20 points & Brainliest to the one who gets ALL of them correct! NEED HELP ASAP!!! Due today!!!

Verify these Identities & SHOW YOUR WORK:

1. cosx−cosxsin²x = cos³x

2. [tex]\frac{sinx}{1+cosx}[/tex] = [tex]\frac{1-cosx}{sinx}[/tex]

3. cos⁴b−sin⁴b = 1−2sin²b

4. [tex]\frac{siny+cosy}{siny}- \frac{cosy-siny}{cosy}[/tex] = [tex]\frac{secy}{cosy}[/tex]

5. (secx−tanx)² = [tex]\frac{1-sinx}{1+sinx}[/tex]

HELP!!!

Answers

Answer 1

Answer:

30

Step-by-step explanation:

Answer 2

Answer: go on mathaway!!!

Step-by-step explanation:

This dosent really help with ur question but mathaway is free and got me through math


Related Questions

How can you use problem-solving strategies in solving personal, professional, and mathematical problems? Explain in 5-7 sentences and I WILL MARK YOU THE BRAINLIEST!!!

Answers

Answer:

You are fortunate that there are several excellent algorithms textbooks on the market. Many of them (including Introduction to Algorithms) have material on not just the algorithms, but the techniques you can use to develop algorithms. I recommend that you learn techniques such as divide-and-conquer, dynamic programming, greedy algorithms, and amortized analysis.

Step-by-step explanation:

Hope this answer helps you :)

Have a great day

Mark brainliest

When trying to solve a certain problem, different strategies must be applied that have the ability to solve the question in the most favorable way.

Thus, as a first step, the problem that is taking place, and the severity of it, must be identified. Then, proposals for solving the problem must be prepared, considering the pros and cons of each one, as well as their eventual cost. Subsequently, a main option and a plan B must be chosen with which to solve the question. Finally, the resolution plan must be executed.

Learn more in https://brainly.com/question/7208889

A farmer wants to fence in a rectangular plot of land adjacent to the north wall of his barn. No fencing is needed along the barn, and the fencing along the west side of the plot is shared with a neighbor who will split the cost of that portion of the fence. If the fencing costs $20 per linear foot to install and the farmer is not willing to spend more than $7000, find the dimensions for the plot that would enclose the most area. (Enter the dimensions as a comma separated list.)

Answers

Answer:

The dimensions for the plot that would enclose the most area are as follows:

Width  = 116.67 ft

Length = 175 ft.

Step-by-step explanation:

Note: Kindly refer to the attached diagram where:

x = Length of the rectangular area

y = Width of the rectangular area.

The fencing along the west side of the plot is shared with a neighbor who will split the cost of that portion of the fence. This implies that it is $10 per foot. Otherwise, it will be $20 per foot. Since no fencing is needed along the barn, it implies that there is no fence along the northern length.

Since the farmer is not willing to spend more than $7000, we have:

10y + 20x + 20y = 7000

20x + 30y = 7000

Divide through by 20, we have:

x + 1.5y = 350

x = 350 - 1.5y …………………………. (1)

The fenced area is

A = x * y ………………………………….. (2)

Substituting equation (1) into (2), we have:

A = (350 - 1.5y)y

A = 350y - 1.5y^2 ……………. (3)

To maximize A, equation (3) is differentiated with respect to y and equated it to 0 as follows:

That is,

A'(y) = 350 - 3y = 0

Solving for y, we have:

y = 350/3

y = 116.67 ft

Substituting y = 116.67 for y in equation (1), we have:

x = 350 - (1.5 * 116.67)

x = 175ft

Therefore, the dimensions for the plot that would enclose the most area are as follows:

Width  = 116.67 ft

Length = 175 ft.

Find the coordinates of the points that are 20 units away from the origin and have a y-coordinate equal to −12.

Answers

9514 1404 393

Answer:

  (-16, -12), (16, -12)

Step-by-step explanation:

The given values (side length and hypotenuse) have the ratio ...

  12 : 20 = 3 : 5

This suggests that the triangle formed by the axes and the point 20 units from the origin is a 3-4-5 triangle, and the remaining side is 16 units from the y-axis. That means the points of interest are ...

