The correct answer is d. observations, which is only the pretest summary.
Define the term pretest summary?A pretest summary is a summary of the data collected during a preliminary test or trial run.
The correct answer is d. observations.
The pretest summary is a summary of the data collected during a preliminary test or trial run, and it typically includes summary statistics such as the mean, variance, and degrees of freedom (df). However, the number of observations or sample size is typically not included in the pretest summary, as it is generally assumed to be the same as the number of observations in the full dataset. The number of observations is usually included in the full dataset summary, along with other descriptive statistics.
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Consider a football team with a 13
-game schedule. Each game ends with a win (W), a loss (L), or a tie (T). Once the schedule is set, how many ways can the schedule end with 9
wins, 3
losses, and 1
ties?
Answer:
Step-by-step explanation:
To find the answer, we can use the formula for combinations:
nCr = n! / r!(n-r)!
where n is the total number of games, r is the number of losses, and n-r-1 is the number of ties (since we already know there are 9 wins).
Substituting the values, we get:
13C3 * 10C1
= (13! / 3!10!) * (10! / 1!9!)
= (13*12*11 / 3*2*1) * 10
= 2860
Therefore, there are 2860 ways the schedule can end with 9 wins, 3 losses, and 1 tie.
reflect the figure over the line y= -2x - 1
The reflection of the figure over y = -2x - 1 is attached accordingly.
What is reflection in math?A reflection in mathematics is a mapping from a Euclidean space to itself that is an isometry with a hyperplane as a fixed point set; this set is known as the axis or plane of reflection.
Because the line of reflection has a slope of -1/2, each image point will be on a line with a slope of 2 that passes through the associated pre-image point.
It might be simplest to count the grid squares between the pre-image point and the line, then from the line to the image point's location. Those measurements will be the same.
The second attachment shows the mirrored image.
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1. a || b
2. k || m
3. Not enough information
The correct answer is "not enough information to prove any parallel lines."
What is the special property of two parallel lines?If two lines in a two-dimensional plane are parallel, then the corresponding angles formed by a transversal (a line that intersects both lines) are congruent (i.e., they have the same measure).
Additionally, the alternate interior angles (angles that are on opposite sides of the transversal and inside the pair of parallel lines), as well as the corresponding angles (angles that are in the same position relative to the transversal on the two parallel lines), are also congruent.
In the given diagram, line k is parallel to m, while line a is also parallel to line b but forming a transverse line to line k and line m. Also line k and line m form a transverse line to lines a and b.
So we can conclude that not enough information to prove any parallel lines.
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The answer is not all true. Thank you for the help!
Answer:
false ,true ,true
Step-by-step explanation:
Rick has earned a total of 581 points on all of his science test. His overall test average mean is 83. How many tests has Rick taken? PLEASE I NEED URGENT HELP
The number of tests Rick has taken are 7.
What is average?The average of given numbers is equal to the sum of all the values divided by the total number of values. It generally refers to a measure of central tendency or the typical value within a set of data points.
Define mean?The mean, or arithmetic mean, is the most commonly used type of average. It is calculated by adding up all the values in a data set and dividing by the total number of data points. Mathematically, the mean is represented as:
Mean = (Sum of all values) / (Total number of data points)
Based on the given conditions, formulate:
581/83 =7
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MEDICO Corporation makes several portable electronic devices used in hospitals. Some of these products require rechargeable batteries that MEDICO purchases from various suppliers. Although they try to find them at the best price, they must also consider the quality. In one case, two suppliers were being considered, and batteries were selected from various purchase dates. A test was run on the time the batteries would last in a certain device before it had to be recharged. The results are given in the table below.
Sample Statistics for Survey of Batteries
Supplier Number of Batteries Used in Test Mean Life Standard Deviation
Power+ 45 24 hours 5.1 hours
Electro 61 22 hours 2.6 hours
a) Set up the null and alternative hypotheses to see if the data supports the conclusion that the rechargeable batteries sold by Power+ last longer.
b) Check the conditions.
c) Calculate the test statistic.
d) Find the p-value.
e) Using α = 0.05, state your conclusion in the context of the problem.
