Find (f ∙ g)(2) when f(x) = and g(x) = x + 9.

the trigonometric identity is proven below

cos(3x/2 - α) = cos(3x/2)cos(α) + sin(3x/2)sin(α)

tan(α) = sin(α) / cos(α)

sec(α) = 1 / cos(α)

therefore:

cos(3x/2 - α) = cos(3x/2)cos(α) + sin(3x/2)sin(α)

The study of the correlation between a right-angled triangle's sides and angles is the focus of one of the most significant branches of mathematics in history: trigonometry. Hipparchus, a Greek mathematician, introduced this idea.

From the question:

The following trigonometric identities can be used to demonstrate the trigonometric identity cos(α) - tan(α) - cos(3x/2 - α) = sec(α)

cos(3x/2 - α) = cos(3x/2)cos(α) + sin(3x/2)sin(α)

tan(α) = sin(α) / cos(α)

sec(α) = 1 / cos(α)

When we enter these identities into the equation's left-hand side (LHS), the following results:

cos(α) - tan(α) - cos(3x/2 - α)

= cos(α) - sin(α)/cos(α) - cos(3x/2)cos(α) - sin(3x/2)sin(α)

By locating a common denominator for the first two terms, we can reduce the expression:

[tex]cos(\alpha ) - sin(\alpha )/cos(\alpha )[/tex]

= [tex](cos^2(\alpha ) - sin^2(\alpha )) / cos(\alpha )[/tex]

= [tex]cos(2\alpha ) / cos(\alpha )[/tex]

Reintroducing this into the LHS results in:

[tex]cos(\alpha ) - tan(\alpha ) - cos(3x/2 - \alpha )= cos(2) / cos(\alpha ) - cos(3x/2)cos(\alpha ) - sin(3x/2)sin(\alpha )[/tex]

Using the identity [tex]cos(2\alpha ) = 1 - 2sin^2(\alpha ),[/tex] we can simplify the expression further:

cos(α) - tan(α) - cos(3x/2 - α)

= [tex](1 - 2sin^2(\alpha )) / cos(\alpha ) - cos(3x/2)cos(\alpha ) - sin(3x/2)sin(\alpha[/tex])

= [tex](1 - 2sin^2(\alpha ) - cos^2(3x/2 - \alpha ))[/tex] / cos(α) (using the identity[tex]sin^2(x) + cos^2(x) = 1)[/tex]

Using the identity, we can now reduce the complexity of the equation in the numerator:

cos(3x/2 - α) = cos(3x/2)cos(α) + sin(3x/2)sin(α)

Substituting this identity into the numerator, we get:

[tex]1 - 2sin^2(\alpha ) - cos^2(3x/2)cos^2(\alpha ) - 2sin(3x/2)cos(3x/2)sin(\alpha )cos(\alpha )[/tex]

In order to further simplify the expression, we can use the identity

sin(2x) = 2sin(x)cos(x):

[tex]1 - 2sin^2(\alpha ) - cos^2(3x/2)cos^2(\alpha ) - sin(3x)sin(\alpha )[/tex]

Now, using the identity[tex]cos^2(x) + sin^2(x) = 1,[/tex] we can simplify the expression to:

[tex]cos^2(\alpha ) - sin^2(\alpha ) - cos^2(3x/2) + cos^2(3x/2)sin^2(\alpha )[/tex]

Using the identity[tex]cos(2x) = 1 - 2sin^2(x)[/tex], we can further simplify the expression to:

[tex]cos(\alpha )cos(2\alpha ) - cos^2(3x/2)(1 - sin^2(\alpha ))[/tex]

[tex]= cos(\alpha )(1 - 2sin^2(\alpha )) - cos^2(3x/2)cos^2(\alpha )sin^2[/tex]

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The correct answer is option C: 4 x 11/ 7 x 15.

What is the fractions?

A fraction is a numerical quantity that represents a part of a whole. It is expressed as one number, called the numerator, written above a line, and a second number, called the denominator, written below the same line.

