If cos A= -4/5 and A is in the second quadrant, then cos 2A = ?

Answers

Answer 1

Answer:

i think its second pythagreom therom

Step-by-step explanation:

because


Related Questions

A car is traveling down a road at a constant speed of 50 miles per hour. Write an equation that represents the distance traveled by the car, d, for an amount of time, t

Answers

Answer:

 distance divided by rate = time aka D/R=T

Step-by-step explanation:

this is what i learned at least hope it helps

The equation that represents the distance traveled by the car is equal to d = 50 x t.

Speed calculation

To calculate the speed of an object, it is necessary to relate the distance traveled and the time required to travel that distance, so that:

                                                [tex]V = \frac{d}t}[/tex]

Thus, as we are given the value of a velocity and if we are asked for the expression that represents the distance traveled depending on the time, we have:

                                        [tex]50 miles/hour = \frac{d}{t}[/tex]

                                             [tex]d = 50 \times t[/tex]

So, the equation that represents the distance traveled by the car is equal to d = 50 x t.

Learn more about speed calculation in: brainly.com/question/12759408

What is 1/3 plus 3/4

Answers

Answer:

1

Step-by-step explanation:

Find the value of x. Round your answer to the nearest tenth. Don't forget the appropriate units.

Answers

Answer:

this is the ans

Step-by-step explanation:

hope it helps!!!

name the plane represented by the points in the box

A.fbcg C.fecb
B.bade D.fkgi

need now please help ​

Answers

Answer:

The plane represented in the box is: fbcg

Step-by-step explanation:

Given

The attached box

Required

Which of the given points is a plane in the box

To do this, we simply check if the points are connected i.e. if there is a directed between each of the points of the plane.

A. FBCG

Point F links to B, (by drawing a vertical line from F)

Point B links to C, (by drawing a right horizontal line from B to C)

Point C links to G, (by drawing a vertical line from C down to G)

Point G links to F, (by drawing a left horizontal line from G to F)

Hence, FBCG is a plane on the box.

This is not so for other options

You spin the spinner once.

What is P(8)?

Answers

Um do you have a picture to this question I’m confused

True or False: If I solve for the angle measure to the nearest 1/10th of a degree, the answer is 50.90

Answers

360 degrees in the west

The diameter of the logo at the center of a basketball court is 10 feet. What is the area of the logo?

Answers

Answer:

≈78.539816 ft²

≈78.54 ft²

Step-by-step explanation:

Since the logo is in the shape of a circle, the area can be found with the formula:

 πr²

To find r, divide the diameter of the circle by 2 (r stands for radius, the length from the center of the circle to the edge):

10÷2=5

Now that all variables are known, complete the equation to find the area:

πr²π(5)²(PEMDAS, use the exponents first)25 × π≈78.539816 ft² or ≈78.54 ft²

show workk plzzzzzzzzzzzzzz

Answers

Answer:

A. $4594.74

Step-by-step explanation:

To figure this out, use the equation A = P(1 + r/n)^nt. (A is the total principal (P) + interest; r is the decimal form of the annual rate (R), n is the compound, and t is the time in years)

Substitutions added

A = 4000((1 + 0.02/1)^(1(7))

Step 1: We can go on ahead and cancel both the division and multiplication by 1 here.

A = 4000((1 + 0.02)^7)

Step 2: Add 0.02 to 1.

A = 4000(1.02 ^ 7)

Step 3: Find 1.02 to the seventh power. (I rounded it for convenience)

A = 4000(1.14868)

Step 4: Multiply 4000 by 1.14868

A = 4594.74267

Step 5: This is important! Round that answer to the nearest cent.

A = $4594.74, which is A.

