Exit Topic 8: MathXL for School: Topic Review
Triangle KLM has KL=30, KM = 25, and LM = 22. What is the area of the triangle?
The area of AKLM is about

Answer:15

Step-by-step explanation:

The length of the rise x is 25.5

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

Length = 17

Angle = 27 degrees

The rise, x is then calculated using the following laws of tangent

tan(27) = 13/x

Make x the subject

So, we have the following representation

x = 13/tan(27)

Evaluate the expression

This gives

x = 25.5

Hence, the value of x is 25.5

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Answer:

A. 10

Step-by-step explanation:

2/4 = x/20

1/2 = x/20

2x = 20

x = 10

Answer: 10

Answer:

What are the multiples of 57? The first 10 multiples of 57 are 57, 114, 171, 228, 285, 342, 399, 456, 513 and 570

Step-by-step explanation:

have great day

Answer: No, the area will not stay the same.

The new area is smaller than the old area.

========================================================

Explanation:

Let's look at an example.

Consider a 10 by 30 rectangle. Its area is 10*30 = 300 square units.

Now let's change the length and width.

The rectangle is now 12 by 24. The new area is 12*24 = 288 square units.

In summary:

This is one counterexample, of infinitely many, that proves the area does not stay the same. Instead, the area shrinks.

-----------------

This section will go over a more formal proof using algebra.

old area = length*width = LW

Let's say the length increases by 20% and the width decreases by 20%.

Then,

new area = (new length)*(new width)

new area = (1.20L)*(0.80W)

new area = (1.20*0.80)*(LW)

new area = 0.96*(LW)

new area = 0.96*(old area)

This shows that the new area is 96% of the old area. There has been a 4% reduction (since 100% - 96% = 4%)

Notice how 96% of 300 = 0.96*300 = 288. See the previous section above.

We would expect to see around 200 fewer accidents per year among 16-year-old drivers in your state if the proposal to increase the permit period from 6 to 12 months is implemented.

Estimation is the process of determining an estimate or approximation, which is a value that can be used for a specific purpose even when the input data is incomplete, uncertain, or unstable.

It is difficult to predict exactly how many fewer accidents would occur as a result of increasing the time a driver must hold a learner's permit from 6 to 12 months. However, there is evidence to suggest that longer permit periods can result in fewer accidents, as novice drivers have more time to gain experience under supervision before obtaining a full license.

According to research by the Insurance Institute for Highway Safety, increasing the permit period from 6 to 12 months could lead to a 20% reduction in crash rates among 16-year-old drivers.

Assuming this reduction holds true in your state, we can estimate the number of accidents that would be prevented by multiplying the current number of accidents involving 16-year-old drivers (let's assume 1,000 per year) by 20%, or 0.2. This gives us an estimated reduction of 200 accidents per year.

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Answer:

There are 6 zeros in one million.

Step-by-step explanation:

1000000 (one million)

6 zeros

The conversion from pounds (lb) to kilograms (kg) is determined by multiplying the weight in pounds by 0.45359237. The formula to convert pounds to kilograms is kg = lb x 0.45359237.

To calculate the weight of 205 pounds in kilograms, the calculation is as follows: kg = 205 lb x 0.45359237 = 92.98 kg.Therefore, the weight of 205 pounds is equal to 92.98 kilograms. This calculation can also be used to convert any weight in pounds to its equivalent in kilograms. For example, to convert 500 pounds to kilograms, the calculation would be: kg = 500 lb x 0.45359237 = 226.79 kg.This calculation can be used to convert any weight in pounds to its equivalent in kilograms. It is important to remember that the formula must be used correctly and that all units must be consistent. It is also essential to ensure that the result is rounded to the correct number of decimal places for accuracy.

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A convergence radius calculator is a tool used in calculus to calculate the radius of convergence for a power series using the ratio test.

