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seropon [69]
3 years ago
12

A 5 foot board rests under a doorknob and the base of the board is 3.5 feet away from the

Mathematics
1 answer:
Alex17521 [72]3 years ago
5 0

Answer: 3.57

Step-by-step explanation:

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10
ikadub [295]

Answer:

OD)  4.9 units, 14.2 units

<em> The lengths of the legs of a right triangle</em>

<em>   </em>a = 4.9units , b = 14.2units and hypotenuse 'c' = 15

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that the Acute angle is 19°

And hypotenuse (AC ) = c= 15

We will take cos∝ = = \frac{adjacent side}{hypotenuse}

          ⇒  cos19 = \frac{BC}{15}

        ⇒  BC = 15 × cos 19°

        ⇒ BC  = 15 ×0.9455

       ⇒ BC = 14.18

The length of the one leg of the right angle triangle

          BC = b = 14.18≅ 14.2

We know that ΔABC is a right angle triangle

       c^{2} = a^{2} + b^{2}

     a² = c² - b²

         = 15² - (14.18)²

        = 225 - 201.07

       = 23.93

   a² = 23.93

  a = √23.93 = 4.89≅4.9

<u><em>Final answer:-</em></u>

<em> The lengths of the legs of a right triangle</em>

<em>        </em>a = 4.9units , b = 14.2units and hypotenuse 'c' = 15

3 0
3 years ago
What is the slope of this line? <br> A.) −1/2<br> B.) 1/2<br> C.) 2<br> D.) I don't know.
gregori [183]

Answer:

2

Step-by-step explanation:

8 0
3 years ago
Please help!!!
Kay [80]

Answer:3.125

Step-by-step explanation: You have to divide 28 by 8

8 0
3 years ago
Round off 1.0246 to 1 decimal to decimal 2 decimal
Anettt [7]

Answer:

1.0

Step-by-step explanation:

4 0
3 years ago
Evaluate each expression using the order of operations (4-7)^2-6(7)+20
LekaFEV [45]

The anwser would be -13

Step-by-step explanation:

PARENTHESIS

EXPONENTS

MULTIPLICATION

DIVISION

ADDITION

SUBTRACTION

3 0
3 years ago
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