The product of 4/7 and 11/15 is:

(4/7) x (11/15)

= (4 x 11)/(7 x 15) (Multiplying the numerators and denominators separately)

Hence, the correct answer is option C: 4 x 11/ 7 x 15.

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The side lengths from least to greatest are HJ, HI, IJ, JK and IK

A triangle is a three-sided polygon that consists of three edges and three vertices.

Angle H is 67 degrees

∠HIJ is 51 degrees

∠HJI is 61 degrees

Angle K is 63 degrees

∠KJI is 70 degrees

∠KIJ is 57 degrees

From least to greatest

HJ<HI<IJ<JK<IK

Hence, the side lengths from least to greatest is HJ, HI, IJ, JK and IK

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Bank A's CD would earn a greater amount of interest than Bank B's CD.

The interest is greater by $369.91

To determine which CD will earn the greater amount of interest, we can calculate the interest earned by each CD over the 3-year period.

For Bank A's CD, the interest earned would be:

I = P * r * t

I = $12,000 * 0.03 * 3

I = $1,080

For Bank B's CD, the interest earned would be:

A = P * (1 + r/n)^(nt)

A = $12,000 * (1 + 0.025/12)^(123)

A = $12,710.09

The interest earned on Bank B's CD would be the difference between the total amount earned and the original principal:

I = A - P

I = $12,710.09 - $12,000

I = $710.09

Hence, Bank A's CD would earn a greater amount of interest

The interest is greater by

$1,080 - $710.09

= $369.91

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So the lowest price that yields a revenue of $7840 is $32 and the highest price is $64.

The first ten integers are the basic numbers in mathematics. The range of these vital values is 0 to 9. Basic integers in the 0 to 9 range include 0 through 1, 2, 3, 4, 5, 6, 7 and 8.

The total revenue from selling x units is given by:

R = xp

Substituting the demand equation p = 128 - 0.04x, we get:

R = x(128 - 0.04x)

R = 128x - 0.04x²

To find the prices that yield a revenue of $7840, we can set R equal to 7840 and solve for x:

7840 = 128x - 0.04x²

0.04x² - 128x + 7840 = 0

Dividing both sides by 0.04, we get:

x² - 3200x + 196000 = 0

Using the quadratic formula, we can solve for x:

x = [3200 ± √(3200² - 4(1)(196000))] / 2

x = [3200 ± √(10240000)] / 2

x = [3200 ± 3200] / 2

x = 1600 or x = 2400

Therefore, the corresponding prices that yield a revenue of $7840 are:

p = 128 - 0.04x

p = 128 - 0.04(1600) = 64 dollars

p = 128 - 0.04(2400) = 32 dollars

So the lowest price that yields a revenue of $7840 is $32 and the highest price is $64.

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False, the given two proportions are not equal.

In this section, the terms ratio and percentage are defined. Both ideas play a significant role in mathematics. Many examples where the notion of the ratio is highlighted may be found in daily life, such as the rate of speed (distance/time) or price (rupees/meter) of a substance.

An equation known as proportion shows that the two ratios presented are equal to one another.

The two given proportions are:

100/210 = 290/340

Simplifying the two we have:

100/210 = 10/21

290/340 = 29/34

We see that the simplified form of the two proportions are different.

Hence, False, the two proportions are not equal.

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Answer:

Step-by-step explanation:

To start, let's use algebra to set up some equations based on the information we have. We know that Trip has a total of 15 coins and their total value is 95 cents. Let's call the number of nickels Trip has "n" and the number of dimes "d". Then we can write:

n + d = 15 (since Trip has a total of 15 coins)

0.05n + 0.1d = 0.95 (since the total value of the coins is 95 cents)

Next, we know that four of the coins are each worth twice as much as the rest. Let's call the value of the "rest" coins "x". Then the value of the four coins that are worth twice as much is 2x. We can set up an equation based on the total value of the coins using these values:

4(2x) + 11x = 95

Simplifying this equation, we get:

19x = 95

x = 5

Now we know that each of the "rest" coins is worth 5 cents. We can substitute this value into the equation for the total value of the coins to get:

4(2*5) + 11(5) = 95

Simplifying this equation, we get:

40 + 55 = 95

So our values for n and d are correct: Trip has 11 nickels and 4 dimes.

