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ahrayia [7]
4 years ago
11

 Precal on plato help please

Mathematics
1 answer:
RoseWind [281]4 years ago
8 0
We can use the Cosine Law:
c² = a² + b² - 2 ac cos C
180² = 50² + x² - 2 · 50 · x · cos 150°
32,400 = 2,500 + x ² - 100 x · ( - √3/2 )
32,400 - 2.500 - x² = 100 x · 0.866
29,900 - x² = 86.6 x
- x² - 86.6 x + 29,900 = 0  / · ( - 1 )
x² + 86.6 x - 29,900 = 0
x 1/2 = ( - 86.6 +/- √(86.6² + 4 · 1 · (-29,900) )) / 2
x = ( - 86.6 + 356.6 )/ 2  ( other solution is negative )
x = 135
Answer: C ) 135 miles/hour
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sveticcg [70]

Answer:

D. C+9

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4 years ago
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kenny6666 [7]

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8 0
2 years ago
How do i find the sin 11pi/2 without using a calculator?
Basile [38]
The values of sin cycle on the domain 0 to 2π
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7 0
3 years ago
Tommy multiplied 0.24 by 100 to change it to what type of number?
wlad13 [49]
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3 years ago
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