPJ1

7 0
2 years ago
Which number is the product?<br><br> 2x5=10<br><br> A.10<br> B.5<br> C.2
Lera25 [3.4K]

10 is the product........



6 0
3 years ago
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each year the drama team holds a "lunchtime" fundraiser. Last year the team sold 10 chili dogs for every 12 corn dogs they sold.
Dvinal [7]

Answer:

70

Step-by-step explanation:

7*12=84 10:12 chili dogs 10*7=70

4 0
3 years ago
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One edge of a cube measures 3.4 meters. What is the volume of the cube? Enter your answer, as a decimal, in the box.
alina1380 [7]

The formula to find the volume multiplies the length by the width by the height.A cube has all edges the same length .If we multiply the edges three times we get the volume of any cube.

Volume of cube with sides a is Volume V= a^{3}

In the question the cube is having an edge of 3.4 meters

Volume V= 3.4^{3} =(3.4)(3.4)(3.4)=39.3

Volume of cube is 39.3 cubic meters.

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3 years ago
Which sentence best describes the interval [-2,1]
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Answer:

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Step-by-step explanation:

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