To calculate the convergence radius of a power series, one can use a formula known as the "ratio test". The ratio test involves taking the limit of the absolute value of the ratio of successive terms in the series, as n approaches infinity. If this limit exists and is less than 1, then the series converges absolutely. The convergence radius can then be found as the reciprocal of this limit.

For example, given the power series:

∑(n=0 to infinity) [tex](x-2)^n / n^2[/tex]

we can use the ratio test to find the convergence radius as follows:

[tex]|(x-2)^(n+1) / (n+1)^2| / |(x-2)^n / n^2|[/tex]

= [tex]|(x-2) / (n+1)|^2 * (n^2 / (x-2)^2)[/tex]

= [tex](n^2 / (n+1)^2) * (1 / (x-2)^2)[/tex]

= [tex]n^2 / ((n+1)^2 * (x-2)^2)[/tex]

Taking the limit of this expression as n approaches infinity, we get:

[tex]lim(n- > ∞) (n^2 / ((n+1)^2 * (x-2)^2))[/tex]

= [tex]1 / (x-2)^2[/tex]

Since this limit exists and is less than 1 for all x except x=2, the power series converges absolutely for all values of x within a radius of [tex]1/(x-2)^2[/tex] centered at x=2. Therefore, the convergence radius of the power series is 1.

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The solution is,  total interest will you pay is  $13750.

Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

here, we have,

given that,

A loan of $25,000 has an annual simple interest rate of 5.5%.

The total cost of the loan is $38,750.

so, total interest will you pay = $(38750 - 25000)

                                                 = $13750

Hence, The solution is,  total interest will you pay is  $13750.

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The math topics covered in the grade 6 math worksheets are algebra,geometry,measurement, number operation.

1. Number sense and operations: This includes understanding numbers, fractions, decimals, and integers, as well as performing operations with them.

2. Algebra: This includes understanding algebraic expressions and equations, and using them to solve problems.

3. Geometry: This includes understanding basic geometric concepts, such as lines, angles, and shapes, and using them to solve problems.

4. Measurement: This includes understanding measurement concepts, such as length, area, and volume, and using them to solve problems.

5. Data analysis and probability: This includes understanding basic concepts of statistics, such as mean, median, and mode, and using them to analyze data and make predictions.

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Answer: In the class president election at Wilson Middle School, 296 students voted for Luke.

Step-by-step explanation:

Given    To find    Solution:  First, we replace  with  and  with :      Now, we finally replace  with   Therefore, the inverse of  is

Answer:y=(x-2)/4

Step-by-step explanation:

y=4x+2

4x=y-2

x=(y-2)/4

y=(x-2)/4

Answer:

10.125 hours

Step-by-step explanation:

We can convert 6 3/4 hours into minutes by multiplying it by 60

this equals 405. Jill spent 405 minutes doing homework.

Jack spent 1 1/2 times as long on his homework as Jill (1 1/2 is equivalent to 1.5)

We can multiply 1.5 x 405 and get 607.5 which means Jack spent 607.5 minutes doing homework

607.5 minutes is equivalent to 10.125 hours.

The properties of a rectangle are;

A rectangle is described as a quadrilateral shape with only two pairs of its sides equal.

The properties of a rectangle are given as;

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The properties of a rectangle is listed below;

A rectangle is referred to as a quadrilateral

The diagram of a rectangle is attached

A rectangle is a 4 sided shape and also four vertices

A rectangle is referred to as a quadrilateral

The opposite sides of a rectangle is opposite and equal to each other

The diagonals of a rectangle are equal

The diagonals of a rectangle bisects each other

Each interior angle of a rectangle is equal to 90°

The sum of all the interior angles is equal to 360°

Therefore, a four sided quadrilateral with two opposite sides equal is a rectangle.

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Step-by-step explanation:

So in order to find out how much he needs to sell, let's find out what the target is. We do that by working options A.