To justify this argument, we can use a proof by contradiction. Suppose that Trip had a different number of nickels or dimes. If Trip had more than 11 nickels, then the total value of the nickels alone would be greater than 55 cents, which is impossible since the total value of all the coins is only 95 cents. Similarly, if Trip had more than 4 dimes, then the total value of the dimes alone would be greater than 40 cents, which is also impossible. Therefore, Trip must have exactly 11 nickels and 4 dimes, and our argument is justified.

The solution of the evaluated expression, 1 / 3 x² for x = 6 is 12.

An expression is a combination of numbers, variables and operations such as addition, subtraction, multiplication, division etc.

To evaluate an expression means to find the value of the expression when the variable is replaced by a given number.

Therefore, let's evaluate the expression as follows:

1 / 3 x² for x = 6

Hence, let's substitute the value of x in the expression.

1 / 3 (6)² = 1 / 3 (36) = 12

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The man's daily wage is given as follows:

$42.

The wages are obtained applying the proportions in the context of the problem.

The woman receives $24 for 8 hours of work, hence her hourly wage is given as follows:

24/8 = $3 per hour.

(Hourly wage = Total wages/total hours).

Their wages per hour are in the ratio 7:5, hence the man's hourly wage is obtained multiplying the woman's hourly wage by 7/5, hence:

7/5 x 3 = 21/5 = $4.2 per hour.

The man works 10 hours a day, hence the daily wage is given as follows, multiplying the hourly wage by 10:

10 x 4.2 = $42.

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Cameron can use the boards as they are for his corner shelves.

To determine if the triangular boards can be used for Cameron's corner shelves, check if they satisfy the condition for the triangle inequality theorem, which states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Let's check each combination of sides:

18 inches + 18 inches = 36 inches > 24 inches (satisfied)

18 inches + 24 inches = 42 inches > 18 inches (satisfied)

18 inches + 24 inches = 42 inches > 18 inches (satisfied)

Therefore, all three combinations of sides satisfy the triangle inequality theorem, and the triangular boards can be used for Cameron's corner shelves.

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The recursive formula for an, the nth term of the sequence 4,2,1,1/2... is a(n) = a(n-1) / 2 where a(1) = 4.

A recursive formula is simply a way to define a sequence by explicitly defining one or more initial terms, and then providing a formula that allows us to calculate any term in the sequence using one or more previous terms.

In other words, to find the nth term of a sequence defined recursively, we need to know the (n-1)th term or the (n-2)th term, and so on.

Given the sequence in the questionis 4,2,1, 1/2,…

In the sequence 4, 2, 1, 1/2, we can observe that each term is half of the previous term.

So, to write a recursive formula for this sequence, we can say:

a(1) = 4 (the first term is 4)

a(n) = a(n-1) / 2

(each subsequent term is half of the previous term)

Therefore, the sequence is a(n) = a(n-1) / 2 where a(1) = 4

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Therefore, there are 278,256 different ways for 5 students to form a group from a class of 34 students.

Factorial, followed by an exclamation point, is the sum of all positive integers that are less than or equal to a specific positive integer in mathematics. Factorial seven is therefore represented by the symbol 7!, which is made up of the letters 1 2 3 4 5 and 7. By definition, factororial 0 is equal to 1.

The number of ways to form a group of 5 students out of a class of 34 students can be calculated using the combination formula:

C(34, 5) = 34! / (5! (34-5)!) = (34 × 33 × 32 × 31 × 30) / (5 × 4 × 3 × 2 × 1) = 278,256.

Therefore, there are 278,256 different ways for 5 students to form a group from a class of 34 students.

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intercept - means to cross through

answer = a - the graph crosses the x=axis

Answer:

The answer could be any number, with the variable x (not x^2, x^3, x^#). So it can be, for example, 6x, 8x, 109x, etc., as long as the variable is the same in each number.

As a consequence, in a triangle with angles 30-60-90 and legs 6 long and x short, x is equal to 2√3  and y is equal to 12.

