Please help I really need it!!

Answer:

Below

Step-by-step explanation:

a vertical line is just  X = ......

So for this one through the point  7,-7     just      x = 7

Answer: 15.40205

Step-by-step explanation:

The expression "cos 80° ÷ sin 10°" can be evaluated using the reciprocal identity of sine and cosine.

First, we convert 80° to its radian equivalent: 80° x (π/180°) = 4π/9 radians.

Next, we use the reciprocal identity of sine and cosine:

cos (θ) ÷ sin (θ) = cot (θ)

So,

cos 80° ÷ sin 10° = cot (10°).

The value of cot (10°) can be found using a calculator or a table of trigonometric values. The exact value is approximately 15.40205.

The formula for population variance uses the division of (sum of squared deviations) by the total number of elements in the population, while the formula for sample variance uses the division of (sum of squared deviations) by the sample size minus one.

The formula for population variance uses the division of (sum of squared deviations) by the total number of elements in the population, while the formula for sample variance uses the division of (sum of squared deviations) by the sample size minus one.

The formula for population variance is given by:

σ² = (1/N) * ∑(X - μ)²,

where N is the total number of elements in the population, X is an individual value in the population, and μ is the mean of the population.

s²= (1/(n-1)) * ∑(X - m)²,

where n is the sample size and m is the mean of the sample.

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The function will be positive and increasing for all values of x.

The formula for an exponential function is f (x) = aˣ, where x is a variable and a is a constant that serves as the function's base and must be bigger than 0. The transcendental number e, or roughly 2.71828, is the most often used exponential function basis.

Given the function,

y = 7(5)ˣ

when x = 0, y = 7

x = -1, y = 1.4

x = 1, y = 35

an exponential function is,

y = abˣ

when a > 0 and b > 0 the function is an exponential growth function, for all values of x.

Hence the function will be positive and increasing.

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The function y = 7(5)ˣ is positive and increasing,

Exponential function, in mathematics, a relation of the form y = [tex]a^x[/tex], with the independent variable x ranging over the entire real number line as the exponent of a positive number a.

Given:

y = 7(5)ˣ

As, Exponential functions have the general form:  y = aˣ, where a>0

and a is called the base of the exponential function and x is any real number.

If the base a> 1 and has positive exponent(i.e. x>0) then the exponential function is increasing.

If the base 0 < a< 1 and has negative power then the function is decreasing.

Thus, the function y = 7(5)ˣ is increasing.

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A possible vector function that represents the curve of intersection of the two surfaces is r(t) = (5 cos(t), 5 sin(t), 5 cos(t) sin(t))

The cylinder x^2 + y^2 = 25 represents the set of points in 3D space where the distance from the origin to the point (x, y, z) is equal to 5. The surface z = xy represents the set of points in 3D space where the height of the point (x, y, z) is equal to its x-y coordinate.

The curve of intersection of the two surfaces is given by the set of points in 3D space that are simultaneously on the cylinder and on the surface z = xy. This means that for any point on the curve of intersection, the distance from the origin to the point must be equal to 5, and the height of the point must be equal to its x-y coordinate.

We can find a vector function that represents the curve of intersection by parameterising the points on the curve in terms of a scalar parameter t. For example, a possible parameterization of the curve of intersection is:

r(t) = (5 cos(t), 5 sin(t), 5 cos(t) sin(t))

where t is a scalar parameter that ranges over all values between 0 and 2π. The values of x, y, and z are given by 5 cos(t), 5 sin(t), and 5 cos(t) sin(t), respectively, and represent a point on the curve of intersection for each value of t.

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The spherical coordinates of the given rectangular coordinates are (10, 0, 60).

The cartesian coordinate or rectangular coordinates describes the location of a point in space using an ordered triple where each coordinate represents a distance. The spherical coordinate system describes the location of a point in space using an ordered triple where coordinate describes one distance and two angles. In the spherical coordinate system, a point is represented by the ordered triple (ρ, θ, φ).