The length of a rectangle is 3cm more than the width. The area is 70cm^2. Find the dimensions of the rectangle​

Answers

Let width be x
Length would be x + 3
Area = L * W
Make an equation
(x) * (x+3) = 70
x^2 + 3x = 70
x^2 + 3x - 70 = 0
Quadratic formula
(-3 +/- rt 3^2 - 4 * 1 * (-70))/(2 * 1)
x1 = (-3 + 17)/2, x2 = (-3-17)/2
x = 7, x = -10
Dimension cannot be negative

Solution: width = 7
Length = 10

What would these boxes be? Someone plz help will give brainliest

Answers

x=17
Angle H=53 deg
Angle CIP=133 deg

Combine like terms for the following expressions:

2−3x−x−6

Answers

Answer:

- 4 - 4x

Step-by-step explanation:

2 - 3x - x - 6

2 - 6 - 3x - x

- 4 - 4x

-TheUnknownScientist

What's 5 similarities about autobiography and biography

Answers

Answer:

Step-by-step explanation:

they are both written about a particular individals life

Answer:

A biography, also called a bio, is a non-fiction piece of work giving an objective account of a person’s life. The main difference between a biography vs. an autobiography is that the author of a biography is not the subject.

Biographies include details of key events that shaped the subject’s life, and information about their birthplace, education, work, and relationships. Biographers use a number of research sources, including interviews, letters, diaries, photographs, essays, reference books, and newspapers. While a biography is usually in the written form, it can be produced in other formats such as music composition or film.

Examples of famous biographies include:

His Excellency: George Washington by Joseph J. Ellis

Einstein: The Life and Times by Ronald William Clark

Princess Diana – A Biography of The Princess of Wales by Drew L. Crichton

What is an Autobiography?

An autobiography is the story of a person’s life written by that person. Because the author is also the main character of the story, autobiographies are written in the first person.

The purpose of an autobiography is to portray the life experiences and achievements of the author. Therefore, most autobiographies are written later in the subject’s life.

They often begin during early childhood and chronologically detail key events throughout their life. Autobiographies usually include information about where a person was born and brought up, their education, career, life experiences, the challenges they faced, and their key achievements.

Step-by-step explanation:

Uma professora de artes pediu aos alunos para montarem mosaicos unindo peças. Nesse mosaico, essas peças deveriam ficar sempre ligadas pelos vértices, não poderiam se sobrepor e não deveria sobrar espaço entre elas. Além disso, para fazer esse mosaico, essa professora solicitou que todos os alunos utilizassem octógonos regulares, como o que está apresentado abaixo.

M100839H6_1

Para compor esse mosaico, junto com esses octógonos, os alunos tinham à sua disposição as peças do quadro abaixo.

M100839H6_2

Quais dessas peças os alunos poderiam escolher para compor esse mosaico?

I e III.
I, III e IV.
I e IV.
II, III e IV.
III e IV.

Answers

Answer:

coloquei a letra d- II, III e IV

Step-by-step explanation:

Answer:

é a letra D (II, III e IV)

Step-by-step explanation:

se você reparar no ângulo interno da figura do octógono está mostrando 135º e a primeira figura que no caso não encaixa mostra 60º, fazendo essa soma daria um total de 195º, o que passa de 180º que é a metade de uma circunferência, então não daria certo, ficaria uma parte sobrando, não se encaixando no mosaico.

Reasoning A cone with radius 6 and height 12 has its radius quadrupled. How many times

greater is the volume of the larger cone than the smaller cone? Use pencil and paper. Explain

how the volume of the cone would change if the radius were divided by four.

The volume of the larger cone is

times greater than the volume of the smaller cone.

Enter your answer in the answer box and then click Check Answer.

Clear All

Check Answer

All parts showing

Answers

Answer:

Step-by-step explanation:

Reasoning A cone with radius 6 and height 12 has its radius quadrupled. How many times

greater is the volume of the larger cone than the smaller cone? Use pencil and paper.

Volume of a cone = πr² h/3

r = 6, h = 12

= π × 6² × 12

= 452.39 cubic units

Speeds of pulleys are inversely proportional to the length of their diameter. Diameter of pulley A is 20 cm. and diameter of pulley B is 10 cm. If B turns at 348 ​rpm, how fast does pulley A​ turn?

Answers

Answer:

174 rpm

Step-by-step explanation:

The question says that the speed is inversely proportional to the length. Thus, Inverse means, as the diameter increases, the speed reduces, or as the diameter reduces, the speed increases.

Thus, from the question, if diameter A is 20, and B is 10, then definitely, the speed will increase from 348 to a higher rate. Mathematically, we have

20 / 10 = 348 / x, where x is the missing speed.