$19 for 40 hours

[tex]40 \times 19 = 760[/tex]

Now that we have 760, we know this amount is 8%. Next we setup a ratio

[tex] \frac{760}{x} = \frac{8\%}{100\%} [/tex]

We cross multiply

[tex]8x = (760)(100)[/tex]

[tex]8x = 76000[/tex]

Last but not least, we divide by 8 on both sides

[tex]x = 9500[/tex]

The temperature measure 92 is warmer than 40 by a measure of; 52.

It follows from the task content that it is required to be determined, how much warmer is 92 than 40.

Since the greater temperature measure is; 92 while the lesser is 40.

It can be concluded that the temperature difference is; 92 - 40 = 52.

Ultimately, the measure 92 is 52 warmer than 40.

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probability is calculated from the number of times an event happens, divided by the total number of trials in an actual experiment.

probability for choosing  C = 7/50

Answer:

b value is 3

rise = 3 run = -2

another point could be (2,0)

Step-by-step explanation:

The correct classification of the terms is:

Expression; 4x+20

Inequality: 4x+20 > 40

Equation: 4x+20 = 40

What is an expression?

An expression, often known as a mathematical expression, is a finite collection of symbols that are well-formed in accordance with context-dependent principles.

Here, we have

Given: 4x+20

4x+20>40

4x+20=40

We have to find their correct classification.

We concluded from an expression that

When an expression has the "=", then the expression is an equation.

When an expression has any of the following signs">, <, >=, <= or != ", then the expression is an inequality.

When the expression is neither an equation nor an inequality, then it is just an expression.

Hence, the correct classifications are:

Expression; 4x+20

Inequality: 4x+20 > 40

Equation: 4x+20 = 40

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Answer:  The height of the tree is approximately 44 ft.

Step-by-step explanation:  Step 1: Calculate the ratio of the person's height to the length of their shadow.

Person's Height: 5 ft

Length of Shadow: 4 ft

Ratio: 5 ft/4 ft = 1.25

Step 2: Use the ratio to calculate the length of the tree's shadow.

Length of Tree's Shadow: 22 ft

Ratio: 1.25

Calculation: 22 ft/1.25 = 17.6 ft

Step 3: Multiply the length of the tree's shadow by the ratio to calculate the tree's height.

Length of Tree's Shadow: 17.6 ft

Ratio: 1.25

Calculation: 17.6 ft x 1.25 = 22 ft

Answer: The height of the tree is approximately 44 ft.

The amount of the $ 3, 900 charge that Patrice has made after paying off the first month is $ 246.73.

To find the amount that Patrice has paid out of the $ 3, 900 charge to the credit card, look at the principal payments made since that day. Add them all up to get the amount paid from the charge.

The amount paid from the charge is :

= 42. 25 + 41. 79 + 41. 34 + 40. 89 + 40. 45 + 40. 01

= $ 246.73

In conclusion, out of the $ 3, 900 charge, Patrice has paid $ 246. 73.

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In order to finish the task in the allotted time, you would therefore need to ascend more quickly or decide to only climb the first two walls.

The Latin term minute, which means "small," is the root of both the adjective instant (my-NOOT), which denotes something that is incredibly small, and the substance minute (MIN-it), which denotes 60 seconds of time. Although the two terms have different pronunciations, they both refer to small sizes.

We can compute the overall time needed to scale all three barriers and compare it to the time available, which is 71/2 minutes or 450 seconds, to determine if you have enough time.

One wall takes 155 seconds to scale, so climbing three walls would take:

3 walls x 155 seconds per wall = 465 seconds

You wouldn't have enough time to scale all three walls inside the allotted time restriction because 465 seconds is longer than the amount of time that is accessible, which is 450 seconds.

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The units are 8 minutes, 28 centimeters.

The unit rate of the graph is 3.5 centimeters/minute

A unit rate is defined as the rate for one of something. For example, if 10 oranges cost $50, the unit rate will be $50/10 = $5 i.e.  $5 for one orange.

The 8 belongs to the time axis, so the unit is minute (min). The 28 belongs to the water level axis, so the unit is centimeters (cm).

