Cara's first error occurred when she simplified the expression (negative 4) squared.
According to the order of operations (PEMDAS/BODMAS), exponentiation should be performed before any other operations. However, Cara incorrectly squared only the negative sign and not the entire number.
As a result, she obtained a value of positive 4 instead of 16.
To correct the error, Cara should have squared the entire value of -4. Squaring a negative number yields a positive result. Thus, (-4) squared is equal to 16. By failing to correctly apply this rule, Cara ended up with an incorrect value in her expression.
The correct evaluation of the expression should have been:
StartFraction 4 (7 minus 13) over 3 EndFraction + (negative 4) squared minus 2 (6 minus 2) = StartFraction 4 (-6) over 3 EndFraction + 16 minus 2 (4) = -8 + 16 - 8 = 0.
Therefore, Cara's first error was in incorrectly squaring only the negative sign and obtaining a value of 4 instead of 16.
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What is the coefficient in the expression
6-4x-8+2
Answer:
-4 is the coefficient or -4x whatever the answers are
Step-by-step explanation:
the coefficient in mathematics is basically whatever the number is infront of a variable in an expression, equation, etc.
50 POINTS GEOMETRY QUESTION
Answer:
first one, the one you have selected
Not sure whether to use integration by substitution or partial fractions?
Answer:
Step-by-step explanation:
I think you have to use partial fractions. Substitution won't work because the numerator is not the derivative of the denominator. I hope I am correct on this.
I have attached just the partial fractions part of the question. I did not integrate.
Dewan’s bank account balance is -$16.75. He deposits checks totaling $23.59. What is his new balance? -$1.08
Answer:
$6.84
Step-by-step explanation:
This is quite a simple question, simply add the new deposited amount into the original balance to get your answer.
Original balance: -$16.75Deposit: $23.59New balance: -$16.75 + $23.59 = $6.84Please help urgent thank you I am so confused
The speed of the boat in water without a current is 15 miles per hour
Calculating the speed of the boat in water without a current?From the question, we have the following parameters that can be used in our computation:
Current of river = 4 miles per hour
Distance travelled = 209 miles
Time = 30 hours.
Represent the speed with x
So, we have
Upstream = x - 4Downstream = x + 4Next, we have
Time = Speed/Distance
So, we have
209/(x - 4) + 209/(x + 4) = 30
When evaluated, we have
x = 15
Hence, the speed is 15 miles per hour
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need to get this right
The diameter of the engine cylinder is written in the form
|d - 5| ≤ 0.005
How to select the better expressionTo represent the diameter of an engine cylinder with a tolerance of ±0.005 cm and a desired width of 5 cm, we can use an absolute value inequality.
The absolute value inequality representing the permissible limit of variation can be written as:
|d - 5| ≤ 0.005
where:
d represents the diameter of the engine cylinder.
In this inequality, the absolute value of the difference between the diameter (d) and the desired width (5 cm) must be less than or equal to the given tolerance of ±0.005 cm.
This means that the diameter of the engine cylinder can vary within ±0.005 cm of the desired width of 5 cm.
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What are the coordinates of the image of vertex P
Answer:
(- 7, 4 )
Step-by-step explanation:
under a reflection in the x- axis
a point (x, y ) → (x, - y ) , then
P (- 7, - 4 ) → (- 7, - (- 4) ) → (- 7, 4 )
What is the five-number summary for the data set? 73, 62, 90, 28, 45, 90
Answer:
it's easy
Step-by-step explanation:
first take a deep breath and then search it
(2, 5); (3, 6); (4, 11); (5, 14); (6, 15). The following linear function is fitted to the data: y = 2x + 2. Plot the residuals.
For the data point (2, 5), the residual is 5 - 6 = -1. For the data point (3, 6), the residual is 6 - 8 = -2. For the data point (4, 11), the residual is 11 - 10 = 1. For the data point (5, 14), the residual is 14 - 12 = 2. For the data point (6, 15), the residual is 15 - 14 = 1.
To plot the residuals for the given linear function, we need to calculate the difference between the actual y-values of the data points and the corresponding predicted y-values based on the linear function.
Let's start by calculating the predicted y-values using the linear function y = 2x + 2 for each x-value in the dataset:
For x = 2, the predicted y-value is 2(2) + 2 = 6.
For x = 3, the predicted y-value is 2(3) + 2 = 8.
For x = 4, the predicted y-value is 2(4) + 2 = 10.
For x = 5, the predicted y-value is 2(5) + 2 = 12.
For x = 6, the predicted y-value is 2(6) + 2 = 14.
Now we can calculate the residuals by subtracting the predicted y-values from the actual y-values.
