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Illusion [34]
3 years ago
12

What is the length of side c, given a = 10, b = 8, and c = 105°?

Mathematics
1 answer:
posledela3 years ago
5 0
We can calculate using cosinus method in triangle
c² = a² + b² - 2ab cos c

Plug in the number to the formula
c² = a² + b² - 2ab cos c
c² = 10² + 8² - 2(10)(8) cos 105°
c² = 100 + 64 - 160 cos 105°
c² = 164 - 160 (-0.26)
c² = 164 + 41.6
c² = 205.6
c = √205.6
c =14.34

C is 14.34 unit length
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ANTONII [103]
Andy's age            = x
Jeff's age              = x-2
Andy's age in five years            = x+5
Jeff's age in five years              = x-2+5
The sum of their ages in five years        = x+5 + x-2+5

                                       x + 5 + x - 2 + 5 = 40
                                         2x + 8 = 40
                                         <u>    -8        -8</u>
                                              2x = 32
                                             <u> :2      :2</u>
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<u>Andy is 16 years old and Jeff is 14 years old</u>
8 0
3 years ago
Identify the values of a, b, and c in this quadratic equation:
riadik2000 [5.3K]

Answer:

C

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Step-by-step explanation:

I think you did not include the sign between the x^2 and the 8x...my guess is that it is a minus.

By process of elimination the answer is not B or D bc the a-value is 1 not 0.

Then the +12 you did include in the original question indicates that the c-value is 12 not -12 eliminating answer A.

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loris [4]

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Step-by-step explanation:

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3 0
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