2 = 348 / x

x = 348 / 2

x = 174 rpm

Therefore, the pulley A must have been running at a speed of 174 rpm

Please be a help and help with my math and show your work, please.

Answers

Answer:

area = 2184 ft²

Step-by-step explanation:

height² = 60² - 36² = 3600 - 1296 = 2304

height = √2304 = 48

base = 36 + x

x² = 73² - 48² = 5329 - 2304 = 3025

x = √3025 = 55

base = 36 + 55 = 91

area = 1/2(h)(b) = 1/2(48)(91) = 2184 ft²

Please help! :(. "You can use displacement to find the volume of an irregular object, such as a stone. Suppose a 2 foot by 1 foot tank is filled with water to a depth of 8 in. A stone is placed in the tank so that it is completely covered, causing the water level to rise by 2 in. Find the volume of the stone."

Answers

Answer:

0.3332 ft³

Step-by-step explanation:

Given that:

Length and width of tank = 2 feet by 1 feet

Volume of water displaced by the stone = 2 inches

The volume of Stone :

Rise in water level * length and width of tank

Converting inches to feet :

1 inch = 0.0833 feets

2 inches = 0.0833 * 2 = 0.1666 feets

Volume of stone :

0.1666 ft * 2 ft * 1 ft

= 0.3332 ft³

Need math help worth 20 point helppppppp plzzzzz

Answers

Answer:

Hi! I believe the answer is B. 3

Step-by-step explanation:

☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆

☆Brainliest is greatly appreciated!☆

Hope this helps!!

- Brooklynn Deka

Find the common difference of the arithmetic sequence 13, 9, 5,

Answers

Answer:

4

Step-by-step explanation:

Mark me as brainlist ez

Answer:

-4

Step-by-step explanation:

13, 9, 5, 1, -3, -7, .......

PLZ HELP! QUESTION IS BELOW! :D

Answers

Answer:

40 ft^2

Step-by-step explanation:

Think of the area of the green rectangle first. Then subtract the area of the smaller brown rectangles.

area of green carpet = 4 ft * 12 ft - 3 ft * 2 ft - 1 ft * 2 ft

area = 48 ft^2 - 6 ft^2 - 2 ft^2

area = 40 ft^2

Answer: 40 ft^2

The Jayden family eats at a restaurant that is having a 15% discount promotion. Their meal costs $78.12 before the discount, and they leave a 20% tip. If the tip applies to the cost of the meal before the discount, what is the total cost of the meal? Round your intermediate calculations and answer to the nearest cent.

Answers

Answer:

82.02

Step-by-step explanation:

78.12 x 0.2 = 15.62 tip

78.12 x 0.15 = 11.72 discount

78.12-11.72 = 66.40 discounted meal price

66.40 + 15.62(tip) = 82.02 total meal price

What is the GCF in the following expression, 6y+18 PLEASE HELP ASPAP!!!

Answers

It’s gonna be 6
Hope ya have a good one ^v^

What is the vertex of function f(x)=(x-3)(x+5)?

Answers

Answer:

( − 1 , − 16 )

Step-by-step explanation:

In ΔJKL, the measure of ∠L=90°, LK = 12, KJ = 37, and JL = 35. What ratio represents the secant of ∠K?

Answers

Answer:

Sec <K  = 37/12

Step-by-step explanation:

Given the following measure

∠L=90°

LK = 12

KJ = 37, and

JL = 35.

Considering angle K

JL = opposite

KJ =hypotenuse

LK = adjacent

Using SOH CAH TOA identity

Cos theta = adj/hyp

Cos m<K = LK/KJ

cos m<K = 12/37

Since sec theta = 1/cos thets

Sec <K = 1/cos<K

Sec <K = 1/(12/37)

Sec <K  = 37/12

Condense logarithmic equation PLEASE!

Answers

This is the answer: log_5(d^4 * k^12)

What does parallel mean? Can you give an example of things that are parallel?
Directions
• Your initial response should be 3-4 sentences in length, reflecting on the prompt
above and answering all parts of the prompt.

Answers

Answer:

Defetion meaningnumbermeters
Parallel is when something is up and down, the opposite of parallel is horizontal. When you think of both of these, think about a picture. When a picture is straight up and down it is parallel. When a picture is sideways it is horizontal. I hope this helps you!!

help please ????????

