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2 years ago

Find the length of side BC. Give your answer to 3 significant figures. C A 71° B

Mathematics

2 answers:

lana66690 [7]2 years ago

5 0

Answer:

19.4°

Step-by-step explanation:

I put the image of how I did it if you don't understand let me know

Vikki [24]2 years ago

4 0

Answer:

BC ≈ 19.4 cm

Step-by-step explanation:

using the cosine ratio in the right triangle

cos71° = $\frac{adjacent}{hypotenuse}$ = $\frac{AB}{BC}$ = $\frac{6.3}{BC}$ ( multiply both sides by BC )

BC × cos71° = 6.3 ( divide both sides by cos71° )

BC = $\frac{6.3}{cos71}$ ≈ 19.4 cm ( to 3 sig. figs )

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Ksenya-84 [330]

Answer:

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Step-by-step explanation:

The length is 2 feet less then twice the width

Let the width be x.

Then the length is 2x -2 based on the given information. Use this to make an equation since it is known that the area is 180feet squared.

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2x^2 - 2x - 180 = 0

2( x^2 - x - 90) = 0

We now have a factorable quadratic.

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So by zero product property, x=-9, x=10 Since a measure cannot be negative, -9 is an extraneous solution.

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-Dominant- [34]

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

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Answer:

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Answer:

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