  (-16, -12) and (16, -12)

Distinguish rational numbers from the following.
a. √25 b. √23 c. 1.01 d. 2.323223222... e. 3.786

Answers

Answer:

spongebob at the bottom of the sea

Step-by-step explanation:

In a plain, robust, conversational style, the author known as “Elena Ferrante” has captivated readers worldwide with her chronicle of a complicated friendship between two women.

look at pic 10 pts will mark brainilest zion ihsjzxu

Answers

Answer:

36

Step-by-step explanation:

You first solve 6x=72 which you divide 72/6 and get the answer x=12. You then replace x with 12 and do the order of operations. 12-3 then 9x4.

Answer:

Multiply using the distributive property.

B.

Please mark brainliest!

Find the volume of the prism.

Answers

Volume of prism= 6x(4+(1/5))x(8+(1/3))
Volume of prism= 3.024 yd^3

Explanation: Volume= L x W x H

40 POINTS! Match each set of vertices with the type of triangle they form.

Answers

Answer:

#1 ((2, 0), (3, 2), (5, 1)) = right isoceles triangle ✔️

#2 ((4, 2), (6, 2), (5, 3.73)) = acute isosceles triangle ❌

so it is not part of graph

#3 ((-5, 2), (-4, 4), (-2, 2)) = Acute scalene triangle ✔️

#4 ((-3, 1), (-3, 4), (-1, 1)) = Right scalene triangle (or right triangle)✔️

#5 ((-4, 2), (-2, 4), (-1, 4)) = Obtuse scalene triangle ✔️

Step-by-step explanation:

the triangles are correct

Answer:

(2,0), B(3,2),C(5,1) is isosceles right angel

(-5,2), B(-4,4), C(-2,2) acute scalene triangle

(-3,1), B(-3,4), C(-1,1) right angel

(-4,2), B9-2,4), C(-1,4) obtuse scalene triangle

Step-by-step explanation:

Brainliest, 10 Points, & Thanks if answer to these questions!!!!!!!!

Answers

Answer:

D

Step-by-step explanation:

+1 and -1 change the x postion

help me pleaseeeeeeeeeeeee

Answers

Answer:

|7000 - w| < 1000

Step-by-step explanation:

6000 < w < 8000

Subtract 7000 from the three "sides."

-1000 < w - 7000 < 1000

|w - 7000| < 1000

|7000 - w| < 1000

Reorder the premises to show that the conclusion follows as a valid consequence from the premises. You may restate them in if-then form or by their contrapositives. (5 pts)
(a) Things that taste good are expensive.
(b) Things that smell good taste good.
(c) Every object to the left of the tree is blue.
(d) All blue objects smell good. :.
Every object to the left of the tree is expensive.

Answers

Step-by-step explanation:

For this question, what we have to do is to rewrite and form some of these statements with their contrapositives

here is the reordering;

1. if Object is at the left of the tree, then it is blue

2. If the object is blue then it smells good.

3. If thus thing smells good then it tastes good.

4. If it tastes good then it is expensive

∴ every object to the left of the tree is expensive

Jeff says the figure below is a rhombus. Is he correct? *

Answers

Answer:

yes it is

Step-by-step explanation:

it is quadrilateral

Answer:

yes

Step-by-step explanation:

just look up rhombus and then look at the pictures

In a sample of 230 teenagers, 202 would like to have smaller class sizes at their school. Find the sample
proportion, the margin of error, and the interval likely to contain the true population proportion. If
necessary, round your answers to the nearest percent.

Answers

Answer:

The sample proportion is 0.88.

The margin of error is of 0.04.

The interval likely to contain the true population proportion is (0.84,0.92).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the z-score that has a p-value of [tex]1 - \frac{\alpha}{2}[/tex].

Margin of error:

The margin of error is of:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

Sample of 230 teenagers, 202 would like to have smaller class sizes at their school.

This means that [tex]n = 230[/tex], and that the sample proportion is:

[tex]\pi = \frac{202}{230} = 0.88[/tex]

The sample proportion is 0.88.