The unit rate of the graph is time divided by the water level. That is:

unit rate = 28/8 = 3.5 centimeters/minute

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Answer:

y = 6x

Step-by-step explanation:

The line is sloping up at a rate of 6 y units per 1 x unit. So the slope is 6/1 (6x)

A graph of the system of inequalities is shown in the image attached below.

The region that represents the combinations of balloons and streamers that Tamara can purchase is the shaded region that contains the point (1, 3).

In order to write a system of linear inequalities to describe this situation, we would assign variables to the number of packages of balloons and number of streamer rolls respectively, and then translate the word problem into algebraic equation as follows:

Since one package of balloons costs $4.50 and streamers are $1.50 per roll, and Tamara wants to spend no more than $15 on decorations, a linear inequality to describe this situation is given by:

4.50x + 1.50y ≤ 15.

Additionally, Tamara knows she will be buying at least 2 rolls of streamers;

y ≥ 2

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Yes, The matrix does indeed have an inverse.

A rectangular or square array of figures, characters, or expressions arranged in rows and columns is known as a matrix. In many different disciplines, including computer science, engineering, physics, and mathematics, matrices are frequently employed and Matrix representations of physical phenomena, such as the wave functions in quantum mechanics, are common in physics. To represent and simulate complicated systems, like circuits and control systems, engineers employ matrices. Matrix-based techniques are utilised in a variety of computer science applications, including image processing, computer graphics, and machine learning.

The elements of a matrix, which are often written with a rectangular bracket, can be used to symbolise it.

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Yes, the inverse of a matrix exists if the determinant of the matrix is -13.

What is a matrix?

Linear equations are expressed using matrices, which are ordered rectangular arrays of numbers. Columns and rows make up a matrix. Mathematical operations like addition, subtraction, and matrix multiplication can also be done on matrices. If there are m rows and n columns, the matrix is represented as m × n matrix. The inverse of a matrix is available only for square matrices.

Now the determinant is a value that is associated with a square matrix.

The product of all the elements in any row or column and their corresponding co-factors is the determinant of a matrix.

For an inverse matrix to exist, the determinant of the matrix should not be zero. This is because the determinant of the inverse matrix is the inverse of the determinant of the original matrix.

If the determinant is zero, then the determinant of the inverse matrix will be 1/0, which is undefined.

So, as long as the determinant is not equal to zero, the inverse matrix exists.

Therefore the inverse of a matrix exists if the determinant of the matrix is -13.

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To find the two largest numbers in an array in Matlab, you can use the sort function and indexing to access the two largest elements.

Here's an example:

array = [3, 8, 2, 10, 5];

sorted_array = sort(array, 'descend');

largest_number = sorted_array(1);

second_largest_number = sorted_array(2);

In this example, we have an array of numbers called array. We use the sort function to sort the array in descending order, which means that the largest numbers will be at the beginning of the array. The resulting sorted array is assigned to a new variable called sorted_array.

We then use indexing to access the first and second elements of the sorted array, which will be the two largest numbers. These numbers are assigned to the variables largest_number and second_largest_number, respectively.

It's important to note that if the array contains duplicate values, this method will return the two largest unique values. If you want to find the two largest values including duplicates, you can use the max function twice with the 'omitnan' parameter to handle any NaN values in the array:

array = [3, 8, 2, 10, 5, 10];

largest_number = max(array, [], 'omitnan');

array_without_largest_number = array(array < largest_number);

second_largest_number = max(array_without_largest_number, [], 'omitnan');

In this example, we first find the largest number in the array using the max function with the 'omitnan' parameter to ignore any NaN values. We then create a new array that excludes the largest number, and use the max function again to find the second largest number in the new array.

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Answer:

4/12

Step-by-step explanation:

8/12 ÷ 2 = 4/12

Answer: 1/3

Step-by-step explanation:

8/12 divided by 2 is 1/3