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SpyIntel [72]
3 years ago
14

4/5,3/10 =. Please help

Mathematics
1 answer:
KengaRu [80]3 years ago
5 0

Answer:

The answer would be 0,0754716981

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Abigail has decided to examine her checking account statements. Last month's account balance was $74. This month, ot is $37. Wha
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A hot air balloon rose from ground level to 1000 feet in order to pass over a mountain. The balloon then descended 800 feet to a
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What are the measures of angles 1 and 2?
Scilla [17]

Answer:

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4 years ago
Question 72 true or false
nalin [4]

Answer:

True

m∠T = 40.4°

Step-by-step explanation:

We know all the sides of the triangle but we do not know any of its angles.

To find out if the angle T = 40.4 ° we use the cosine theorem.

According to the cosine theorem:

c^2=a^2 +b^2-2abcos(\alpha)

Where \alpha is the angle between a and b.

In this case:

\alpha = T\\\\a= 11\\\\b=13\\\\c= 8.5

Then we clear α from the formula and verify that it is equal to 40.4 °

8.5^2 =11^2 + 13^2 -2(11)(13)cos(\alpha)\\\\8.5^2 -11^2 - 13^2= -2(11)(13)cos(\alpha)\\\\-8.5^2 +11^2 + 13^2= 2(11)(13)cos(\alpha)\\\\\frac{-8.5^2 +11^2 + 13^2}{2(11)(13)}=cos(\alpha)\\\\\alpha=arcos(\frac{-8.5^2 +11^2 + 13^2}{2(11)(13)})\\\\\alpha = 40.4\° =T

6 0
3 years ago
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