Standard 95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a p-value of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

Margin of error:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]M = 1.96\sqrt{\frac{0.88*0.12}{230}}[/tex]

[tex]M = 0.04[/tex]

The margin of error is of 0.04.

Confidence interval:

Sample proportion plus/minus margin of error. So

0.88 - 0.04 = 0.84

0.88 + 0.04 = 0.92

The interval likely to contain the true population proportion is (0.84,0.92).

ally and bo share 60$ in the ratio 1:4 how much money does bo get

Answers

Answer: $240

Step-by-step explanation:

So 60 represents the 1, so multiply 60 by 4

at 90kph, how far do you travel in 6 hours​

Answers

Answer:

540 km

Step-by-step explanation:

You find distance by multiplying rate and time. Rate is 90, and time is 6. 90 x 6 = 540 km

Find the area of a regular
polygon with 6 sides that has a
perimeter of 42 inches and an
apothem of 5 inches,

Answers

Answer:

The area of a regular polygon is A = (1/2)ap, where a is the apothem and p is the perimeter of the polygon.  

The apothem is 8 inches and the perimeter is 6(7) = 42 since there are 7 sides of 6 inches.  

Then the area is

A = (1/2)(8)(42) = 336/2 = 168 in2  

I hope this helped!

Step-by-step explanation:

Mark me as brainlist pleasee

the ratio of berries to oranges is 10:1 if there are 25 oranges, how many berries are there?​

Answers

Answer:

250 berries

Step-by-step explanation:

berries : oranges

10              1

We have 25 oranges so we need to multiply each side by 25

berries : oranges

10*25          1*25

250               25

There are 250 berries

Answer: 250 berries

We can set up the proportion:

(10/1)=(x/25)

Then solve for x

if gh¢400.00 is deposited at a bank at 10 per annum compounded quarterly, how long will it take the deposit to double it value.​

Answers

Answer:

~ 7 years

Step-by-step explanation:

2 = (1 + .1/4)^(4t)

2 = (1.025)^(4t)

Take the log of both sides

log2 = 4t * log1.025

divide both sides by log1.025

log2/log1.025 = 4t

28.07103452593863 = 4t

Divide both sides by 4

7.017758631484657 = t

~ 7 years

If f(x) = x/2 -3 and g(x) = 3x² + x - 6, find (f + g)(x). O A. 3x O B. 3x² + 3x-9 3x O C. 3.x2 + x - 3 O D. 4x2-9​

Answers

Answer:

4x2-9

Step-by-step explanation:

it would be that because the number is in the c acis

The pH scale measures how acidic or basic a substance is. Lemon juice is said to have a pH of less than 4 and greater than 1.5. Model the normal range of pH values of lemon juice, using a compound inequality.

1.5 > x > 4
1.5 < x < 4
1.5 ≤ x ≤ 4
1.5 ≥ x ≥ 4

Answers

Answer: 1.5 < x < 4

Step-by-step explanation:

Can somebody help me with this question

Answers

Answer:

y = -⅓x + 7

Step-by-step explanation:

Given the two points that lie on the line (3, 6) and (-3, 8), we can find the equation without the grid by finding the slope (m) and y-intercept (b).

The equation would be written in the form of y = mx + b (slope-intercept form):

✔️Find m:

Slope (m) = change in y/change in x

Slope using (3, 6) and (-3, 8), would be:

Slope (m) = (8 - 6)/(-3 - 3) = 2/-6

m = -⅓

✔️Find b:

Substitute (x, y) = (3, 6) and m = -⅓ into y = mx + b to find b

6 = -⅓(3) + b

6 = -1 + b

6 + 1 = b

b = 7

✅Write the Equation:

Substitute m = -⅓ and b = 7 into y = mx + b

Thus,

y = -⅓x + 7

Simply the following ratio 1000:540:780

Answers

This is my workings

Find the value of x to the nearest degree.
16
7
Not drawn to scale

Answers

Answer:

66°

Step-by-step explanation:

Given the right angled triangle :

Opposite side = 16

Adjacent side = 7

Using trigonometric relation :

Tan θ = opposite / Adjacent

Tan x = (16/7)

x = tan^-1(16/7)

x = 66.37°

x = 66°

The sum of three numbers is 28. The second number is three times the first and the third is 7 less than the second. What are the numbers

Answers


First term: 5
Second: 15
Last : 8

Equation:

x+3x+3x-7=28

Solving:

3x+3x+x=7x

7x-7=28

7x=28+7

7x=35

x=5

Plug 5 into the equations and you’ll get:

First term = 5

Second term = 15

Third term = 8

1.05^x=2
Solve for x

Answers

1.05^x = 2

Apply export rule ( logarithm s)

Xln1.05 = ln2

Divide both sides by ln1.05

X = ln2/ln1.05

X = 14.206

Round the answer as needed.