Three-sided polygons, which are closed plane figures with straight edges, include triangles. One of the most fundamental and significant geometric and mathematical shapes, triangles have a wide range of useful characteristics and applications. Typically, a, b, and c are used to denote the triangle's three edges, and A, B, and C are used to denote the triangle's three angles. A triangle's inner angles are always added up to 180 degrees.

given

The percentage of the side lengths in a triangle with sides of 30-60-90 is:

Hypotenuse Means 1: Long leg: Short leg: 3: 2

In this quadrilateral, we have the following:

Hypotenuse = y; short limb = x; long leg = 6.

With the number mentioned above, we can write:

x : 6 : y = 1 : √3 : 2

For x and y, we can use cross-multiplication to get the following result:

x/1 = 6/√3

y/2 = 6/1

When we simplify these formulae, we obtain:

x = 6/√3 = 2√3

y = 12

As a consequence, in a triangle with angles 30-60-90 and legs 6 long and x short, x is equal to 2√3  and y is equal to 12.

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The probability of obtaining the value P(9) is fraction 1/4.

Equally probable occurrences are those that have the same theoretical probability (or likelihood) of taking place. For instance, after a very high number of flips, the relative frequency of Head and Tail is equal. In light of the fact that Head and Tail are both equally likely possibilities, flipping a coin is a fair and impartial way to choose between two choices.

Given that, the spinner spins the dial.

The probability of obtaining the value P(9) is:

P (9) = 1 / 4

Hence, the probability of obtaining the value P(9) is fraction 1/4.

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The complete question is:

Your number line can be broken apart by using a measuring thing like a scale.

What is a number line?

By aligning the numbers on a line, a number line allows you to visualize the size of the numbers. Typically horizontal in shape, a number line has zero in the center. The numbers are increasing and positive as you move to the right. The numbers rise and become more and more negative as you move to the left.

Why do we need a number line?

Number lines offer a method for mentally adding and subtracting. It's simple to imagine them as a type of support system for those in need, but this is untrue. These are crucial because they encourage effective mental arithmetic techniques, according to research.

So by using a scale you can measure the distance accurately and place the numbers in accurate positions.

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By answering the above question, we may state that As a result, $35.40 interest in simple interest is due for the use of the funds.

Divide the principal by the interest rate, the length of time, and other factors to arrive at simple interest. Simple return = principal + interest + hours is the marketing formula. This method makes it easiest to compute interest. The most typical technique to figure out interest is as a portion of the principle sum. He will only pay his share of the 100% interest, for example, if he borrows $100 from a buddy and promises to pay it back with 5% interest. $100 (0.05) = $5. When you borrow money, you must pay interest, and when you give it out, you must charge interest. Interest is often determined as an annual percentage of the loan total. The interest on the loan is this percentage.

For simple interest, use the formula:

I = P * r * t

where I represents the amount of interest payable, P the amount borrowed, r the interest rate, and t the length of time in years.

Inputting the values provided yields:

I = $590 * 0.03 * 2

I = $35.40

As a result, $35.40 in simple interest is due for the use of the funds.

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Answer:

[tex]( \frac{1}{2} + a) {}^{2} [/tex]

Step-by-step explanation:

There's your answer

Answer:

Step-by-step explanation:

We can use the formula:

average speed = (speed downstream + speed upstream) / 2

We are given the speed downstream is 8 miles per hour and the speed upstream is 2 miles per hour. Therefore,

average speed = (8 + 2) / 2 = 5 miles per hour

So the answer is (B) 5.0 miles per hour to the nearest tenth.

Answer:

Below

Step-by-step explanation:

Slope,m, is the 'x' coefficient =  -1   for this line   y = -x+4-2

the length of the rectangle is 9 units

the width of the rectangle is 2 units

the area of the rectangle is 18 square units

the area of the triangle is 9 square units

to find the length and width just count the number of units along the bottom and along the side. To find the area of the rectangle, do the length times the width. To find the area of the triangle divide the area of the rectangle by 2

Using the given ratio we will see that each kilogram costs 15 dollars.

