If sinA=1/7, sinB=1/3.
Prove: cos2A=sin4A​

Answers

Answer 1

Answer:

Question!! What is the relationship between A and B?

Step-by-step explanation:


Related Questions

The population of Fantasy City doubles each month. When will the city be half populated if it will be fully populated in 10 months.

Answers

Using an exponential function, it is found that the city will be half populated in 9 months.

The population of Fantasy City doubles each month, hence, after t months, the population is given by:

[tex]P(t) = P(0)2^{t}[/tex]

In which P(0) is the initial population.

Fully populated in 10 months, hence, the full population is:

[tex]P(10) = P(0)2^{10} = 1024P(0)[/tex]

Hence, half populated is [tex]P(t) = \frac{1024P(0)}{2} = 512P(0)[/tex], hence:

[tex]P(t) = P(0)2^{t}[/tex]

[tex]512P(0) = P(0)2^{t}[/tex]

[tex]2^t = 512[/tex]

[tex]2^t = 2^9[/tex]

[tex]t = 9[/tex]

The city will be half populated in 9 months.

To learn more about exponential functions, you can take a look at https://brainly.com/question/25537936

Ratio. Proportion and many method d) 15 workers were employed to complete a piece of work in 36 days. How many more workers should be added to complete the work in 30 days?​

Answers

Answer:

Step-by-step explanation:

total of 15(36) = 540 person•hours was used

540 / 30 = 18 people

18 - 15 = 3 people need to be added

How does the number 7 in 777.77 in the tenths place compare to 7 in the hundredths place

Answers

Answer:

0.7 is 7/10 Example out of ten cookies 7 are chocolate chip

0.07 is 7/100 Example out of 100 cookies 7 are chocolate chip

Hope This Helps!!!

The game starts as follows. You pick one medal without unwrapping it, and then the game host unwraps one of the remaining medals and reveals that it is a silver medal. (Assume here that the host unwraps a medal with equal probability, but knowing where the gold medal was and avoiding unwrapping the gold medal if still on the table, to keep the game interesting to watch until the end.) You have now three medals left to unwrap (one in your hand, two on the table). At this point, the host gives you the option to change your mind and swap your medal for one of the two left on the table. What would you do at this point? Would you keep your medal, or swap it with one of the two medals left on the table? If so, which one?

Answers

Answer:

I'd swap with one on the table (the left one) but with my luck it would be a sword made of rubber

Need help pls answer asap. Sorry the photo quality is bad.

Answers

Answer:

Step-by-step explanation:

1 + 3 = 4

so find the point 1/4 of the way from (-1, 2) to (7, 8)

x coordinate

Δx = ¼(7 - (-1)) = 2

x = x₀ + Δx

x = -1 + 2 = 1

y coordinate

Δy =  ¼(8 - 2) = 1½

y = y₀ + Δy

y = 2 + 1½ = 3½

(1, 3½)

When dealing with business analysis, when there is a graph of two linear equations, what is the point of intersection
called?
a break-even point
c. profit point
b. loss point
d. output

Answers

Answer:

1. a break-even point

Step-by-step explanation:

This is when the two profits are the same between 2 companies / businesses, thus it is when they break even, or have the same amount of money

1 decigram (dg) = ______ grams (g)?

A. 0.01


B. 0.1


C. 0.001


D. 10

Answers

Answer:

B) 0.1

Step-by-step explanation:

The prefix "deci-" means "tenth", so a decigram would be one-tenth of a gram (or 0.1 grams). Therefore, option B is correct.

If a cylinder has a volume of 648pi cm3( 3rd power) and a height of 8 cm, what is the radius?