A piece-wage earner collected the following weights of coffee beans each day over a week:13.3kg,10.8kg,14.4kg and 12,9kg.if she is paid at K5.80 per kilogram, estimate his earning for the week .note do not round off the rate payment​

Answers

Answer:

14.4 should be around 14kg

12,9kg should be rounded to 12

How many prime numbers less than 20

Answers

Answer:

Prime numbers less than 20 are 2, 3, 5, 7, 11, 13, 17 and 19

Step-by-step explanation:

Can you help me with this question? 15 points and brainliest if right!!

Answers

Hi um I think you posted a picture of something else other than the question!!

How to take a screenshot on an HP laptop

Press the Windows key and Print Screen at the same time to capture the entire screen. ...

Open an image editing program (Microsoft Paint, GIMP, Photoshop, and PaintShop Pro will all work).

Open a new image and press CTRL + V to paste the screenshot.

If the length of EG is 22, find the length of a EQ

Answers

Answer:

A. 11

Step-by-step explanation:

EQ is half of EG

so 22/2 = 11

EQ is 11 cause EG is a segment that has a measure of 22 and EQ is half of EG as shown is the diagram and in order to get 11 , you would do 22/2.

ANSWER: 11

A factory manufactures motorcycles. One of its employees, working in the quality control department, checks the first 10 and the last 10 motorcycles manufactured in a day. This is what type of sampling?

Answers

Answer:

Convenience sampling

Step-by-step explanation:

When sampling is done based in degree of ease or samples picked from observations that are easily accessible rather than prioritizing randomness or selection which will most be representative of the population, then such sampling is called convenience sampling. In some texts, it is also referred to as grab sampling as researchers choose from close, easy to reach samples. In the scenario above, the quality control takes the easy procedure of checking the first and last 10 motorcycles as this is easier than having to take samples at random tune intervals which will be a better representation of the entire motorcycles.

The box plots below show the math scores of students of two different classes, which statement is correct

Answers

Answer:

B

Step-by-step explanation:

Given the data:

Class A 55 72 75 89 95

Class B 55 70 75 94 100

CLASS A :

Minimum - 55

Lower quartile - 72

Median - 75

Upper quartile - 89

Maximum - 95

CLASS B :

Minimum - 55

Lower quartile - 70

Median - 75

Upper quartile - 94

Maximum - 100

Evaluating the statements given :

The median score of Class A is greater than the median score of Class B.

Median A = 75 ; Median B = 75 (median are equal), hence, A is not true

The lower quartile of Class A is greater than the lower quartile of Class B.

Lower quartile A = 72 ; Lower quartile B = 70 (A is greater than B) , hence, B is true

The upper quartile of Class A is greater than the upper quartile of Class B.

Upper quartile A = 89 ; Upper quartile B = 94 (A is less than B) , hence, statement is not true

The maximum score of Class A is greater than the maximum score of Class B.