The null hypothesis states that there is no distinction between the mean shelf life of the rechargeable batteries marketed by Power+ and Electro. Whereas, the alternative suggestion maintains that the mean duration of the batteries sold by Power+ stands greater than that of Electro.
The test statistic is 2.24
How to explain the statisticsUtilizing a t-distribution with degrees of freedom akin to the entire sample size minus two (df = n1 + n2 - 2 = 104) alongside the derived test statistic, the p-value can be accessed via calculator or software as 0.014.
As the figure procured from the p-value is lower than the significance level α = 0.05, we invalidate the null positing. The evidence warrants corroborating the allegation that the rechargeable batteries proffered by Power+ remain usable for longer than those provided by Electro.
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if the distance between the line x+y-5 and 3x+3y-k=0 is √18, find the value of k.
Therefore, the value of k could be either 6 or 24 if the distance between the line x+y-5 and 3x+3y-k=0 is √18.
What is equation?An equation is a statement that two mathematical expressions are equal. It contains an equal sign and can include variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. Equations can be used to solve problems, find unknown values, and model real-world situations.
Here,
To find the distance between the line x+y-5 and 3x+3y-k=0, we need to find the perpendicular distance between them.
The line x+y-5 can be written in slope-intercept form as y = -x + 5, and its slope is -1.
The line 3x+3y-k=0 can be rewritten as y = -x + k/3, and its slope is also -1.
Since the slopes of the two lines are the same, they are parallel. Therefore, the perpendicular distance between them is the distance between any point on one line and the other line.
Let's choose a point on the line x+y-5. We can choose (1,4) since it lies on the line. The distance between this point and the line 3x+3y-k=0 is:
|3(1) + 3(4) - k|/√(3²+3²)
Simplifying this, we get:
|15 - k|/3√2 = √18
Multiplying both sides by 3√2, we get:
|15 - k| = 3√2 * √18
= 9
This gives us two possible values for k:
15 - k = 9, which gives k = 6
or
k - 15 = 9, which gives k = 24
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collect data on the OBSERVATION table in ANNEXURE A to record 30 days of the minimum and maximum temperature in your community
The observation table in Annexure A records the minimum and maximum temperature in a community for 30 days.
To collect data on the observation table in Annexure A for 30 days of minimum and maximum temperature in your community, follow these steps:
Obtain a reliable source for temperature data: You can use local weather stations, online weather platforms, or mobile apps that provide accurate and up-to-date temperature information for your community.
Prepare the observation table:
Create a table in Annexure A with columns for Date, Minimum Temperature, and Maximum Temperature.
Make sure there are 30 rows for each day of observation.
Record daily temperatures:
For each day, note down the date and the minimum and maximum temperatures in their respective columns.
Be consistent with the time of day you record these temperatures, ideally early morning for the minimum and late afternoon for the maximum.
Repeat the process:
Continue recording daily temperatures for a total of 30 days.
Review and analyze the data:
Once the 30-day period is complete, you can analyze the data to observe trends or patterns in temperature variation.
Remember to be consistent in your data collection to ensure accurate and reliable results.
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A printer prints 17 prints per minute. How many minutes will it take to print 200 pages? Express your answer to the nearest whole number.
Answer:
12 minutes
Step-by-step explanation:
200/17
= 11.7
round up
12 minutes
All four of these inequalities are true. Use them to find the single whole-number value of g. Use that whole number to unlock the door. Your answer g>0 g≤100 4 5.5 is greater than g?
Find the area. ( Hint: First find x . )
Answer:
Step-by-step explanation:
in question no. 17
base=x
perpendicular=9
hipotanus=15
by applying pythagorus
(x)² + (9)² = (15)²
x=√(15)²-(9)²
x= √225-81
x=√144 = 12
now area of triangle = 1/2 ×base×height
= 1/2 × 12 × 9 = 54
area of figure 17 = 54 × 2 = 108
Which is the Which is the completely factored form of 4x2 + 28x + 49?
(x + 7)(4x + 7)
4(x + 7)(x + 7)
(2x + 7)(2x + 7)
2(x + 7)(x + 7)
completely factored form of 4x2 + 28x + 49?
URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
Answer:
see attached
Step-by-step explanation:
You want the 2-way table filled based on the descriptions of its contents.
TotalThe total number of students surveyed (240) goes in blank 9, where row and column headings are both "Total".
35%The number 35% × 240 = 84 goes in blank 7, the total number interested in athletics.
3/5The number 3/5 × 240 = 144 goes in blank 3, the total number interested in academic clubs.
26The number 26 goes in blank 1, which is in row 1 (interested in academic clubs) and in column 1 (interested in athletics). It is the number interested in both.
DifferencesBlank 2 is the difference between blank 3 and blank 1. It makes the total for the line be correct.
Blank 4 is the difference between blank 7 and blank 1. It makes the total for the column be correct.
Similarly, blanks 8 and 6 are differences that make the row and column totals (respectively) be correct.
Finally, blank 5 is the value that makes its row and column totals be correct. The fact that the one number makes two correct totals gives you a check on that number.
The filled table is shown in the first attachment. The calculations are shown in the second attachment.
Help me with this math if you can.
The actual distance between the two cities is equal to 288 miles.
What is a scale factor?In Geometry and Mathematics, a scale factor simply refers to the ratio of two corresponding side lengths in two similar geometric figures, which can be used to either horizontally or vertically enlarge (increase) or reduce (decrease or compress) a function that represents their size.
In Geometry, the scale factor of a geometric figure can be calculated by dividing the side lengths of the image by the side lengths of the pre-image:
Scale factor = length of image (new figure)/length of pre-image (actual figure).
Scale:
0.25 inch = 24 miles
0.25/24 = New distance/Actual distance
0.25/24 = 3/Actual distance
Actual distance = (24 × 3)/0.25
Actual distance = 288 miles.
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1. Determine the slope of a line given the table.
X
y
1
3
56
6
9
9
13
12
The slope of a line given the table is equal to 0.
How to calculate or determine the slope of a line?In Mathematics and Geometry, the slope of any straight line can be determined by using the following mathematical equation;
Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Slope (m) = rise/run
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
By substituting the given data points into the slope formula, we have the following;
Slope (m) = (9 - 9)/(3 - 1)
Slope (m) = 0/2
Slope (m) = 0.
Based on the table, the slope is the change in y-axis with respect to the x-axis and it is equal to 0.
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76. Write an equation of
the line that passes
through (3,-2) and
is (a) parallel and
(b) perpendicular to
the line shown.
-2
y
1,3 | 5x
(2,-1)
(1,-4)
The equation of the line that passes through (3,-2) and is (a) parallel to the line is y = 3x - 11 and (b) perpendicular to the line is y = - 1 / 3 x - 2.
How to find the equation of a line?The equation of a line can be represented in different form such as slope intercept form.
The equation of a line in slope intercept form can be represented as follows:
y = mx + b
where
m = slopeb = y-interceptHence, let's find the equation of a line passing through (3, -2) and is parallel to the line shown.
Parallel line have the same slope.
Hence,
m = -4 + 1 / 1 - 2
m = -3 / -1
m = 3
Therefore,
y = 3x + b
-2 = 3(3) + b
b = -2 - 9
b = -11
The equation is y = 3x - 11
Hence, let's find the equation of a line passing through (3, -2) and is perpendicular to the line shown.
The slopes of perpendicular lines are negative reciprocals of one another.
hence,
m = - 1 / 3
Therefore,
y = - 1 / 3 x + b
-2 = - 1 / 3(3) + b
b = -2 + 1
b = -2
Therefore, the equation is y = - 1 / 3 x - 2.
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a local team has 25 players, 30% of them are left handed. how many playrs are left handed
Step-by-step explanation:
30 % of 25 is
.30 * 25 = ~ 8 left handed ( rounded)
Verify the following identity. To transform the left side into the right side, should be changed to and the left side simplified.
To transform the left-hand side of the given identity "1 + cos(2x)" into the right-hand side "[tex]2cos^2(x)[/tex]", the expression "1" should be changed to "[tex]2sin^2(x)[/tex]" and the left-hand side should be simplified.