To visualize these residuals, we can create a scatter plot with the x-values on the horizontal axis and the residuals on the vertical axis. Each data point will represent the x-value from the dataset and its corresponding residual. The residuals can be either positive or negative, so we should include both sides of the vertical axis.
By plotting the residuals, we can observe the deviations between the actual y-values and the predicted y-values based on the linear function. This plot helps us assess how well the linear function fits the data and identify any patterns or trends in the residuals.
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An import company brought into the country some amplifiers that cost sh. 3,750-each. The government imposed an import duty of 125% and a sales tax of 20 %. If the company decided to make a 10% profit on the sales, calculate the selling price of each amplifier.
Answer:
To calculate the selling price of each amplifier, we need to consider the cost, import duty, sales tax, and the desired profit margin.
Cost of each amplifier: sh. 3,750
Import duty of 125% on the cost:
Import duty = 125% of sh. 3,750
= 125/100 * sh. 3,750
= sh. (125/100 * 3,750)
= sh. 4,687.50
Cost of each amplifier including import duty:
Total cost = Cost + Import duty
= sh. 3,750 + sh. 4,687.50
= sh. 8,437.50
Sales tax of 20% on the total cost:
Sales tax = 20% of Total cost= 20/100 * sh. 8,437.50
= sh. (20/100 * 8,437.50)
= sh. 1,687.50
Total cost including sales tax:
Total cost = Total cost + Sales tax
= sh. 8,437.50 + sh. 1,687.50
= sh. 10,125
Desired profit margin of 10% on the total cost:
Profit = 10% of Total cost
= 10/100 * sh. 10,125
= sh. (10/100 * 10,125)
= sh. 1,012.50
Selling price of each amplifier:
Selling price = Total cost + Profit
= sh. 10,125 + sh. 1,012.50
= sh. 11,137.50
What is the solution, if any, to the inequality |3x|\ge0? all real numbers no solution x\ge0 x\le0
Answer:
all real numbers
Step-by-step explanation:
Try a negative number, a positive number and zero for x.
All of them work.
Answer: all real numbers
A dime is flipped, and a single die is rolled. Find the odds against obtaining a head.
Answer:
11 : 1
Step-by-step explanation:
The probability of obtaining a head when a dime is flipped is 1/2, since there are two possible outcomes (heads or tails) and each is equally likely.
The probability of rolling any particular number on a fair six-sided die is 1/6, since there are six equally likely outcomes (the numbers 1 through 6).
To find the odds against obtaining a head and rolling any number on the die, we need to multiply the probabilities of the two events. This gives us
(1/2) x (1/6) = 1/12
So the probability of obtaining a head and rolling any number on the die is 1/12.
To find the odds against this event, we need to compare the probability of the event happening to the probability of it not happening. The probability of the event not happening is 1 - 1/12 = 11/12.
Therefore, the odds against obtaining a head and rolling any number on the die are:
11 : 1
In circle M below, diameter AC, chords AB and BC, and radius MB
are drawn.
The statement which is not true about the circle M is ∆ABM is isosceles.
The correct answer choice is option 2.
Which statement is not true?Based on the circle M;
diameter AC,
chords AB and BC,
radius MB
Isosceles triangle: This is a type of triangle which has two equal sides and angles.
Equilateral triangle is a triangle which has three equal sides and angles.
Hence, ∆ABM is equilateral triangle.
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2. Sandra's house is located at the point (2,2). The school is located at the point (7, 10). Each
unit on the graph represents 1 mi. How far is the school from Sandra's house? Remember to
show your work.
Plot and label your points on the coordinate plane (1 point)
Use the Pythagorean Theorem to calculate the diagonal distance between the two
points, express your answer as a radical and as a decimal rounded to nearest
hundredths.
Answer:
Step-by-step explanation:
Ms. Lee used two dozen Mud Bugs in her suit the recipe makes 20 cups of soup approximately how many Mud Bugs are in each cup of soup round off the answer to the nearest whole number
Answer:
1
Step-by-step explanation:
So, 1 dozen is 12. Two dozen is 24.
She used 24 Mud Bugs in this soup.
This soup makes 20 cups.
So, 24 Mud Bugs are in 20 cups of soup.
To find the amount of Mud Bugs in each cup of soup, you divide the amount of Mud Bugs by the number of cups.
24/20
Which equals 1.2
You asked for the nearest whole number, so there is 1 Mud Bug per sup of soup.
What is the perimeter of a rectangle with workings
Answer:
See below
Step-by-step explanation:
The perimeter of a rectangle is [tex]P=2L+2W[/tex] where L is the length and W is the width.
3.1 LU1: MATHEMATICS IN SOCIETY
Read section 1.3: Defining Mathematics - in your study guide and provide the
differences between the three views used to outline the mathematics consideration.