We know that coffee at $12 per kg is mixed with coffee at $16 per kg in the ratio of 1: 3.

Then we have 4 kilograms, and the total cost of these 4 kg is:

1*$12 + 3*$16 = $60

Dividing that between the 4 kilograms:

$60/4 = $15

Each kilogram costs 15 dollars.

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The monthly payments are $248.53.

The total amount that he will pay $14911.8.

The amount of interest is $4911.8

What is the interest rate?

The amount of interest due each period expressed as a percentage of the amount lent, deposited, or borrowed is known as an interest rate. The total interest on a loaned or borrowed sum is determined by the principal amount, the interest rate, the frequency of compounding, and the period of time the loan, deposit, or borrowing took place.

The formula of monthly payment is

P = [tex]\frac{r (PV)}{1-(1-r)^{-n}}[/tex]

r is the rate of interest.

PV is the present value

n is the number of terms.

The bank offers you an installment loan with an interest rate of 17% over a 60-month term. The cost of the car is $10,000.

PV = $10,000

n = 60

r = 17%/12 = 0.17/12

The monthly installment is

P = [tex]\frac{ \frac{0.17}{12}\times 10000}{1-(1- \frac{0.17}{12})^{-60}}[/tex]

P = 248.53

The monthly installment is $248.53.

Total payment is (60 ×$248.53) = $14911.8

The interest is $(14911.8 - 10000) = $4911.8

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Answer:

Rosa must save at least $85 to purchase a new MP3 player.

The word "at least" indicates that the amount Rosa needs to save is not less than $85, but it could be more than $85.

Therefore, the inequality that represents the amount of money Rosa must save is:

C) m ≥ 85

This is because the amount Rosa saves, represented by "m", must be greater than or equal to $85 in order to afford the MP3 player.

To find the circle with center (3, -4) and radius 64, we again replace 64 with 64² in the equation, and get:

(x - 3)² + (y + 4)² = 4096

Several everyday items, such as turning ceiling fans, turning car wheels, spinning windmill blades, and turning gas turbine gears, exhibit circular motion. Another is an earth-orbiting satellite that was built by people.

The equation (x + 3)² + (y - 4)² = 64 represents a circle with center (-3, 4) and radius 8.

To find the circle with center (-3, 4) and radius 64, we replace 64 with 64² in the equation and get:

(x + 3)² + (y - 4)² = 4096

This circle has center (-3, 4) and radius 64.

To find the circle with center (3, -4) and radius 8, we replace (x + 3) with (x - 3) and (y - 4) with (y + 4) in the equation, and get:

(x - 3)² + (y + 4)² = 64

This circle has center (3, -4) and radius 8.

To find the circle with center (3, -4) and radius 64, we again replace 64 with 64² in the equation, and get:

(x - 3)² + (y + 4)² = 4096

This circle has center (3, -4) and radius 64.

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Answer:

Step-by-step explanation:

Here are the step-by-step instructions to find the number of ear cleanings that the groomer gave:

Start with the given number of nail trims, which is 15.

Divide the number of nail trims by 5 to find out how many groups of 5 nail trims there are. This gives us: 15 ÷ 5 = 3.

Multiply the number of groups of 5 nail trims by the corresponding ratio of ear cleanings per 5 nail trims, which is 3. This gives us: 3 × 3 = 9.

This means that for every 5 nail trims, the groomer gave 3 ear cleanings, and since the groomer gave 15 nail trims, they gave 9 ear cleanings in total.

So, the pet groomer gave 9 ear cleanings in total.

Answer:

We can start by setting up a ratio of the number of fruit skewers made to the number of liters of milkshake made:

fruit skewers : milkshake = 202020 : 444

Simplifying this ratio by dividing both sides by 444, we get:

fruit skewers : milkshake = 455 : 1

This means that for every 1 liter of milkshake made, Atilio makes 455 fruit skewers. Therefore, if Atilio makes 202020 liters of milkshake, they would make:

202020 x 455 = 91919100

So, Atilio would make 91919100 fruit skewers for the party.

Step-by-step explanation: