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dlinn [17]
2 years ago
8

2 Solve for a. 5 a = √ [?] a = Pythagorean Theorem: a² + b2 = c²

Mathematics
2 answers:
yuradex [85]2 years ago
4 0

Answer:

a  =  \sqrt{21}

Step-by-step explanation:

  • Pythagorean theorem
  • \sqrt{a ^{2}  + b ^{2}   }  = c \\  \sqrt{c ^{2} - b ^{2}  }  = a
  • \sqrt{5 ^{2} - 2 ^{2}  }  =  \sqrt{21}
Crazy boy [7]2 years ago
3 0
<h2>Answer:</h2>

  • \sqrt{21}

<h2>Step-by-step explanation:</h2>

<h3><u>Given</u> :</h3>

b = 2

c = 5

<h3><u>To Find</u>:</h3>

a = ?

<h3><u>Solve</u>:</h3>

By using Pythagoras Theorem :

  • a² + b² = c²

Putting the values :

  • a² + 2² = 5²
  • a² + 4 = 25
  • a² = 25 - 4
  • a² = 21
  • a \: =  \:  \sqrt{21}
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Answer:

40

Step-by-step explanation:

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3 years ago
the angle of elevation of the top of a tower from a certain point is 30 . if the observer moves 20m towords the tower, the angle
castortr0y [4]
The <span>height of the tower. is  27 m

Now, we write h/x = tan 45
i.e h/x = 1 
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or (x+20) = 1.73h
or from equation 1 , 
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3 years ago
For which values of x is the expression undefined?<br> x2 – 49<br> x2 – 16
Lyrx [107]

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Set each factor to 0 and solve for x individually.

x - 7 = 0

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x + 7 = 0

x = -7

Do the same for x^2 - 16.

Here is the set up:

x^2 - 16 = (x - 4) (x + 4).

Take it from here.

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attashe74 [19]

Answer:

The mean and SD will change

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Step-by-step explanation:

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aleksandrvk [35]
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