Maximum A = 94 ; maximum B = 100 ; A < B ; Hence, statement is not true

Other Questions
Can somebody help me Which of the following best descifrar the graph shown below? What happens to an electroscope when a negatively charged rod is brought close to the metal sphere at the top? Question 5 of 10Which of the following sentences is punctuated correctly?A. I think, you should have taken the dog for a walk.B. Those are his not mine.C. By the way your garbage can is in the street.O D. Furthermore, you left the groceries outside.SUBMITEnglish You gave one third of a pan of brownies to Sally and one sixth to Fletcher. What fraction of the pan of brownies remained? Write your answer as a proper fraction. Abby can buy an 4-pound bag of dog food for $4.08 or a 9-pound bag of the same dog food for $6.93. Which is the better buy? Plutonium-238 is a radioactive element that decays over time into a less harmful element at a rate of 0.8 % per year. A power plant has 50 pounds of plutonium-238 to dispose of. How much plutonium-238 will be left after 10 years Help me please if you can't don't touch it There are many different alternative energy sources including:1Tidal. 2Wind. 3Solar. 4Waterfall. Match the Type of alternative energy you would most likely find in each region.Alta. N.S. B.C. Ont. What is not APA formatting what was the result of Pontiacs Rebellion Which sentence in the story best indicates that it is an emergence creation story?In the beginning all men lived together in the lowest depths, in a region of darkness and moisture; their bodies were misshapen and horrible,and they suffered great misery.By appealing to Myuingwa (a vague conception of the god of the interior) and Baholinkonga (plumed serpent of enormous size, genius of water)their old men obtained seed from which sprang a magic growth of cane.The cane grew to miraculous height and penetrated through a crevice in the roof overhead, and mankind climbed to a higher plane. Here wasdim light and some vegetation. Another magic cane brought them to a higher plane, with more light and vegetation, and here was the creationof the animal kingdom. Singing was always the chief magic for creating anything. In like manner, they rose to the fourth stage or Earth; some sayby a pine tree, others say through the hollow cylinder of a great reed or rush.This development was accompanied by singing-some say by the Magic Twins, the two little war gods; others say by the mockingbird. At anyrate, it is important to observe that when the song ran out, no more people could get through and many had to remain behind.However, the outlet through which man came has never been closed, and Myuingwa sends through it the germs of all living things. Explain how to use a graph of the function f(x) tofind f(3). need help with english pls PLEASE HELP THIS IS THE LAST ONE!!!!! which gender is mostly violated and why? How did religion change in the former Byzantine Empire now that it was part of the Ottoman Empire? *LANGUAGE ART TEST**50marks**Time:1hour* *10:15am - 11:15am*1. A prefix is letters that come at the _____ of a word.a. end b. beginning c. middle d. top2. What is the root, or base word, in the word preheat? a) heat b. preheat c. heatpre Question 3Q. What is the prefix in the word untie? a.tie b. unti c. un d. pre Question 4Q. The prefix re, like in the word replay means- a. not b. before c. again d. dis Question 5Q. Read the sentence below. Tom and Jerry disagreed on what TV show to watch. That means they-a. did not agree b. did agree c.agreed again d. stopped agreeing Question 6Q. A suffix is letters that come at the _____ of the word. a. on top b. rhyme c. beginning d. end Question 7Q. The suffix less, like in the word fearless means:a. full of b. without c. with Question 8Q. Look at the word belowunchangeable This word has-a. a prefix b. a suffix c. a prefix and a suffix d. neither Question 9Q. Which suffix can you add to the word "reason" to make a new word?a. -able b. -ful c. -ion Question 10Q. What does the word "tireless" mean?a. always feeling tired b. never feeling tired c. feeling less tired than someone else Question 11Q. If you wanted to say someone is not helpful, which word would you use?a. inhelpful b. unhelpful c. helpfulless Question 12Q. Which of these words means 'not sure'a. undone b. uncertain c. dissure Question 13Q. What prefix would you add to the word 'finished' to show that there is still some work to be done?a. un- b. dis- c. mis- Question 14Q. What does the prefix 'dis' do to the word appeared in this sentence?The cat disappeared before her very eyes.a. It tells you that the cat appeared bigger than before. b. It tells you that the cat vanished. c. It tells you that the act appeared to be further away. Question 15Q. What does the prefix 'dis' do to the word appeared in this sentence?The cat disappeared before her very eyes.a. It tells you that the cat appeared bigger than before. b. It tells you that the cat vanished. c.It tells you that the act appeared to be further away.Section B: Write 10 idioms you know, the meaning and make a sentence with it Best of luck What process takes place when hydrogen-3 and hydrogen-2 combine to formhelium-4 plus a neutron?A. FusionB. Alpha decayC. Beta decayD. Fission plays/strategies that a team can use to be successful in stopping the other team in sports