1 year ago

Please help me im stuck on this

Mathematics

1 answer:

Strike441 [17]1 year ago

7 0

Answer:

Step-by-step explanation:

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In △ABC, a=31, b=22, and c=18. Identify m∠A rounded to the nearest degree. HELP ME PLEASE!!

4vir4ik [10]

Answer:

The measure of angle A is $101\°$

Step-by-step explanation:

we know that

Applying the law of cosines

$a^{2} =b^{2}+c^{2}-2(b)(c)cos(A)$

substitute the values and solve for cos(A)

$31^{2} =22^{2}+18^{2}-2(22)(18)cos(A)$

$cos(A)=[22^{2}+18^{2}-31^{2}]/(2(22)(18))\\ \\cos(A)=-0.193182\\ \\A=arccos(-0.193182)=101\°$

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3 years ago

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weqwewe [10]

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2 years ago

Write the exponent for the expression. <br> 1/8 x 1/8

kompoz [17]

Answer:

$8^{-2}$

Step-by-step explanation:

$2^{-2} = 1/4$

So:

$8^{-2} = 1/8*1/8$

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2 years ago

Please help me.. I do not know this. I will give 100 points if you answer.

babunello [35]

Answer:

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Step-by-step explanation:

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2 years ago

3 1/4 - 1 3/8 (please help)

viva [34]

In fix fraction it will be, 1 7/8

and the exact answer is 15/8

and in decimal from it will be, 1.875

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2 years ago

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