is it a,b,c or d I have 5 minutes please hurry

Answer:

can you post the picture again in my screen it's black

Hi there! Before we start with your problem. Recall the Trigonometric Function of (-x) first.

Now what we need to do is to imagine a unit circle. We know that angle (-x) rotate clockwise while (x) rotates counterclockwise.

Now imagine if it rotates clockwise, it:d start at the fourth quadrant first. That means the y-value is negative while x-value is positive.

We also know that (x, y) = (cos, sin)

Now move to the 2(pi)/3.

[tex] \large{ \frac{2 \pi}{ 3} = \frac{2(180)}{3} \longrightarrow 2(60)= \boxed{120 \degree}}[/tex]

Thus, the value of 2pi/3 is 120°

Now imagine again. In a unit circle, 120° is in second quadrant if we rotate counterclockwise. But if we rotate clockwise, where would the 120° be? Remember that (-x) rotates clockwise. That's right! (-120°) is in the third quadrant. In the third quadrant, cos is negative there along with sin.

So we can conclude that:

120° is also a reference angle of 60° because of 180°-60° = 120°

Thus,

[tex] \large{cos( - \frac{2 \pi}{3} )= cos( - 120 \degree) = cos(120 \degree) \longrightarrow - \frac{1}{2} }[/tex]

Answer/Conclusions

Answer: 399=300+90+9

-45=0+40+5

300+130+14=414

Step-by-step explanation:

Expanded form is a way to write numbers by showing the value of each digit.

Answer:

300 + 90 + 9

-45= 0 + 40 + 5

399-45=354

Step-by-step explanation:

Answer:

Step-by-step explanation:

2.fraction

3.ratio

5.solve

6.multiply

7.quantities

8.terms

9.table

10.extend

11.whole

Answer:

it should be 0.23 cm when rounded to the nearest hundredth

Answer:

0.8 percent

Step-by-step explanation:

divide 228 by 285

Answer:(-5,-1)

Step-by-step explanation: 4+(-9)=-5      11-10=-1       Answer would be (-5,-1)

Answer:

N = -12

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

Every group of candies eaten is 4 candies because Valerie eats 3 and her friend eats 1. 1+3 = 4 . 12/4 = 3

Step-by-step explanation:

1 : 3 = 4 <-- simplified ratio

x : y = 12 <-- trying to find the real ratio

12 ÷ 4 = 3 <-- find the unit rate

1 × 3 = 3 <-- find how much the friend has

So, her friend got 3 candies

Answer:

4 4/5 in or 4.8 in

Step-by-step explanation:

multiply 1 1/5 by 4

Answer:

Maia has grown 4.8 inches in the past 4 years.

Step-by-step explanation:

1 1/5 * 4 = 4.8

Answer:

Jeon Jungkook from bts

Step-by-step explanation:

I love bts.

Answer:

What u said dosent make sense lol

Answer:

N = 30

Step-by-step explanation:

3: 10 = 3/10 = 0.3

0.3 * 100 = 30 = N

Answer: 30/100

Step-by-step explanation: 3:10=3/10. N/100 Divided by 10 is N/10; multiply 3/10 by 10.

Answer:

8.

60 * 2 + 30 = 150km

225 - 150 = 75km

50km/h  and  75km, so 1.30h

1.30 + 2.30 + 0.10 = 4.10h

Im not very good at english so I dont know how to explain...

9.

1.30 - 47 = At 12.43

Answer:

1. The result can be shown in multiple forms.

Exact Form:

73/14

Decimal Form:

5.21428571…

Mixed Number Form:

5(3/14)

2. The result can be shown in multiple forms.

Exact Form: 15/72

Decimal Form: 78.5

Mixed Number Form: 7(8/12)

3. The result can be shown in multiple forms.

Exact Form: 1373/12

Decimal Form: 114.416

Mixed Number Form: 114(5/12)

4. The result can be shown in multiple forms.

Exact Form: 3079/744

Decimal Form: 4.13844086…

Mixed Number Form: 4(103/744)

Step-by-step explanation:

Answer:

