SOLUTION: 1. Identify the indicated sum. Image: http://my.thinkwell.com/questionbank/94001-95000/94420/img/245513.gif Options: −660 −330 330 660 2. Identif

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Question 984965: 1. Identify the indicated sum.
Image:
http://my.thinkwell.com/questionbank/94001-95000/94420/img/245513.gif
Options:
−660
−330
330
660
2. Identify the graph that represents an angle in standard position with the measure -140.
Options:
http://my.thinkwell.com/questionbank/94001-95000/94450/img/236989.jpg
http://my.thinkwell.com/questionbank/94001-95000/94450/img/236990.jpg

http://my.thinkwell.com/questionbank/94001-95000/94450/img/236991.jpg
http://my.thinkwell.com/questionbank/94001-95000/94450/img/236992.jpg
3. Use the given measurements to solve ΔABC. Round to the nearest tenth.
a = 15, b = 11, c = 7
Options:
m∠A ≈ 25.8°; m∠B ≈ 43.2°; m∠C ≈ 110.9°
m∠A ≈ 43.2°; m∠B ≈ 110.9°; m∠C ≈ 25.8°
m∠A ≈ 110.9°; m∠B ≈ 25.8°; m∠C ≈ 43.2°
m∠A ≈ 110.9°; m∠B ≈ 43.2°; m∠C ≈ 25.8°








Answer by macston(5194)   (Show Source): You can put this solution on YOUR website!
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1.Indicated sum:
c=-3 (coefficient of k), n=15, x=constant=2
(1/2)cn(n+1)+2(x)
(1/2)(-3)(15)(16)+2(15)
-360+30=-330 ANSWER: -330
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2. Standard position starts on x-axis pointing positive from origin turning counterclockwise.
The negative angle would turn clockwise so the answer is the third, 236991.jpg
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3. Law of Cosines:
.

.

.

.

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A+B+C=180 degrees
C=180-A-B
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Just fill in values: a=15; b=11; c=7
.




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Try the rest on your own. Equations given above.
.
NOTE: Please limit questions to one per post in the future.

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