Look at the picture for the question

Answer:

We can use the cosine double angle formula to find cos(2π/3):

cos(2θ) = cos^2(θ) - sin^2(θ)

Letting θ = π/3, we get:

cos(2π/3) = cos^2(π/3) - sin^2(π/3)

Using the values of cosine and sine of π/3 (which are known), we have:

cos(2π/3) = (1/2)^2 - (√3/2)^2

Simplifying, we get:

cos(2π/3) = 1/4 - 3/4

cos(2π/3) = -1/2

Therefore, cos(2π/3) is equal to -1/2.

Answer:

cos(2π/3) = cos(π/3 + π/3)

= cos²(π/3) - sin²(π/3)

= (1/2)² - (√3/2)²

= 1/4 - 3/4

= -2/4

= -1/2

Step-by-step explanation:

here are the steps:

Therefore, cos(2π/3) = -1/2

The value of x is 21.75.

We need to convert from mixed number to decimal number. To do this you can follow the steps shown below:

We must divide the numerator of the fraction by the denominator of the fraction.

Now we must add the quotient obtained to the Whole number part.

So, we get:

7 1/4 = 7.25

Then, the scale image that maps "Figure a" onto "Figure b" is: 1 : 7.25.

Finally, in order to find the value of "x", you need to multiply the given length of the corresponding side of "Figure a" by 7.25,

Therefore, you get that the result is:

x = 3(7.25)

x = 21.75

Hence the value of x is 21.75.

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The complete question is ;

Figure a is a scale image of figure b the scale that maps figure a onto figure b is 1:7 1/4 enter the value of x

Both figures are triangles

Figure a is smaller than figure b

Figure a to the right has a 3

Figure b to the right has a x

The surface area of the solid created upon dilation is equal to 36 units².

In Mathematics and Geometry, the surface area (SA) of a cylinder can be calculated by using this mathematical equation (formula):

SA = 2πrh + 2πr²

Where:

By substituting the given parameters into the formula for the surface area (SA) of a cylinder, we have the following;

Surface area = 2πrh + 2πr²

Surface area = 2(π)(9)(9) + 2(π)(9²)

Surface area = 324π units²

After applying a dilation with a scale factor of 1/3, the surface area of the cylinder is given by;

Surface area = 324π × (1/3)²

Surface area = 324π × 1/9

Surface area = 36 units²

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Answer: E is correct

Step-by-step explanation:

Remember that the coordinates (2,7π4) tell us the radius r=2 and the angle θ=7π4. So the point should be on the circle labeled 2 and form an angle of 7π4 with the positive x-axis. Point E is the correct point.

The one to one functions in the options includes

A one-to-one function, also known as an injective function, is a type of function in mathematics where every element in the domain maps to a unique element in the range.

So we can say that, each input value corresponds to exactly one output value, and no two distinct input values have the same output value.

Graphically, one-to-one functions pass the horizontal line test, meaning that no horizontal line intersects the graph of the function more than once.

Applying the horizontal line test shows that the one-to-one function are: Graph 1, 4 and 6

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Step-by-step explanation:

lets call the line (d)

amd the given eq of the line is (d')

so (d) is perpendicular to (d')

slope(d)×slope(d')=-1

-2(1/2)=-1

so (d): y=1/2x + b

point A (4, -3) belongs to (d) so,

Ya=1/2Xa+b

-3=1/2(4)+b

b=-5

(d):y=1/2x-5

The above prompts are related to the concepts of Degrees, Radians, Sines and Cosines. See the solutions below.

1)

(a) Cos 150 degrees

To convert 150 degrees to radians, we multiply by π/180:

150 degrees = (150π/180) radians = (5π/6) radians

We can use the unit circle and reference angle of π/6 to find the cosine of 5π/6:

cos(5π/6) = -cos(π/6) = -(√3/2) = -√3/2

Therefore, cos 150 degrees = -√3/2.

(b) Sin 240 degrees

To convert 240 degrees to radians, we multiply by π/180:

240 degrees = (240π/180) radians = (4π/3) radians

We can use the unit circle and reference angle of π/3 to find the sine of 4π/3:

sin(4π/3) = -sin(π/3) = -(√3/2) = -√3/2

Therefore, sin 240 degrees = -√3/2.

2)

To use the law of cosines, we need either a side and the two angles opposite that side, or two sides and the angle between them. In this case, we have two angles and the side opposite one of them, so we can use the law of sines to find the other side and then use the law of cosines to find the remaining side or angle.