Answers

[tex]\textit{volume of a cylinder}\\\\ V=\pi r^2 h~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ V=\stackrel{cm^3}{648\pi }\\ h=8 \end{cases}\implies 648\pi =\pi r^2(8) \\\\\\ \cfrac{648\pi }{8\pi }=r^2\implies 81=r^2\implies \sqrt{81}=r\implies \boxed{9=r}[/tex]

2 3/7 + (-1 3/4) i need help please

Answers

Answer:

1/28

Step-by-step explanation:

help me please!! <33​

Answers

Answer: Choice J

13/20 - 1/2

===================================================

Explanation:

Ignore the big X and the shading for now. This figure has 4 rows by 5 columns of rectangles. So there are 4*5 = 20 little rectangles total. Each little rectangle represents 1 brownie.

Then let's say the shaded region represents the amount of brownies Mary receives. We have 13 rectangles shaded in out of the 20 total. This means 13/20 is the fractional amount Mary gets.

She then eats 10 of the 20 total, so she eats 10/20 = 1/2 of the brownies.

Therefore, we end up with the expression 13/20 - 1/2 to represent the fractional amount that Mary still has that she hasn't eaten yet (which is 3/20).

We can say: 13/20 - 1/2 = 13/20 - 10/20 = 3/20

What is an equation of the line that passes through the point (6,-4) and isperpendicular to the line 22 - y = 5?

Answers

y=1/17 maybe cuz perpendicular you change the negative and positive signs and flip the variable and the equation is 22-y=5 which is y=-17 so if you flip it it’s y=1/17

Veronica made 960 cookies to sell. She wants to package the cookies in boxes of 16. Her goal is to make $630 from selling her cookies.

Answers

Answer: She should charge $10.50 for each box

Step-by-step explanation:

Total cookies = 960

Each box has 16 cookies

Her goal is $630

First, you want to find out how many boxes she made

960÷ 16 = 60

She made 60 boxes

Now you want to find the price for each box

630 ÷ 60 = 10.5

She should charge $10.50 for each box

I hope this helps!!!

Katie has $150 in her savings account.
She wants to buy a new iPad that
costs $375. How many weeks will it
take her to have enough to buy the
iPad if she saves $25 each week?

Answers

Answer:

9

Step-by-step explanation:

375 - 150 = 225

225 / 25 = 9

Answer:

I believe the answer would be 9 weeks

The time it takes to transport goods has __________ over time, causing trade to __________. A. increased . . . decrease B. decreased . . . decrease C. decreased . . . increase D. increased . . . increase Please select the best answer from the choices provided A B C D

Answers

Answer: C. decreased . . . increase.

As technology is advancing it requires less time and effort to do almost anything. So for tranportation as well i think it will take less time to do it. Thus logically people would want to trade more because the transport goods take less time. I guess?

Answer:

C

Step-by-step explanation:

Cumulative Exam 2021

Merry Christmas <3

P.S. Have a good winter break :)

Please help with this question !!

Answers

Answer:

c) i^337 is equivalent to the expression i^137

Please help me solve this math problem

Answers

Answer:

I think it is undefined.

URGENT simplify (5^3 x 5^5)^5

Answers

Answer:

5^40

Step-by-step explanation:

Step 1: Multiply the exponents within the parentheses with the exponent outside of the parentheses.

[tex](5^3^*^5)(5^5^*^5)[/tex] [tex](5^1^5)(5^2^5)[/tex]

Step 2: Based on the laws of exponents, add the exponents together.

[tex]5^(^1^5^+^2^5^)[/tex] [tex]5^4^0[/tex]

Therefore, the answer is 5^40.

Cynthia gave 15 of her toys to her little sister. If she had 25 toys, how many did she give away?

Answers

5

she gave her sister 5 toys.

Correction to the question - It is not 15 it 1/5th.

According to the given question Cynthia had 25 toys and she gave 1/5th of her toys to her little sister.

So, The total number of toys is 25 to find 1/5th of it we need to multiply the total number of toys she had and the fraction she gave.

(25 x 1/5) = 5. so the number of toys she gave away to her little sister is 5.

To solve more of these kind of arithmatic and alzebraic word problems just search on web for word problems on arithmatic and  alzebra.