The equations which are used to convert from rectangular coordinates to spherical coordinates are:

ρ^2=x^2+y^2+z^2

tan⁡〖θ= y/x〗

φ=arccos⁡〖z/√(x^2+y^2+z^2 )〗

The given rectangular coordinates are (5√3, 0, 5). Hence,

ρ^2=〖(5√3)〗^2+0^2+5^2 ≈ 100

ρ ≈ √100 ≈ 10

tan⁡〖θ= 0/(5√3)=0〗

θ=  tan^(-1)⁡0=0

φ=arccos⁡〖5/√(〖(5√3)〗^2+0^2+5^2 )〗= arccos 5/10=arccos⁡0.5 ≈ 60

Note:  The question is incomplete. The complete question probably is: Convert from rectangular to spherical coordinates. (Use symbolic notation and fractions where needed. Give your answer as a point's coordinates in the form (*,*,*). (5√3, 0, 5)

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Answer:

8 ounces per cup or 8/1

Step-by-step explanation:

64 ounces/8 cups = 8

The Values for rectangle type wall and circle will be gallons of paint that are required to paint one side of a block wall =5.16 gallon, the gallons of sealer required to seal a floor=4.22 gallon and circumference of circle≈39 feet.

What exactly is a rectangle?

Rectangles are four-sided polygons with all internal angles equal to 90 degrees. At each corner or vertex, two sides meet at right angles. The rectangle differs from a square in that its opposite sides are equal in length.

For example, if one side of a rectangle is 20 cm long, the opposing side is similarly 20 cm long.

A rectangle has two diagonals that intersect. Both diagonals are the same length

P = 2 (Length + Width) is the perimeter.

Rectangle Area=Length*Breadth

Now,

1. Given Length of wall=172 feet and breadth =6 feet then area=172*6=1032

square feet and The paint being used will cover 200 square ft per gallon.

so, gallons of paint that are required to paint one side of a block wall

=1032/200=5.16 gallon

2. Length=250 feet, breadth=120 feet then perimeter=2*370=740 feet

paint used to seal 175 feet floor=1 gallon

then the gallons of sealer required to seal a floor 120' x250'=740/175=4.22 gallon

3. Incomplete question.

4.diameter=12feet 5inch=149 inch

circumference of circle=π*diameter=3.14*149≈39 feet

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the test-taker made a score of 16 points on the test.

16 points

8 questions x 2 points per question = 16 points

The test consisted of 17 questions, each worth two points. By answering 8 of them correctly, the test-taker was able to earn 16 points. This score was acquired by multiplying the number of correct questions by the two points per question. Therefore, the test-taker made a score of 16 points on the test.

The test consisted of 17 multiple-choice questions, each worth two points. Each question contained four possible answers, one of which was the correct answer. By selecting the correct answer to 8 questions, the test-taker earned a total of 16 points. This score was calculated by multiplying the number of correct questions by the two points per question. Therefore, the test-taker achieved a score of 16 points on the test.

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A statistic is an estimate or calculation based on a sample size of data, while a parameter is a numerical characteristic of an entire population.

A statistic is a value or set of values which are calculated from a sample of data. Statistic values are used to measure attributes of a population, such as the mean, median, or mode of a population. Statistic values are estimates and can be subject to sampling error. Parameters, on the other hand, are numerical characteristics of an entire population. Parameters are fixed values which describe the population as a whole. For example, thirty percent of all dog owners might be a statistic, as it is an estimate based on a sample of data. However, the total number of dog owners would be a parameter, as it describes the entire population of dog owners. Parameters are not subject to sampling error, and they cannot be calculated from a sample set of data.

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Answer:154 LCM I hope this helps mark me brainlist

Step-by-step explanation:

The Least Common Multiple (LCM) of 22 and 77 is 154.

To get the Least Common Multiple (LCM) of 22 and 77 we need to factor each value first and then we choose all the factors which appear in any column and multiply them: 

22: 2 11

77: 7 11

______
LCM 2711

The Least Common Multiple (LCM) is: 
2 times 7 times 7=154

Answer:

Factor 3x+3

3x+3

=3(x+1)

Answer:

P=2[9x-3]

Step-by-step explanation:

perimeter of rectangle =2(L+W)=2L+2W

where P=perimeter of rectangle

L=length of rectangle =3x+3

W=width of rectangle =6x-6

P=2[(3x+3)+(6x-6)]

P=2[3x+3+6x-6]

P=2[9x-3]

The balance after 9 months with an APR of 9% and monthly payments of 250 is, $267.38

A quick and easy method of calculating the interest charge on a loan is called a Simple interest.

Given that;

The savings plan balance after 9 months with an APR of 9% and monthly payments of 250.

Now, Let the balance after 9 months with an APR of 9% and monthly payments of 250 is, x

Hence, We can formulate;

⇒ x = 250 (1 + 0.09/12)⁹

⇒ x = 250 × 1.0075⁹

⇒ x = 250 × 1.0695

⇒ x = $267.375

⇒ x = $267.38

Thus, The balance after 9 months with an APR of 9% and monthly payments of 250 is, $267.38

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The value of a in the triangle is 17 degrees

An equilateral triangle is that type of triangle whose all sides and all angles are equal.  Recall theat the sum of angles of a triangle is 10 degrees.