Using the law of sines, we have:

sin A / AB = sin B / AC

where AC is the side opposite angle B. Substituting the given values, we get:

sin 52 / 26.7 = sin 70 / AC

Solving for AC, we get:

AC = sin 70 / sin 52 * 26.7 = 30.4

Now we can use the law of cosines to find the remaining side, x:

x^2 = AB^2 + AC^2 - 2ABACcos A

Substituting the given values, we get:

x^2 = 26.7^2 + 30.4^2 - 226.730.4*cos 52

Solving for x, we get:

x ≈ 22.1

Therefore, the missing side is approximately 22.1.

To find the area of the triangle, we can use the formula:

Area = (1/2) * a * b * sin C

where a and b are the lengths of the two sides, and C is the included angle. Substituting the given values, we get:

Area = (1/2) * 7 * 9 * sin 30

Using the fact that sin 30 = 1/2, we can simplify this to:

Area = (1/2) * 7 * 9 * (1/2) = 15.75

Therefore, the area of the triangle is 15.75 square units.

From the law of sines, we have:

sin A / a = sin B / b

Substituting the given values, we get:

sin 45° / (7√2) = sin B / 7

Solving for sin B, we get:

sin B = (7/7√2) * sin 45° = √2/2

Therefore, B = 45° or 135°. We can use the fact that the angles of a triangle sum to 180° to find C:

C = 180° - A - B = 90° or 0°

If C = 0°, then the triangle is degenerate and the sides a and b lie on top of each other. Therefore, we must have C = 90°.

Now we can use the Pythagorean theorem to find the remaining side:

c^2 = a^2 + b^2 - 2ab*cos C

Substituting the given values, we get:

c^2 = (7√2)^2 + 7^2 - 2(7√2)(7)*cos 90°

Solving for c, we get:

c = √(98 + 49) = √147 = 7√3

Therefore, the sides of the triangle are:

a = 7√2

b = 7

c = 7√3

Using the law of cosines to find x:

In triangle ABC with side lengths AB = 18, AC = 15, and angle A = 108 degrees, we want to find the length of side BC (denoted by x). Using the law of cosines:

x^2 = 18^2 + 15^2 - 2(18)(15)cos(108 degrees)

We can evaluate the cosine of 108 degrees using the identity cos(180 - 108) = -cos(108):

cos(108 degrees) = -cos(180 - 108 degrees) = -cos(72 degrees)

Substituting this into the equation above, we get:

x^2 = 18^2 + 15^2 - 2(18)(15)(-cos(72 degrees))

Simplifying:

x^2 = 729

Taking the square root of both sides:

x = ±27

Since x represents a length, we take the positive root:

x = 27

Therefore, the length of BC is 27 units.

Using the law of cosines to find theta:

In triangle ABC with side lengths AB = 20, BC = 12, and AC = 10, we want to find the measure of angle B (denoted by theta). Using the law of cosines:

cos(B) = (12^2 + 10^2 - 20^2) / (2(12)(10)) = -1/2

Since -1/2 is the cosine of an angle in the second quadrant, we have:

B = 180 degrees - arccos(-1/2)

Using a calculator, we find:

B ≈ 150.5 degrees

Therefore, the measure of angle B is approximately 150.5 degrees (or theta = 150.5 degrees).

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Answer:

the first one

Step-by-step explanation:

you move N to the left of the equation,

and then K to the right of the equation.

voila.

f(275) represents the average number of days houses stay on the market before being sold for $275,000.

From the question, we have the following parameters that can be used in our computation:

f(p) is the average number of days a house stays on the market before being sold for price p in $1,000s

This means that

In f(275), we have

p = 275

So, the meaning is:

f(275) is the average number of days a house stays on the market before being sold for price $275,000s

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The supplied value 4 is a solution to the equation m + 2(m + 1) = 14.

To solve the equation m + 2(m + 1) = 14 for the supplied value of m = 4, we substitute the value of m into the equation and simplify both sides of the equation.

First, we replace every occurrence of m in the equation with 4:

m + 2(m + 1) = 14

Substitute m with 4

4 + 2(4 + 1) = 14

The parentheses around (4 + 1) indicate that we need to add 4 and 1 together first, before multiplying by 2. This gives us:

4 + 2(5) = 14

We simplify further by performing the multiplication:

4 + 10 = 14

14 = 14

Therefore, when we substitute m = 4 into the equation, we get a true statement. Therefore, 4 is a solution to the equation.

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The solution of the system of equations given y = -6x + 5 and 4x - y = 5,  is (1, -1).