Learn more about word problems here :

https://brainly.com/question/2610134

#SPJ2

A soccer ball has an interior diameter of 22 cm. How many cubic centimeters of air does a soccer ball contain, rounded to the nearest tenth of a centimeter?​

Answers

Answer:

20m

Step-by-step explanation:

bc 22m rounded to the closest tenth is 20m.

Hopes This Helps :)

Answer:

about 180 cm

Step-by-step explanation:

Write the equation of the parabola that has the vertex at point
(−2, 5.5) and passes through the point (−2.5, 2.5).

Answers

Answer:

-12x²-48x-42.5

Step-by-step explanation:

i need help fast plz

Answers

Answer:

27/16

Step-by-step explanation:

[tex]12 \div \left(2 + \dfrac 23 \right)^2\\\\\\=12 \div \left(\dfrac 83 \right)^2\\\\\\=12 \div \dfrac{64}9\\\\\\=12 \times \dfrac{9}{64}\\\\\\= \dfrac{3 \times 9}{16}\\\\\\=\dfrac{27}{16}\\\\\\=1\dfrac{11}{16}[/tex]

Marsha is driving 630 otal miles on a trip. She has already driven 2/5 of the distance. How far has Marsha driven?

Answers

Answer:

Marsha has driven 252 miles

Step-by-step explanation:

In order to figure out the problem, you take the total distance and multiply it by the fraction she has gone. This would be 630*(2/5) which would equal 252. Thus, Masha has driven 252 total miles.

Hope this helps!     :)

Which product is negative?

Answers

Answer:

it is (3/8)( -5/7)(-1/4)

if ot it should be the one that is all postitive

Please solve the question on the file.

Answers

Answer:

Step-by-step explanation:

they arent similar because the ratio of 8 to 14 and 10 to 18 arent the same.

Keith bought 4 new baseball trading cards to add to his collection. The next day his dog at half of his collection. There is now 25 cards left. How many cards did Keith start with?

Answers

Keith started with 42 cards.

Answer:

46 cards

Step-by-step explanation:

We can use a variable to represent the starting amount of cards: (x)

Keith bought 4 new cards: (+4)

His dog ate half of the collection: (x/2)

There are now 25 cards: (=25)

So we can use this expression to find the starting amount: (x+4)/2=25

Start by multiplying both sides by 2 to get rid of the (x/2).

Now subtract 4 from both sides to get rid of the (+4).

Finally, we know x= 46

Thus, Keith started with 46 cards.

If [tex]f(x) = x[/tex]² [tex]-x+3[/tex], then what is the reaminder when [tex]f(x)[/tex] is divided by [tex]x+9[/tex]?

Answers

Answer:

Remainder is 93

Step-by-step explanation:

Use synthetic division:

-9 | 1   -1    3

____ -9   90

     1 -10 | 93

Therefore, the remainder is 93

What are the steps in multiplying decimals?​

Answers

Answer:

Ignore the decimal points then multiply the numbers that remain. Count the number of decimal places in all of the numbers of the question combined. Place the decimal point so that there are the same number of decimal places in the answer and the question.

Step-by-step explanation:

If PQ =13 and PR = 18, what is QR?

Answers

Answer:

QR is equal to 5 since 13 is 5 less that 18. So since 13 was already taken, that leaves 5

Evaluate. Express your answer in scientific notation.
4.36 x 104 – 41, 600

Answers

Answer: 3.456 × 1011

Step-by-step explanation:

If you connect the points where Muntinlupa City and Teresa, Rizal are located, what is the slope of the line formed from the two given places?

Answers

Using it's formula, it is found that the slope of the line formed from the two given places is of [tex]\mathbf{\frac{6}{7}}[/tex]

Given two points [tex](x_1, y_1)[/tex] and [tex](x_2,y_2)[/tex], the slope is given by change in y divided by change in x, that is:

[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

In this problem:

Muntinlupa is at (-1,-4);Teresa, Rizal is at (6,2).