What is the meaning of trignometric identities?Trigonometric identities are mathematical equations that may be used to express trigonometric functions. These identities, which are also used to solve trigonometric equations, can be utilised to simplify and manage trigonometric expressions.
Trigonometric identities, which are derived from the geometric properties of triangles and the unit circle, provide a way to describe trigonometric functions in terms of other trigonometric functions or constants. In many areas of mathematics, physics, engineering, and other fields where trigonometry is used, they are commonly used.
Replacing "1" with "[tex]2sin^2(x)[/tex]".
[tex]1 + cos(2x) -- > 2sin^2(x) + cos(2x)[/tex]
Using the double angle formula for cosine
The double angle formula for cosine is: cos(2x) = [tex]2cos^2(x) - 1[/tex]
Substitute the double angle formula into the expression for cos(2x) on the left-hand side.
[tex]2sin^2(x) + cos(2x) -- > 2sin^2(x) + (2cos^2(x) - 1)[/tex] [Substitute cos(2x) with [tex]2cos^2(x) - 1[/tex]]
Simplify the expression on the left-hand side.
[tex]2sin^2(x) + (2cos^2(x) - 1) -- > 2sin^2(x) + 2cos^2(x) - 1[/tex] [Simplify using distributive property]
[tex]2sin^2(x) + 2cos^2(x) - 1 -- > 2(sin^2(x) + cos^2(x)) - 1[/tex] [Apply trigonometric identity [tex]sin^2(x) + cos^2(x) = 1[/tex]]
[tex]2(sin^2(x) + cos^2(x)) - 1 -- > 2(1) - 1[/tex] [Substitute [tex]sin^2(x) + cos^2(x)[/tex]with 1]
[tex]2(1) - 1 -- > 2 - 1\\2 - 1 -- > 1[/tex]
So, following simplification, the left-hand side equation "1 + cos(2x)" may be changed into "1." As a result, "1" in the equation needs to be altered to "2sin(x)" and the left side should be simplified to "1".
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Assume a corporation has earnings before depreciation and taxes of $110,000, deprecation of $48,000, and that is has a 30 percent tax bracket.
A. Compute it's cash flow using the following format.
Earnings before depreciation and taxes?
Depreciation?
Earnings before taxes?
Taxes?
Earnings after taxes?
Depreciation?
Cash flow?
B. How much would cash flow be if there were only $16,000 in depreciation? All other factors are the same.
Cash flow?
C. How much cash flow is lost due to the reduced depreciation from $48,000 to $16,000?
Cash flow lost?
A. The cash flow would be $91,400 if the depreciation were $48,000.
B. The cash flow would be $81,800 if the depreciation were $16,000.
C. The lost cash flow due to the reduced depreciation from $48,000 to $16,000 is $9,600.
How cash flow interacts with depreciation:A) Depreciation of $48,000:Earnings before depreciation and taxes = $110,000
Depreciation = $48,000
Earnings before taxes = $62,000 ($110,000 - $48,000)
Taxes (30%) = $18,600 ($62,000 x 30%)
Earnings after taxes = $43,400 ($62,000 - $18,600)
Depreciation $48,000
Cash flow = $91,400 ($43,400 + $48,000)
B) Depreciation of $16,000:Earnings before depreciation and taxes = $110,000
Depreciation = $16,000
Earnings before taxes = $94,000 ($110,000 - $16,000)
Taxes (30%) = $28,200 ($94,000 x 30%)
Earnings after taxes = $65,800 ($94,000 - $28,200)
Depreciation $16,000
Cash flow = $81,800 ($65,800 + $16,000)
C) Lost Cash Flow:Cash flow at $48,000 depreciation = $91,400
Cash flow at $16,000 depreciation = $81,800
Lost cash flow = $9,600 ($91,400 - $81,800)
Thus, we can learn that reduced depreciation increases the tax liability, thereby reducing the cash flow.
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A. The cash flow would be $91,400 if the depreciation were $48,000.