To solve this system of equations, we can use the substitution method. We can rearrange the first equation to solve for y in terms of x:

y = -6x + 5

Next, we can substitute this expression for y in the second equation:

4x - (-6x + 5) = 5

Simplifying this equation, we get:

4x + 6x - 5 = 5

Combining like terms, we get:

10x = 10

Dividing both sides by 10, we get:

x = 1

Now that we have the value of x, we can substitute it back into one of the original equations to solve for y. Using the first equation, we get:

y = -6(1) + 5 = -1

Therefore, the solution of the system of equations is (1, -1). This means that the two equations intersect at the point (1, -1) on the coordinate plane, and this is the only point that satisfies both equations simultaneously.

In summary, to solve the system of equations y = -6x + 5 and 4x - y = 5, we used the substitution method to find that the solution is (1, -1).

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The fundamental core of mathematical activity is problem-solving.

Mathematical problems can be found in many different fields, and the process of solving these problems involves analyzing the problem, identifying relevant information, formulating a strategy or plan, executing the plan, and checking the solution to ensure it is correct and complete.

This process of problem-solving is central to all areas of mathematics, and is a key skill that can be applied to many different contexts both inside and outside of mathematics.

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The measures of the angles are

MSR = 42

MSCQ = 138 degree

mSQR = 318 degrees

mQV = 42 dgerres

MSCQ + MSCR = 180

MSR = MSCR = 42

MSCQ + 42 = 180

MSCQ = 138 degree

MSQR = 360 - 42

= 318 degrees

MQV = MSR vertically opposite

= 42 degree

MQSR = 1/2 x 42

= 21 degrees

MQV = 1/2 x 180 = 90 degrees

The measures of the angles have been solved for

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It is true. The trigonometric identity  [tex]\frac{cscx+secx}{sinx + cosx}[/tex] = cotx + tanx

To verify that (cscx+secx)/(sinx + cosx) = cotx + tanx

csc = [tex]\frac{1}{sin}[/tex]  and Sec = [tex]\frac{1}{cos}[/tex]

If we insert the values, it would be

[tex]\frac{ 1/sinx + 1/cosx}{sinx + cosx}[/tex]

= [tex]\frac{cosx + sinx}{sinx * cosx}[/tex] ÷  ([tex]\frac{1}{sinx + cosx}[/tex])

= [tex]\frac{1}{sinx * cosx}[/tex]

[tex]\frac{Sin^2 x + Cos^2x}{Sin x Cos x}[/tex]  =  [tex]\frac{Sin^2x}{SinxCosx}[/tex]  +  [tex]\frac{Cos^2x}{SinxCosx}[/tex]

= cotx + Tanx

Mind you

cotx = [tex]\frac{1}{tanx}[/tex] = [tex]\frac{cosx}{sinx}[/tex]

tanx = [tex]\frac{sinx}{cosx}[/tex]

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The values of the a gles using trigonometric ratios are;

tan L = (1/√3)

sin L = 0.5

cos L = ½√3

sin M = 2/√3

cos M = 0.5

The three most basic trigonometric ratios are;

sin x = opposite/hypotenuse

cos x = adjacent/hypotenuse

tan x = opposite/adjacent

We are given;

l = 12

m = 12√3

n = 24

Using trigonometric ratios, we have;

12/(12√3) = tan L

tan L = (1/√3)

L = tan¯¹(1/√3)

L = 30°

Similarly;

12/24 = sin L

sin L = 0.5

cos L = (12√3)/24

cos L = ½√3

Similarly;

sin M = 24/12√3

sin M = 2/√3

cos M = 12/24

cos M = 0.5

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Answer:

a) 3/4

b) 21/4  

Step-by-step explanation:

To find the scale factor from A to B take any side of B and divide it by the corresponding side of A

The ratio will be the same for all sides

We have
scale factor = 3/4

We see that the sides 9 and 12 are also in this ratio: 9/12 = 3/4

a) So scale factor from A to B is 3/4

b) w of shape B corresponds to the side with length 7 in shape A

The ratio of w to 7 must be equal to the scale factor

So w/7 = 3/4

w = 7 x 3/4

w = 21/4

24  boxes were used this week

12 boxes of recycled paper were used last week
For this week double of this amount was used

When calculating double the amount that was used, this means we have to multiply the initial amount by 2

In this case, we have to multiply 12 by 2

= 12 × 2

= 24

Hence 24 boxes of recycled paper was used this week

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The number 2 is the one for which the theoretical probability matches the experimental probability.

To determine which number has a theoretical probability that matches the experimental probability, we need to calculate both the theoretical and experimental probabilities for each of the four numbers.

