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Tcecarenko [31]
3 years ago
14

Find the measure of angle B​

Mathematics
1 answer:
Irina18 [472]3 years ago
8 0

Answer:

Step-by-step explanation:

Use the Law of Cosines for this. If we want the measure of angle B, then the equation is set up like this:

b^2=a^2+c^2-2accosB

Filling in:

9^2=14^2+6^2-2(14)(6)cosB and simplifying a bit:

81 = 196 + 36 - 168cosB and a bit more:

81 = 232 - 168cosB and even more:

-151 = -168cosB and divide both sides by -168 to get

.9378881988 = cosB

Now use the 2nd button on your calculator along with the cos button to find the missing angle. Make sure your calculator is in degree mode first. Your angle should be 20.30012152

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tresset_1 [31]
I got d!
  But i may be wrong.. I'm not the BEST at math. Let me know if i was right!!

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A researcher wants to compare student loan debt for students who attend four-year public universities with those who attend four
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Answer:

A simple random sample.

Step-by-step explanation:

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3 0
3 years ago
How to make average ?
Viktor [21]

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6 0
3 years ago
12. Simplify:<br> 5x + 3y - 2y + 3xy + 5xy - 10x
Serggg [28]

Hey there!

\textsf{5x + 3y - 2y + 3xy + 5xy - 10x}

\textsf{Combine like terms}

\textsf{(5x - 10x) + (3y - 2y) + (3xy + 5xy)}\\\mathsf{5x - 10x = -5x}\\\mathsf{3y - 2y = 1y}\\\mathsf{3xy + 5xy= 8xy}\\\boxed{\boxed{\mathsf{Answer: \bf{8xy-5x+y}}}}\huge\checkmark

\textsf{Good luck on your assignment and enjoy your day!}

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5 0
3 years ago
URGENT!! Need help can someone explain please!!!
forsale [732]

Answer:

The answer to your question is 1 = 69°

Step-by-step explanation:

To solve this problem remember that the sum of the internal angles in a triangle equals 180°.

Let the third angle of the triangle be x.

             39° + 30° + x = 180

Solve for x

             x = 180 - 39 - 30

             x = 111°

Angle x and angle 1 are supplementary so their sum equals 180°.

            111° + 1 = 180

                      1 = 180 - 111

                       1 = 69°      

5 0
3 years ago
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