(10)
The views shown in section 1.3, that are used to outline the mathematics consideration are:
Formalist Intuitionist Platonist How do these outlines compare ?The main difference between the three views is their stance on the nature of mathematical objects. The formalist view sees mathematical objects as abstract symbols that have no meaning outside of the formal system.
The intuitionist view sees mathematical objects as mental constructs that are derived from intuition. The Platonist view sees mathematical objects as abstract entities that exist independently of the human mind.
Another difference between the three views is their stance on the relationship between mathematics and the physical world. The formalist view sees mathematics as independent of the physical world.
The intuitionist view sees mathematics as being influenced by the physical world, but not completely determined by it. The Platonist view sees mathematics as being completely independent of the physical world.
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How do I interpret residuals and just this entire page? I slacked off for my statistics class and I need all of this and all the terms on this page explained so I can do my other assignments. Also are my previous answers correct?
a. The interval of time between eruptions if the previous eruption lasted 4 minutes is 86.51 minutes.
b. The residual for this cycle is 2.07 minutes.
c. The interval of time between eruptions lasted for 2.07 minutes than the regression line equation predicted.
d. The slope of the regression line means that the interval of time between eruptions increases by 13.29 minutes for every additional minute of the previous eruption.
e. No, the value of the y-intercept doesn't have meaning in the context of the problem.
How to determine the interval of time between eruptions?Based on the information provided above, the relationship between the duration of the previous eruption (x in minutes) and the interval of time between eruptions (y in minutes) is modeled by this regression line equation:
ÿ = 33.35 + 13.29x
Part a.
When x = 4 minutes, the value of is given by:
ÿ = 33.35 + 13.29(4)
ÿ = 86.51 minutes.
Part b.
The residual for the given cycle can be calculated as follows;
Residual = y - ÿ
Residual = 62 - (33.35 + 13.29(2))
Residual = 62 - 59.93
Residual = 2.07 minutes.
Part c.
Based on the calculation above, we can logically deduce that the interval of time between eruptions lasted for 2.07 minutes than the equation of regression line predicted.
Part d.
The slope of the regression line is equal to 13.29 and it implies that the interval of time between eruptions increases by 13.29 minutes for every additional minute of the previous eruption.
Part e.
In the context of the problem, we can logically deduce that the value of the y-intercept doesn't have any meaning because the duration of the previous eruption cannot be equal to 0 minutes.
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Al bought a CD player for $100, then sold it for $125. He then bought it back for $150. Later he sold it for $175. Did he make money, lose money, or break even? Explain.
His total expenditure is $100. After that, he sold the CD player for $125. As a result, he earned $25.
Al initially bought a CD player for $100 and then sold it for $125. After that, he bought it back for $150 and later sold it for $175. The question is whether Al made money, lost money, or broke even.
Let's examine the transactions in more detail to determine the answer.
Initially, Al bought the CD player for $100.
Now his total income is $25 and his expenditure remains at $100. Next, he purchased the same CD player again for $150. This adds to his expenditure, which is now $250.
Later, he sold the CD player for $175, which means he earned another $25, bringing his total income to $50 (i.e., $25 from the first sale and $25 from the second sale).
Since Al's total expenditure was $250 and his total income was $50, he lost money. He spent more than he earned.
He sold the CD player twice and earned a total of $50, which is less than what he spent on the CD player, which was $250. Al had a net loss of $200 ($250 - $50). Therefore, he lost money.
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A city currently has 2.08 thousand residents. Each year the city's population grows by around 420 persons.
After 14 years what will the approximate population of the city be? Round to three significant digits.
Approximately
thousand residents.
Answer:
the approximate population of the city after 14 years will be 7.96 thousand residents.
Step-by-step explanation:
to calculate the approximate population of the city after 14 years, we need to take into account the annual growth rate.
Given that the city's population grows by around 420 persons each year, we can calculate the total growth over 14 years by multiplying the annual growth rate by the number of years:
14 years × 420 persons/year = 5,880 persons
To find the approximate population after 14 years, we add the total growth to the current population:
2.08 thousand + 5.88 thousand = 7.96 thousand
50 Points! Multiple choice geometry question. Photo attached. Thank you!
Answer:
B. 7
Step-by-step explanation:
3/KL = 12/28
KL = 3/(12/28) = (28 x 3)/12 = 7
point slope form (0,12), (-6,0)
This is the equation of the line in point-slope form, where the slope is 2 and the given point is (0, 12).
To find the equation of a line in point-slope form, we need a point on the line and the slope of the line.