The theoretical probability of spinning any one of the four numbers is 1/4, or 0.25. This is because there are four equally likely outcomes, and each outcome has a probability of 1/4.

To calculate the experimental probability, we need to count the number of times each number was spun and divide by the total number of spins. Here are the results:

- Number 1 was spun 9 times out of 28 spins, so its experimental probability is 9/28, or approximately 0.321.

- Number 2 was spun 7 times out of 28 spins, so its experimental probability is 7/28, or approximately 0.250.

- Number 3 was spun 6 times out of 28 spins, so its experimental probability is 6/28, or approximately 0.214.

- Number 4 was spun 6 times out of 28 spins, so its experimental probability is 6/28, or approximately 0.214.

To find the number that has a theoretical probability that matches the experimental probability, we can compare the theoretical probability to each of the experimental probabilities. The number that has an experimental probability that is closest to the theoretical probability of 0.25 is number 2, which has an experimental probability of approximately 0.250.

Therefore, the number 2 is the one for which the theoretical probability matches the experimental probability.

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The true statements are (a) A sphere with half the radius has 1/8 of the volume and (c) A sphere with 3 times the radius has 27 times the volume

Given that the radius of the sphere is represented as

Radius, r = 4 inches

The formula of the volume of the sphere is represented as

V = 4/3πr³

For the transformed volume, we have

V₂ = 4/3πR³

Where

R = kr and k is the scale factor

So, we have

V₂ = 4/3π(kr)³

V₂ = 4/3πr³k³

This gives

V₂ = Vk³

Testing the statements, we have

(a) A sphere with half the radius has 1/8 of the volume

V₂ = V(1/2)³

Evaluate

V₂ = 1/8V

So, the statement is true

(b) A sphere with twice the radius has 6 times the volume

V₂ = V(2)³

Evaluate

V₂ = 8V

So, the statement is false

(c) A sphere with 3 times the radius has 27 times the volume

V₂ = V(3)³

Evaluate

V₂ = 27V

So, the statement is true

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Complete question

A sphere has a radius of 4 inches.

Choose True or False for each statement.

(a) A sphere with half the radius has 1/8 of the volume

(b) A sphere with twice the radius has 6 times the volume

(c) A sphere with 3 times the radius has 27 times the volume

The length of the guy wire should be option D √(25) ft. that is 25 ft.

Perpendicular means that two lines or objects intersect each other at a 90-degree angle, forming a right angle. This means that if you were to draw a line at the point of intersection, it would split the angles on either side of it into two equal parts. In simpler terms, if you imagine a horizontal line and a vertical line intersecting each other, they would be perpendicular to each other. The concept of perpendicularity is important in geometry and is used in many different applications, such as construction, engineering, and design.

We can use the Pythagorean theorem to find the length of the guy wire c. According to the theorem, in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides. Therefore:

c² = a² + b²

Substituting the given values:

c² = (20 ft)² + (15 ft)²

c² = 400 ft² + 225 ft²

c² = 625 ft²

Taking the square root of both sides:

c = √(625) ft

c = 25 ft

Therefore, the length of the guy wire should be 25 feet.

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The cash payback period for the project is 4.7 years.

The cash payback period is a financial metric that calculates the amount of time it takes for a project to generate enough cash flows to recover the initial investment (cost). It is calculated by dividing the initial investment by the estimated annual net cash flows.

Decimal refers to a system of numbers based on the number 10, where each digit represents a different power of 10. It is a way of expressing numbers using a decimal point to separate the whole number from the fractional part.

Given:

Estimated annual net cash flows = $55,800

Initial investment (cost) = $262,260

Cash Payback Period = Initial Investment / Estimated Annual Net Cash Flows

Putting the values:

Cash Payback Period = $262,260 / $55,800

Calculating the cash payback period:

Cash Payback Period = 4.7 years (rounded to one decimal place)

Therefore, the cash payback period for the project is 4.7 years.

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Answer:

The lateral area of a cone is given by the formula:

L = πrs

Where r is the radius of the base, s is the slant height, and π is pi.

We are given that the lateral area L is 587π cm^2 and the radius r is 32 cm. Substituting these values into the formula, we get:

587π = π(32)s

Simplifying, we can cancel the π on both sides of the equation:

587 = 32s

Dividing both sides by 32, we get:

s = 18.34375

Rounding to the nearest tenth, we get:

s ≈ 18.3 cm

Therefore, the slant height is approximately 18.3 cm.

Step-by-step explanation:

Answer: bellshaped

Step-by-step explanation:

Answer:

The party opposed to expanding slavery in the United States was the Republican Party. It was actually formed to go against slavery.