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Lynna [10]
3 years ago
13

Please help me I’m just learning this

Mathematics
1 answer:
rosijanka [135]3 years ago
6 0

Answer:

64 cm^2

Step-by-step explanation:

Area of Shaded Region = Area of Parallelogram - Area of Rectangle

Area of Parallelogram = 10 * 7 = 70

Area of Rectangle = 2 * 3 = 6

70 - 6 = 64 cm^2

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PLEASE EXPLAIN BECAUSE A GIRL IS COMPLETELY LOST HERE
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Hello!


To find the value of b, we need to use the Law of Sines. The law states,

sin A / a = sin B / b = sin C / c.


We are given these values: sin A = 55 degrees, side a = 8 cm, sin C = 82 degrees.


Since angle B is not given, we have to find it ourselves. We can find the measure of angle B by subtracting both the given angle values from 180 degrees because every triangle is equal to 180 degrees.


180 - 55 - 82 = 43 | The measure of sin B = 43 degrees.


sin (55) / 8 = sin (43) / b (multiply both sides by b)

0.10239... · b = 0.68199... (divide both sides by 0.10239...)

c = 6.6607...


The measure of side b is equal to about 6.7 centimeters.

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alexgriva [62]

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Step-by-step explanation:

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Given vectors a=(-1,-2), b=(-2,3), c=(3,-1), d=(-3,2) find the dot product of b and d.
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hope it helps u.........

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