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Lady_Fox [76]
3 years ago
10

Evaluate the following expression. cos870° - sin780º =

Mathematics
1 answer:
Yuri [45]3 years ago
8 0

Answer:

-sqrt(3)

Step-by-step explanation:

Solve each individually

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What is equivalent to 9 3/4?
Nata [24]

Step-by-step explanation:

We need to say that 9^{3/4} is equivalent to what.

We know that, (3)² = 9

So,

9^{3/4}=((3)^2)^{3/4}\\\\=3^{3/2}

We can write 3^{3/2} =3\times 3^{1/2}

And 3^{1/2}=\sqrt{3}

So,

3\times 3^{1/2}=3\sqrt{3}

So, 9^{3/4} is equivalent to 3\sqrt{3}.

Hence, this is the required solution.

6 0
3 years ago
A flower pot, in the shape of a cylinder,l has a circumference of 66 in. and a height of 30 in.
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The amount of soil that the pot can hold is best approximated by calculating for the volume of the cylinder through the equation,
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                      C = 2πr;    r = C/2π = 66 in/2(π) = 10.5 in
Then, substituting the known values. 
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                                 V = 10,390.81 in³
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3 years ago
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Answer:

a. the number of people at Friday's, Saturday's, and Sunday's performances combined.

Step-by-step explanation:

The reason this information is needed to solve this problem is because we are looking to find the number of people who attended Saturday's performance. Without any information on Saturday's performance, there is no way to solve the problem. We are given the number of people on Friday and Sunday's performance, but are not given a total amount of people on all performances.

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3 years ago
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If we use the surface of the water as our frame of reference, then Christy's vertical position could be represented by -12 ft.

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3 years ago
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