Hence, applying the formula for the slope, considering [tex](x_1, y_1) = (-1, -4)[/tex] and [tex](x_2,y_2) = (6,2)[/tex]:

[tex]m = \frac{2 - (-4)}{6 - (-1)} = \frac{6}{7}[/tex]

The slope is of [tex]\mathbf{\frac{6}{7}}[/tex]

A similar problem is given at https://brainly.com/question/5427529

Other Questions
Select the correct answer. which process involves creating a product by heating metals and changing their shape through the application of mechanical force? A. finishing B. forming C. assembling D. castingwould it be forming? or casting? I'm so lost aA person throws a ball up into the air, and the ball falls back towarwould the kinetic energy be the lowest? (1 point)at a point before the ball hits the groundwhen the ball leaves the person's hando when the ball is at its highest pointat a point when the ball is still rising Exercise: Write the phrases to the imperative conjugated to the person indicated among parentest 1. das T-Shirt kaufen (du) 2. einkaufen gehen (wir) 3. die Hose anprobieren (Sie) 4. das Deutschheft 5. ins Zentrum fahren (wir) 6. zur Schule gehen (ihr) 7. kein Geld ausgeben (Sie) 8. den Text lesen (ihr) Find the intersection point for the following linear functions.Rx) = 2x + 38(x) = -4x - 27 Which strike hurt the labor movement the most? Was it the fault of the workers, if notthen who? Solve 3-x/2-42 B. x > -30 C. X< -30 D. X Can someone help me make up a thesis statement? Night by Elie Wiesel and the literary theme I chose was Good vs Evil Expand the following expressions and write in standard form. Show your work.a) (3x + 2)(1 - 4x)b) (x - 5)^2(2x + 7)Please help!!!! I WILL GIVE BRAINLIEST TO WHOEVER HELPS MEI keep pressing the "fn" key or "function" key and the disable / enable touchpad buttonfn + f9 = enable/disable touchpadbut all it's doing is disabling it, everytime I press to enable it just keeps saying "touchpad has been disabled" Dear Editor, Yesterday, the local Toll Road Committee decided to raise the cost of the toll roads by 35 percent. A toll that used to cost $1.50 will now cost $2.03. The Committee claims to need the money because of budget troubles. I just want to be clear that I don't believe them for a minute. This is nothing but a greedy move by the Committee. Their budget problems are their own fault. If they eliminated wasteful spending, then they wouldn't need to raise the tolls.The tone of this passage can be best described as A. sentimental. B. apologetic. C. affectionate. D. disdainful. can anyone just give me an argumentative essay prompt? thank you if you do PLZ HELP AS SOON AS POSSIBLE!!!!!!!!! WILL GIVE LIKE, 5 STARS, & BRAINLIEST; THE WHOLE SHEBANG; (Worth 20 Points!)Krystine has a weekend job advertising an upcoming play. She has two options for being paid. Option A is an hourly wage of $7.00. Option B is a 5% commission on all money made at the play. She plans to work 8 hours each day on Saturday and Sunday. Krystine estimates the play will make about $2,100 this weekend. Which option gives Krystine more earnings this weekend?Part 1Choose the correct answer below.A.Option B gives Krystine more earnings this weekend.B.Option A gives Krystine more earnings this weekend.C.Both options give Krystine the same amount of earnings Which health agency is under the supervision of the American federal government?KairosCDCWHODoctors Without Borders Write the name of a polynomial (using the degree) with the sequence of theoutputs: (5,2,-1,-4, ...}*Type ONE word aThe eighth-grade class has a total of 162 students. The students need to bedivided evenly into homerooms. There needs to be at least 20 students ineach homeroom. List all the possible combinations. Which combinationmakes the most sense? Explain. four water bottles can hold 8 gallons of water how much water can ten big water bottles hold Q6 (i) please i dont know what im doing wrong A rectangular cube of iron is a side 8 cm. What is it volume. In __________ ribosomes can attach to the mRNA and begin translation even though transcription has not been completed. Which of the following statements is true about CO?The carbon and oxygen share electrons.bCarbon is the cation and oxygen is the anion.It is the element cobalt.dIts name is monocarbon monoxide.enone of these