B. The cash flow would be $81,800 if the depreciation were $16,000.
C. The lost cash flow due to the reduced depreciation from $48,000 to $16,000 is $9,600.
How cash flow interacts with depreciation:A) Depreciation of $48,000:Earnings before depreciation and taxes = $110,000
Depreciation = $48,000
Earnings before taxes = $62,000 ($110,000 - $48,000)
Taxes (30%) = $18,600 ($62,000 x 30%)
Earnings after taxes = $43,400 ($62,000 - $18,600)
Depreciation $48,000
Cash flow = $91,400 ($43,400 + $48,000)
B) Depreciation of $16,000:Earnings before depreciation and taxes = $110,000
Depreciation = $16,000
Earnings before taxes = $94,000 ($110,000 - $16,000)
Taxes (30%) = $28,200 ($94,000 x 30%)
Earnings after taxes = $65,800 ($94,000 - $28,200)
Depreciation $16,000
Cash flow = $81,800 ($65,800 + $16,000)
C) Lost Cash Flow:Cash flow at $48,000 depreciation = $91,400
Cash flow at $16,000 depreciation = $81,800
Lost cash flow = $9,600 ($91,400 - $81,800)
Thus, we can learn that reduced depreciation increases the tax liability, thereby reducing the cash flow.
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simplify into one fraction
Answer:
Step-by-step explanation:
What is escape room answer for a high reward please
Answer:
840, 14
Step-by-step explanation:
(a.) In order to solve a, we first need to solve b since we're essentially dealing with proportions.
(b.) Our proportion to solve for miles per gallon is 350 miles / 25 gallons = x miles / 1 gallon where we solve for x:
[tex]\frac{350}{25}=\frac{x}{1}\\ \\ 25x=350\\\\x=14[/tex]
Thus, the gas mileage is 14 miles per gallon
(a.) Now, we can solve for part a. using the proportion x miles / 60 gallons = 14 miles / 1 gallon:
[tex]\frac{x}{60}=\frac{14}{1}\\ \\ x=840[/tex]
75 minutes after 8:15
A right rectangular prism has a length of 15 cm width of 10 cm and a height of 5 cm savanna claims that doubling the length width and height of the prism will double its surface area is Savannah, correct?
No, Savannah is incorrect. Doubling the length, width, and height of a right rectangular prism will not double its surface area.
What is surface area?Surface area is the total area of an object's exposed faces, including any external surface area. It is a measure of the size of a surface and is usually expressed in square units such as square meters or square centimeters. Surface area is a two-dimensional measurement, since it only takes into account the area of a surface, and not its thickness or volume.
The surface area of a right rectangular prism is calculated by multiplying the length by the width and then multiplying that number by two and adding the two products together.
For example, the surface area of a right rectangular prism with a length of 15 cm, a width of 10 cm, and a height of 5 cm is calculated as follows:
Surface area = (15 cm * 10 cm) + (15 cm * 5 cm) = 150 cm2 + 75 cm2 = 225 cm2
Doubling the length, width, and height of this right rectangular prism would give us a prism with a length of 30 cm, a width of 20 cm, and a height of 10 cm. The surface area of this new prism would be calculated as follows:
Surface area = (30 cm * 20 cm) + (30 cm * 10 cm) = 600 cm2 + 300 cm2 = 900 cm2
As you can see, doubling the length, width, and height of the right rectangular prism does not double its surface area - the surface area has increased by four times (900 cm2/225 cm2 = 4).
In conclusion, doubling the length, width, and height of a right rectangular prism does not double its surface area; rather, it increases the surface area by a factor of four.
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No, Savannah is incorrect. Doubling the length, width, and height of a right rectangular prism will not double its surface area.
What is surface area?Surface area is the total area of an object's exposed faces, including any external surface area. It is a measure of the size of a surface and is usually expressed in square units such as square meters or square centimeters. Surface area is a two-dimensional measurement, since it only takes into account the area of a surface, and not its thickness or volume.
The surface area of a right rectangular prism is calculated by multiplying the length by the width and then multiplying that number by two and adding the two products together.
