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Lostsunrise [7]
3 years ago
8

Find X. Round to the nearest tenth. Law of Cosines : c2 = 22 + b2 - 2ab cos C

Mathematics
1 answer:
fiasKO [112]3 years ago
7 0

Answer:

70.5°

Step-by-step explanation:

22² = (20)²+(18)² - 2(20)(18) cos X

484 = 400 + 324 - 720 cos X

-240 = -720 cosx

1/3 = cos X

cos^{-1}(\frac{1}{3}) = X

X = 70.52877937

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I really suck at math plz help me
inysia [295]
You would have to have common demoniators to add.
8/10 can be turn into 80/100 by multiplying the denominator and nominator by ten
75/100+80/100, you add the nominators ONLY, dont change the denominator.
75+80=155

so your answer would be 155/100
4 0
3 years ago
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1. The speed of a motorcycle increases from 10 km/hr to 50 km/hr in 9
liraira [26]

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The acceleration is 4.4 km/sec/sec

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What number is between 1/6 and 1/4?
stepladder [879]

Answer:

5/24

Step-by-step explanation:

First, we want to get a common denominator, so we multiply them together.

The 2 new fractions are. . .

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Now, if you are looking for the number between 4/24 and 6/24, the answer is 5/24.

5 0
3 years ago
Please help me with this question
dmitriy555 [2]

if any doubt leave a comment

3 0
2 years ago
Fill in the question mark ?5
timurjin [86]
I don't really understand your question , can you rephrase it ?

Do you mean ?5x7 = 455 ?
because then it would be :
455 divided by 7 which equals 65  :) 
7 0
3 years ago
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