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cricket20 [7]
3 years ago
8

Im really struggling. please help me ​

Mathematics
2 answers:
butalik [34]3 years ago
6 0

Answer:

Heya here is your answer

Step-by-step explanation:

a) 3x = 18

  x = 18/3

  x = 6

b) 2x = 9

   x = 4.5

   x  = 4 1/2 ( in Mixed fraction)

c) x/5 = 7

   x = 7 x 5

   x = 35

d) x/2 = 6.5

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

   X/2 = 6.5 // - 6.5

   X/2-6.5 = 0

    1/2 X -6.5 = 0  + 6.5

    1/2X = 6.5  : 1/2

    X = 6.5/1/2

    X = 13

Hope this answer satisfies you

     

Wittaler [7]3 years ago
5 0

Answer:

A. x=6   B. x=4.5   C. x-35   D. x=13

Step-by-step explanation:

For A and B, divide the numbers you have. For C and D, multiply the numbers you have.

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The top of the Boulder Dam has an angle of elevation of 1.2 radians from a point on the Colorado River. Measuring the angle of e
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Answer:

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Step-by-step explanation:

The solution diagram is attached below :

Converting radian measurement to degree :

radian angle * 180/π = degree angle

1.2 * 180/π = 68.755°

0.9 * 180/π = 51.566°

Height of dam is h:

Using trigonometry :

Tan θ = opposite / Adjacent

Tan 68.755° = h / x

h = x Tan 68.755° - - - (1)

Tan 51.566° = h / (155+x)

h = (155+x) tan 51.566° - - - (2)

Equate (1) and (2)

x Tan 68.755 = (155+x) Tan 51.566

x Tan 68.755 = 155tan 51.566 + x tan 51.566

x Tan 68.755 = 195.32311 + x Tan 51.566

x Tan 68.755 - x Tan 51.566 = 195.32311

x(tan 68.755 - tan 51.566) = 195.32311

x * 1.3120110 = 195.32311

1.3120110x = 195.32311

x = 195.32311 / 1.3120110

x = 148.87307

Using :

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h = 148.87307 * tan(68.755)

h = 382.92539

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