This implies that

4a-8 +4a-8 +4a-8 = 180

12a -24 = 180

12a = 180+24

12a = 204

Making a the subject of the relation,

12a/12 = 204/12

Therefore the value of a= 17⁰

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the value of a will be 17 for the given set of data.

The properties of the triangle are: The sum of all the angles of a triangle (of all types) is equal to 180°. The sum of the length of the two sides of a triangle is greater than the length of the third side. In the same way, the difference between the two sides of a triangle is less than the length of the third side.

Given, KLH is an equilateral triangle.

Since we all know that all angles of an equilateral triangle are equal.

Also From the property of  the triangles:

Sum of all angles = 180°

∠K + ∠L + ∠H = 180°

3 * (4a -8) = 180

4a -8 = 60

4a = 68

a = 17

Therefore, the value of a will be 17 for the given set of data.

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The median of this data set is 30. If the largest observation (50) were deleted, the median would become 25, which is a 5 unit change.

Here's a data set with five observations for which the median would change significantly if the largest observation were deleted:

Observation 1: 20

Observation 2: 25

Observation 3: 30

Observation 4: 35

Observation 5: 50

The median of this data set is 30. If the largest observation (50) were deleted, the median would become 25, which is a 5 unit change. This is a significant change because the median is a measure of central tendency that shows the midpoint of a set of data and is sensitive to outliers. By removing the largest observation, the data set is no longer skewed towards larger values, and the median changes to reflect this.

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The value of x in the given equation -3x+2=4x+2 is x=0.

Two or more expressions with an Equal sign is called as Equation.

The given equation is -3x+2=4x+2

Minus three times of x plus two equal to four times of x plus two.

-3x+2=4x+2

Add 3x on both the sides

2=4x+3x+2

x=0

Hence, the value of x in the given equation -3x+2=4x+2 is x=0.

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The measure of the smallest angle of the triangle would be = 33°

The total angle measurement of a triangle is a total of 180°.

That is ;

180° = 90 + (4x-7)° + (3x-15)°

180 = 90-7-15+4x+3x

180 = 90-22+7x

180 = 68+7x

180-68 = 7x

7x = 112

X= 112/7

X= 16

substitute X=16 into both angles (4x-7)° and (3x-15)° to know the smallest.

= 4(16)-7

= 64-7

= 57°

and;

= 3(16)-15

= 48-15

= 33°

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The simplification of the fractions gives 4 / (b - d).

Fractions are numbers which are of the form a/b where a and b are real numbers. This implies that a parts of a number b.

Here, a is called the numerator and b is called the denominator.

Given expression is [tex]\frac{8a + 4b}{2ab+b^2-2ad-bd}[/tex].

We have to simplify each of the numerator and denominator in the expression [tex]\frac{8a + 4b}{2ab+b^2-2ad-bd}[/tex].

Take the common factor in each of the expressions in numerator and denominator.

8a + 4b = 4(2a + b)

2ab + b² - 2ad - bd = 2ab - 2ad + b² - bd

                               = 2a(b - d) + b(b - d)

                               = (b - d) (2a + b)

[tex]\frac{8a + 4b}{2ab+b^2-2ad-bd}[/tex] = [tex]\frac{4(2a+b)}{(b-d)(2a+b)}[/tex]

                     = [tex]\frac{4}{b-d}[/tex]

Hence the simplified expression is 4 / (b - d).

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The equation [tex]\frac{x}{x+8} = -\frac{1}{6}[/tex] is not defined at x = - 8.

Suppose we have an ordered pair (x, y) then the domain of the function is the set of values of x and the range is the set of values of y for which x  is defined.

Given, An equation [tex]\frac{x}{x+8} = -\frac{1}{6}[/tex].

We know the denominator of a rational expression can not be equal to zero.

Therefore, x + 8 ≠ 0 ⇒ x ≠ - 8.

So, The restriction of the expression is at - 8 and it is undefined at - 8.

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The p-value of the test is 0.112

To determine whether the consumer group's belief is supported by the sample data, we can perform a one-sample t-test.

The null hypothesis is that the true average score improvement is equal to 50 points, while the alternative hypothesis is that it is less than 50 points.