Answers

Answer:

Check out ironic p a n d u h on you tube

Step-by-step explanation:

the awnser is nowhere

an administrative assistant at a software company often provides breakfast when there is a morning meeting. for last weeks sales, she purchased 3 dozen doughnuts and 5 dozen croissants, spending a total of $60. in preparation for yesterday's safety meeting, she spent $65 on 4 dozen doughnuts and 5 dozen croissants. assuming she purchased the items at the same bakery both times, how much does a dozen of each cost?

Answers

Answer:

donuts:  $5.00

croissants: $9.00

Step-by-step explanation:

c - croissants

d - donuts

(1) 3d + 5c = 60        

(2) 4d + 5c = 65

solve for 5c in equation (1)

5c = 60 -3d

substitute 5c = 60-3d into (2)

4d + (60 - 3d) = 65

d + 60 = 65

d = 5      

to find c substitute d = 5 into (1)

3(5) + 5(c) = 60

15 + 5c = 60

5c = 45

c = 9

The floor tiles in the Jackson family's kitchen are squares
that measure 8 inches to a side. Each grid square in the
drawing measures inch to a side.
Which is the scale of the drawing?

Answers

Answer:

Option D, The scale of the drawing is 1 inch : 27 inch

Step-by-step explanation:

The complete question is

The floor tiles in the Jackson family’s kitchen are squares that measure 6

3 /4  inches to a side. Each grid square in  the drawing measures 1 /4  inch to a side. Which is the scale of the drawing?

A. 1 : 8  3 /4

B. 1 : 10

C. 1 /4 : 27

D. 1 : 27 n

Solution

Given,

Measurement of the tile = 27/4 inches

Side of the drawing = 1/4 inches

The scale of the drawing

1/4 inch of drawing = 27/4 inch of tile

This gives - 1 inch of the drawing = 27 inch of the tile

The scale of the drawing is 1 inch : 27 inch

Hence, option D is correct

Find the exact value of x.

Answers

Answer:

x = 6

Step-by-step explanation:

(3√2)² = 18

using the Pythagorean theorem:

x² = 18 + 18 = 36

x = √36 = 6

Other Questions
can somebody please help me with this math problem Villi and microvilli help to absorb nutrients in your small intestine.TrueFalse Activity 2: Let's Compare! Instruction: Using the arrange word from the activity 1, comparesimilarities and differences of the artifacts or design to the Philippines artifacts.6. IDHMNE7. RAEPNSI URG8. EACICMR9. GLRNIAO10. EAPCTR Young people spend too much time on their mobile phones.Do you agree or disagree?NotesWrite about:1. communication2. friendship You start at (0, 2). You move down 4 units. Where do you end? WXYZ is a rhombus. What is m of angle XYZ? Use the galvanometers to determine the amount and direction of the induced current. Which galvanometer isindicating a current of 4 mA? Compare the two integers: -10 and -3 Why should the US go to or join a war? Can anyone please help me on this What climate did the early river valley civilizations share How is the term asepsis used?A. To describe the procedures health care providers follow in patientcare settings to keep infections from spreadingB. To describe the process of explaining medical procedures topatients before treating themC. To describe the requirements and privacy laws for information inpatient medical chartsD. To describe the health of patients in terms of how quickly they arerecovering and how well they feel write a fact and an opinion about cameras (please help i will give brainliest) please silve this question fast Im confused please help me 12.The table below shows the budget for the McDougal Family.Budget Item AmountIncome $3,500Income Taxes $350College Savings $315Retirement Savings $200Emergency Fund Savings $115Living Expenses $2,400What percentage of the total income is the McDougal family saving for college?12%8.5%9%10.5% Spanish II Chapter 13can a spanish speaking person please help me . A green colour substance 'X' is heated strongly. Its colour changes to 'Y' and smell of burning sulphur is given out. a. Name the substances X and Y. b. Name the type of reaction taking place. c. Write the balanced chemical equation for the reaction. Throughout the history of film and theater in the United States, was there a period when Deaf actors may have had an advantage over hearing actors? Why or why not? Do you think that is the case today? "What is the GCF (greatest common factor) of 60x^3- 10x^2+ 30x?