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ser-zykov [4K]
3 years ago
7

I really need help with this question!

Mathematics
1 answer:
Bingel [31]3 years ago
6 0
I would convert -2pi / 3 to degrees first by multiplying by 180degrees / pi. It equals 120 degrees.

120 degrees is in quadrant II, which is 90 degrees plus 30 degrees. It is 60 degrees from the 180 degrees. 
So the reference triangle you use is 60 degrees.
Cos60 = 0.5
sin60 = sqrt(3) /2

But in quadrant II the only trig ratio that's positive is sin; all others are negative. 
So cos120 = -0.5
sin60 = sqrt(3) /2

<span>Keeping in mind that points on unit circle are (cos, sin), the point is </span>(-0.5, <span>sqrt(3) /2).
</span>
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How do I solve for Y?
Alex777 [14]

Start with the small triangle on the right:

   35 + 96 + x = 180

   x = 49

Ah, you already have that.  Nice!

Now move to the biggest triangle:

   x + 77 + (35+y) = 180

but x = 49, so

   49 + 77 + 35+y = 180

   y = 19

7 0
3 years ago
Determine the standard deviation (sigma)by filling in the table as part of your calculation. Consider the following data 6, 6, 1
12345 [234]

Answer:

A

Step-by-step explanation:

I got it right on the assignment 100%

6 0
3 years ago
Read 2 more answers
Suppose 12% of the students chose to study French their freshman year, and that meant that there were 21 such students. How many
AleksAgata [21]

Answer:

154 students

Step-by-step explanation:

First get the total number of students .

This can be gotten by

12% of A = 21

Where A represents the total number of students.

12% represents the % of A that chose to study French and 21 is the number of students that studied French .

Therefore,

12% /100% x A = 21

0.12 x A = 21

Divide both sides by 0.12

0.12/0.12 x A = 21/0.12

A = 175

The total number of students is 175.

If 21 chose to study French their freshman year ,number of students that chose not to will be total number of students minus number of those who chose to study French.

That’s

175 - 21

= 154

154 students chose not to study French their freshman year

4 0
3 years ago
The point (0, 0) is a solution to which of these inequalities? A. y – 4 &lt; 3x – 1 B. y – 1 &lt; 3x – 4 C. y + 4 &lt; 3x – 1 D.
miskamm [114]

Answer:

A

Step-by-step explanation:

Replace the point (0,0) in each inequality

A. y - 4 < 3x - 1

B. y - 1 < 3x - 4

C. y + 4 < 3x - 1

D. y + 4 < 3x + 1

A. 0 - 4 < 3(0) - 1

- 4 < - 1

True

B. 0 - 1 < 3(0) - 4

- 1 < - 4

False

C. y + 4 < 3x - 1

0 + 4 < 3(0) - 1

4 < - 1

False

D. y + 4 < 3x + 1

0 + 4 < 3(0) + 1

4 < 1

False

5 0
4 years ago
What Is 9+10? Please Tell Me. Is It 19 Or 21!?
mrs_skeptik [129]
9+10=19
proof, 9=1 plus 1 9 times (to lazy to write it out)
10=1 plus 1 10 times(to lazy)
so 1+1+1+1+1+1+1+1+1 + 1+1+1+1+1+1+1+1+1+<span>1 = 19</span>
5 0
3 years ago
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