Using the sample data, we can calculate the t-statistic as:

t = (sample mean - hypothesized mean) / (sample standard deviation / sqrt(sample size))

t = (44 - 50) / (27 / √(31))

t = -1.24

The degrees of freedom for this test is 30 (sample size minus one).

Using a t-distribution table or calculator, we can find the p-value associated with this t-statistic and degrees of freedom, which is the probability of observing a t-statistic as extreme as -1.24 or more extreme, assuming that the null hypothesis is true.

The p-value is approximately 0.112.

Since the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that there is evidence that the true average score improvement is less than 50 points.

Therefore, the consumer group's belief is supported by the sample data.

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The probability that a randomly selected Atlantic cod has a length of 53.68 cm or less is given by the equation P ( x > 38.68 ) = 0.99865

The relationship between a value and the mean of a set of values is expressed numerically by a Z-score. The Z-score is computed using the standard deviations from the mean. A Z-score of zero indicates that the data point's score and the mean score are identical.

The Z-score is calculated using the formula:

z = (x - μ)/σ

where z: standard score

x: observed value

μ: mean of the sample

σ: standard deviation of the sample

Given data ,

Let the probability that a randomly selected Atlantic cod has a length of 53.68 cm or less be represented as P

Now , the equation will be

The observed value of x = 38.68 cm

The mean of the sample μ = 49.9 cm

The standard deviation of the sample σ = 3.74 cm

Now , z-score is calculated using the formula:

z = (x - μ)/σ

Substituting the values in the equation , we get

z = ( 38.68 - 49.9 ) / 3.74

z = -3

Now ,the p value from the z table is

P ( x > 38.68 ) = 1 - P ( x < 38.68 )

P ( x < 38.68 ) = 0.0013499

P ( x > 38.68 ) = 0.99865

And , the probability is P ( x > 38.68 ) = 0.99865 = 99.865 %

Hence , the probability is 84.392 %

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Answer:

a. Congruent

Step-by-step explanation:

ABCD has the same dimensions of A'B'C'D', so that means that it is congruent, even though it's in a different place on the graph.

Answer:

A: 4

Step-by-step explanation:

15 divided by 20 = 0.75

4 + 2 = 6

14 - 6 = 8

So, the smaller triangle base will be 6 and the bigger triangle base will be 8

6 divided by 8 = 0.75

So, A:4 is the correct answer.

The probability of getting at least 1 red is 6/7

Probability is the likelihood of a desired event happening.

Theoretical probability is the theory behind probability. To find the probability of an event, an experiment is not required. Instead, we should know about the situation to find the probability of an event occurring.

The probability that the first is blue and the second is blue

p(First blue, Second blue) = 3/7 × 2/6 = 1/7

Thus, the probability of getting at least 1 red, is the complement of getting both blue

That is, P(At least 1 red) = P'(both blue) = 1 - P(Both blue) = 1 - 1/7 = 6/7

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[tex]17\frac{1}{2}[/tex] cups of flour we need to make three of each cake.

A fraction represents a part of a whole.

Given that the first recipe calls for 2 1/2 cups of flour and the second one calls for 3 1/3 cups of flour.

We need to make three of each cakes.

[tex]2\frac{1}{2}[/tex] cups x 3 = [tex]7\frac{1}{2}[/tex] cups of flour for the first recipe.

And for the second recipe [tex]3\frac{1}{3}[/tex] cups x 3 = 10 cups of flour.

So in total  [tex]7\frac{1}{2}[/tex]  cups + 10 cups = [tex]17\frac{1}{2}[/tex] cups of flour.

Hence,  [tex]17\frac{1}{2}[/tex] cups of flour we need to make three of each cake.

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Answer:

12

Step-by-step explanation:

there are 7 days in a week so just simply divide 84 by 7 :)

Answer:

two plus two equals five

Step-by-step explanation:

Answer:

The rate at which the turtle is crawling can be found by dividing the distance traveled in miles by the time in hours.

So, the turtle can travel 3/20 of a mile in 5/6 of an hour, which means that the turtle is crawling at a rate of (3/20) / (5/6) miles per hour.

To simplify, we need to convert both the numerator and denominator to a common unit. If we multiply the numerator and denominator by 6, we get:

(3/20) * 6 / (5/6) * 6 = 3 / 5 miles per hour.

Therefore, the turtle is crawling at a rate of 3/5 miles per hour.

Answer: Yes, it is congruent.

Rt is same length as Tu

angle rst is equal to angle tvu

therefore the angle where they both meet would have to be the same aswell, so it is congruent

Step-by-step explanation:

Answe is attached in the above image.