Evaluate the expression when b=-6.

Mathematics

2 answers:

Masteriza [31]3 years ago

7 0

Hey there!

b^2 + 5b - 5

= -6^2 + 5(-6) - 5

= -36 + (-30) - 5

= -66 - 5

= -71

Therefore, your answer is: -71

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Thepotemich [5.8K]3 years ago

4 0

Answer:

$36 +( 5 \times - 6) - 5 = 36 - 30 - 5 = 1$

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2 years ago

In a triangle, two sides that measure 8 centimeters and 11 centimeters form an angle that measures 82°. to the nearest tenth of

Gwar [14]

We can use the Сosine formula to solve this problem.
<span>First we must find the third side (АС) of the triangle:
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$AC^2=AB^2+BC^2-2*AB*BC*cos82^o \\ AC^2=8^2+11^2-2*8*11*0.1392 \\ AC^2=64+121-24.4992= 160.508 \\ AC= \sqrt{160.508} \approx 12.67 \ cm$
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The smallest angle of the triangle lies opposite the smallest side, so we need to find m</span>∠C.

$cosC= \frac{AC^2+BC^2-AB^2}{2*AC*BC} \\ \\ cosC= \frac{12.67^2+11^2-8^2}{2*12.67*11}= \frac{160.53+121-64}{278.74} = \frac{217.53}{278.74} \approx 0.7804$

Now we can use Bradis's Table (I don't know the name in English, maybe Trigonometric Table?) to find m∠C:

m∠С = 38°42' = 38.7°

Answer: 38.7°

<span>I hope this helps</span>