220

This should be correct since you are multiplying by 2

Answer: 220 just multiply by 2

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

since a triangle have 3 sides and 6x-6.3 is the formula u divide it by 3 and u get 2x-2.1 also = to c

Answer:

explanation was in pic

the answer is "42"

Answer:

A- 42 pots

Step-by-step explanation:

256/6=42.67

the .67 is only 2/3 a filled pot so it does not count as a whole filled pot... the answer is just the completely filled pots so it is 42

Firstly, divide 30 by 1425

Then, 1425/30 = 47.5

A Mixed number = A whole number + fraction

Your final answer = 47 1/2 trains

Hope this helps <3 Good luck with future exams!

P.S Fun Fact~~ The Mona Lisa has no eyebrows!

Answer:

c

Step-by-step explanation:

Andy ran LESS then 60 miles and it does not say equal to so we can assume it's C.

Answer:

x=12

Step-by-step explanation:

Answer:

x=12

Step-by-step explanation:

multiply both sides by 4 to cancel the fraction 1/4x so you can add them together

so once you multiply both sides by 4 the equation is

2x+20=x+32 so then combine like terms but subtracting x so that's

x+20=32 then minus 20 to solve

x=12

Hope this helps! :)

Answer:

f = 33°

Step-by-step explanation:

58+89 = 147

180-147 = 33

cause these 3 angles should add up to 180°

Answer:

1. Daniel has 24 local stamps.

2. Mr. Kim cut the shorter piece of wire to 30 cm.

3. The volume of the green paint is 1050 milliliters.

5. The ratio of the tv price to the table price is 24:11

6. The ratio of the cards Chris gave away to the ones he has left is 3:8

7. There are 704 passengers in total.

Step-by-step explanation:

1. The total number of stamps is 96 and the ratio is 1:3. If you add the 1+3 to get a total, you get 4. For every 4 stamps, 1 is local and 3 are foreign. If you divide 96 by 4, you get 24. Since the ratio is only 1:3, the ratio is 24:72. (to get the 72, just divide 24*3[the other ratio number]) To check it, you can divide each side by 24 and you'll end up with the original ratio.

2. If the wire in total is 180 cm, you can do the same you did with number 1. Add the ratio to make it a total, 1:5 - 1+5 =6 then divide 180 by 6. 180/6 is 30. Multiply your quotient with the ratios and you'll get the full ratio. The ratio ends up being 30: 150 and if you add them, you do get 180 which is the length of the wire :)

3: The ratio of this is 3:4 of blue paint to yellow paint. You get the information that 600 milliliters of yellow paint is used. With that, you can create the equation 3/4 = x/600. You get x/600 because the amount of blue paint is unknown therefore you use an x for that ratio. To solve that, you multiply diagonally and get 1800/4x. If you divide it you get 450x. Basically, 450 is the amount of blue paint and if you add it with the yellow paint, you get 1050 milliliters of the green paint that had been created.

5. The table costs $275 and the TV is $325 more than the table. If you add them, you get the cost of the TV, which is $600. The ratio of the price of the TV to the table is 600:275. Once you simplify it, it's 24:11. To simplify it, divide it by the GCF and in this case, the GCF is 25.

6. Chris starts with 198 cards but gives 54 away. He ends up with 144. The ratio is 54:144 because it is a ratio of how many he gave away to how many he has left. Once you simplify the ratio, it's 3:8.

7. There are 288 seated passengers and the ratio of seated passengers to standing passengers is 9:13. In this problem, you make an equation, 288/x = 9/13. You multiply diagonally, 288*13 = 3744 and 9x. you end up with 3744/9x and when you divide it, you get 416. 416 represents the number of standing passengers. If you add 416 and 288, you get the number of total passengers which is 704.

I HOPE YOU GET THIS IN ON TIME!! GOOD LUCKK

The range is the difference between the least and greatest data value

range= 65 - 37 ⇦ subtract the least value from the greatest value,

28 ⇦ will be the range of the data.

Answer:

The mode of the data set is 8

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

The mode is the number that repeats the most, 5 and 6 don't repeat, 10 repeats once, 7 repeats twice, and 8 repeats four times.