For example, the surface area of a right rectangular prism with a length of 15 cm, a width of 10 cm, and a height of 5 cm is calculated as follows:
Surface area = (15 cm * 10 cm) + (15 cm * 5 cm) = 150 cm2 + 75 cm2 = 225 cm2
Doubling the length, width, and height of this right rectangular prism would give us a prism with a length of 30 cm, a width of 20 cm, and a height of 10 cm. The surface area of this new prism would be calculated as follows:
Surface area = (30 cm * 20 cm) + (30 cm * 10 cm) = 600 cm2 + 300 cm2 = 900 cm2
As you can see, doubling the length, width, and height of the right rectangular prism does not double its surface area - the surface area has increased by four times (900 cm2/225 cm2 = 4).
In conclusion, doubling the length, width, and height of a right rectangular prism does not double its surface area; rather, it increases the surface area by a factor of four.
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-12x to the power of 3 y to the power of 8
The mathematical expression is -12x³[tex]y^8[/tex].
We have,
-12x to the power of 3 y to the power of 8
Now, writing the mathematical expression
-12x to the power of 3 = -12x³
and, y to the power of 8 = [tex]y^8[/tex]
So, the expression can be written as
= -12x³[tex]y^8[/tex]
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evaluate cos(sin^-1 x0)
Answer:
Pull terms out from under the radical, assuming positive real numbers.
0
Step-by-step explanation:
What are all of the solutions to the trigonometric equation 2 cos²0-2sin²0= √3?
The solutions to the trigonometric equation 2 cos²0-2sin²0= √3 is option C.
What is a trigonometric equation?It should be noted that a trigonometric equation is one that contains a trigonometric function with a variable. For example, sin x + 2 = 1 is an example of a trigonometric equation.
The equations can be something as simple as this or more complex like sin2 x – 2 cos x – 2 = 0.
In this case, solutions to the trigonometric equation 2 cos²0-2sin²0= √3 is π/12 + πn and 11x/12 + πn
The correct option is C.
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Liliana's monthly budget is represented by the pie chart below. All amounts
are in dollars.
What percentage of her monthly budget does Liliana spend on car expenses?
A. 11%
B. 13%
C. 16%
D. 6%
Answer:
Step-by-step explanation
The first step is to add up all of the numbers to get the total budget.
Total Budget = 858 + 429 + 924 + 198 + 363 + 528 =3,300
Then to find the percentage for a certain category it is:
[tex]\frac{Budget Category}{Budget Total} times 100%[/tex]
So, 429 / 3300 x 100% = 0.13 x 100% = 13% Car Expense
Answer:
Step-by-step explanation
The first step is to add up all of the numbers to get the total budget.
Total Budget = 858 + 429 + 924 + 198 + 363 + 528 =3,300
Then to find the percentage for a certain category it is:
[tex]\frac{Budget Category}{Budget Total} times 100%[/tex]
So, 429 / 3300 x 100% = 0.13 x 100% = 13% Car Expense
Write the equation of the line that passes through the points (−9,1) and (−6,−1). Put your answer in fully simplified point-slope form, unless it is a vertical or horizontal line.
Some sources report that the weights of full-term newborn babies in a certain town have a mean of pounds and a standard deviation of pounds and are Normally distributed.
a. What is the probability that one newborn baby will have a weight within pounds of the meanthat is, between and pounds, or within one standard deviation of the mean?
b. What is the probability that the average of babies' weights will be within pounds of the mean; will be between and pounds?
c. Explain the difference between (a) and (b).
the screenshot is below
Answer:
Step-by-step explanation:
A
Find the exact value of x.
Applying the Pythagorean theorem, the exact values of x are:
1. x = 13 2. x = 4 3. x = 6 4. x = 8 5. x = 15 6. x = √7
How to Find the Exact Value of x Using the Pythagorean Theorem?If a and b are smaller sides (legs) of a right triangle, and c is the longest side (hypotenuse), the Pythagorean theorem states that:
c = √(a² + b²).
Apply the Pythagorean theorem to find the exact value of x:
1. x = √(12² + 5²)
x = 13
2. x = √(5² - 3²)
x = 4
3. x = √(10² - 8²)
x = 6
4. x = √(17² - 15²)
x = 8
5. x = √(12² + 9²)
x = 15
6. x = √(4² - 3²)
x = √7
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