Given the points (0, 12) and (-6, 0), we can calculate the slope using the formula:
slope = (y2 - y1) / (x2 - x1)
Using the coordinates (0, 12) as (x1, y1) and (-6, 0) as (x2, y2):
slope = (0 - 12) / (-6 - 0)
slope = -12 / -6
slope = 2
Now that we have the slope, we can use the point-slope form of the equation:
y - y1 = m(x - x1)
Using the point (0, 12) as (x1, y1) and the slope (m) as 2:
y - 12 = 2(x - 0)
Simplifying the equation:
y - 12 = 2x
This is the equation of the line in point-slope form, where the slope is 2 and the given point is (0, 12).
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Find the perimeter of a triangle with sides that are5 yards ,6 yards and 4 Yards
Given the set of data
4
10
2
18
15
would finding the best predicted value for x = 20 be an example of interpolation or extrapolation?
a. Extrapolation since 20 is not within the range.
b. Extrapolation since 20 is within the range.
The correct answer is b. Extrapolation since 20 is within the range.
In this scenario, finding the best predicted value for x = 20 would be an example of extrapolation. Extrapolation involves estimating values outside the given range of data based on the trend or pattern observed within the existing data.
Given the data set: 4, 10, 2, 18, 15, we can see that the values provided are not in any particular order. To perform extrapolation, it is generally helpful to first examine the trend or pattern within the data. However, without additional information or context, it is difficult to determine the underlying trend in this case.
Since the given data set does not explicitly indicate any pattern or trend, any estimation made for x = 20 would be considered extrapolation. Extrapolation involves projecting or extending the existing trend or pattern beyond the known data points. In this case, the value of 20 falls outside the range of the given data set, so estimating its corresponding value would require extending the trend beyond the known data points.
Consequently, the appropriate response is b. Extrapolation since 20 is within the range.
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An isosceles triangle has two angles both equal to x. The third angle is 45 degrees bigger than either of these. Find the value of x.
Let's use the fact that the sum of the angles of a triangle is always 180 degrees to solve this problem. Let the two equal angles be x, then the third angle is x + 45.Let's add all the angles together:x + x + x + 45 = 180Simplifying this equation, we get:3x + 45 = 180Now, we need to isolate the variable on one side of the equation. We can do this by subtracting 45 from both sides of the equation:3x = 135Finally, we can solve for x by dividing both sides of the equation by 3:x = 45Therefore, the value of x is 45 degrees.
Answer:
45°
Step-by-step explanation:
An isosceles triangle has two angles both equal to x. The third angle is 45 degrees bigger than either of these. Find the value of x.Let's turn the question into an equation
180 = x + x + x + 45
180 - 45 = 3x
135 = 3x
x = 135 : 3
x = 45°
------------------
check
180 = 45 + 45 + 45 + 45
180 = 180
same value the answer is good
Use the 2021 marginal tax rates in the table to compute the tax owed by the person with the given filing status and taxable income.
Single with a taxable income of $61,000
The tax owed is $_____.
(Type an integer or a decimal. Round to the nearest cent as needed.)
The amount of tax owed is $13,420
How to determine the amount of tax owedFrom the question, we have the following parameters that can be used in our computation:
Single with a taxable income of $61,000
Using the table of marginal tax, we have
Tax = 22%
So, we have
Tax = 22% * 61000
Evaluate
Tax = 13420
Hence, the amount of tax owed is $13,420
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Choose the system of inequalities that best matches the graph below.
Answer: D
Step-by-step explanation:
Hope it helps
Cos5pi/3 =
A. 3/2
B.1/2
C. 2/2
D.-2/2
HELPP
Answer:
B) 1/2
Step-by-step explanation:
Note that pi=180.
Then we have 180/3=60 and so 5*60=300.
Thus cos 300=1/2.
Therefore, cos 5pi/3=1/2.
Answer: B
Step-by-step explanation:
Find the measure of KV
LEO
K
L
V
N
128°
M
202°
The measure of the arc angle KV is 54 degrees.
How to find angle measure in a circle?If two chords intersect inside a circle, then the measure of the angle formed is one half the sum of the measure of the arcs intercepted by the angle and its vertical angle.
Therefore, let's find the arc angle KV in the circle as follows:
Hence,
let
arc angle KV = x
128 = 1 / 2 (202 + x)
128 = 101 + 0.5x
128 - 101 = 0.5x
27 = 0.5x
divide both sides by 0.5
x = 27 / 0.5
x = 54 degrees.
Therefore,
arc angle KV = 54 degrees.
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In circle F, FG = 2 and m/GFH = 120°
Find the area of shaded sector. Express your answer as a fraction times T.
Answer:
A = [tex]\frac{4}{3}[/tex] π
Step-by-step explanation:
the area (A) of the sector is calculated as
A = area of circle × fraction of circle
= πr² × [tex]\frac{120}{360}[/tex] ( r is the radius of the circle )
here r = FG = 2 with central angle = 120° , then
A = π × 2² × [tex]\frac{1}{3}[/tex]
= [tex]\frac{4}{3}[/tex] π