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PolarNik [594]
3 years ago
7

Tan 21 degrees = 9/x

Mathematics
1 answer:
REY [17]3 years ago
5 0

Answer:

23.4458015822

Step-by-step explanation:

tan(21) = 9/x

9/tan(21) = x

9/tan(21) = 23.4458015822

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School a rented 1 van and 3 buses with 89 students. School b rented 4vans and 3 buses with. 131 students. Each van and each bus
iogann1982 [59]

Answer:18

Step-by-step explanation:

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3 years ago
2,2,2,2,3,5,7,9,9,10,11,12,18 find the median​
Natasha2012 [34]

Answer:

median = 7

Step-by-step explanation:

The median is the middle value of the data set arranged in ascending order

2, 2, 2, 2, 3, 5, 7, 9, 9, 10, 11, 12, 18

                        ↑ middle value

median = 7

6 0
3 years ago
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Evaluate 2b^2-4a+4a^2 for a= 3 and b= -8
masha68 [24]
Given a = 3 and b = - 8 ,


= > 2b² - 4a + 4a²

= > 2( - 8 )² - 4( 3 ) + 4( 3 )²

= > 2( 64 ) - 4( 3 ) + 4( 9 )

= > 128 - 12 + 36

= > 116 + 36

= > 152



\:


5 0
3 years ago
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Please help I have no idea what I'm doing with any of this!!
jasenka [17]

Answer: you are doing hell jesus

Step-by-step explanation:

6 0
3 years ago
Yo! Solving linear equations with integers! These are just some practice exercises I need help with! So they should probably be
drek231 [11]

Answer:

Step-by-step explanation:

<h3>Solving linear equation with one variable:</h3>

   1) -4 + 3x = 4x - 8

        Add 4 to both sides

      -4 + 3x + 4 = 4x - 8 +  4

               3x     = 4x - 4

Subtract 4x from both sides,

        3x - 4x = -4x + 4x - 4

              -x   = -4

                \sf \boxed{\bf x = 4}

2) -5x - 8 = 2

Add 8 to both sides

 -5x - 8 + 8 = 2 + 8

            -5x  = 10

Divide both sides by (-5)

            \sf \dfrac{-5}{-5}x =\dfrac{10}{-5}

                 \sf \boxed{\bf x = -2}

3) 12r - 14 = 5(2-r)

    12r - 14 = 5*2 - 5*r

     12r - 14 = 10 - 5r

Add 14 to both sides

 12r - 14 + 14 = 10 - 5r + 14

             12r  = 24 - 5r

Add 5r to both sides

        12r + 5r = 24

               17r = 24

Divide both sides by 17

                 r = 24/17

4) 3x - 8 = -(17 + 2x)

  3x - 8 = -17 - 2x

Add 8 to both sides

3x - 8 + 8 = -17 - 2x + 8

           3x = -9 - 2x

Add 2x to both sides

      3x + 2x = -9

            5x  = -9

Divide both sides by 5

              \sf \dfrac{5}{5}x=\dfrac{-9}{5}\\\\\boxed{x = \dfrac{-9}{5}}

3 0
2 years ago
Read 2 more answers
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