Tₐ = 27 and Tₓ = 24 by solving the equation RₐTₐ + RₓTₓ = 150, where Rₐ = 2, Rₓ = 4, and Tₐ = Tₓ + 3.
We are given a condition RₐTₐ + RₓTₓ = 150, where Rₐ = 2, Rₓ = 4, and Tₐ = Tₓ + 3. We really want to track down the upsides of Tₐ and Tₓ.
Subbing the given qualities, we have:
2(Tₓ + 3) + 4Tₓ = 150
Growing the sections and streamlining, we get:
2Tₓ + 6 + 4Tₓ = 150
6Tₓ + 6 = 150
Taking away 6 from the two sides:
6Tₓ = 144
Partitioning the two sides by 6, we get:
Tₓ = 24
Accordingly, Tₓ is 24.
Now that we know Tₓ, we can track down Tₐ:
Tₐ = Tₓ + 3
Subbing the worth of Tₓ we got before, we get:
Tₐ = 24 + 3
Tₐ = 27
Accordingly, Tₐ is 27.
In outline, we were given the condition RₐTₐ + RₓTₓ = 150, where Rₐ = 2, Rₓ = 4, and Tₐ = Tₓ + 3. We tackled for Tₓ by subbing the given qualities and working on the situation. We observed that Tₓ is 24. Utilizing this worth of Tₓ, we tracked down Tₐ by subbing it into the articulation for Tₐ regarding Tₓ. We observed that Tₐ is 27.
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you are told the radius of the circle is 8. you may use 22/7 or 3.14. what is the circumference of the circle?
The circumference of a circle can be calculated using the formula C = 2πr, where C is the circumference, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius of the circle. In this case, the radius of the circle is 8 units. You can use either 22/7 or 3.14 as an approximation for π.
Using 22/7 for π:
C = 2(22/7) * 8 = (44/7) * 8 = 352/7 ≈ 50.29 units
Using 3.14 for π:
C = 2 * 3.14 * 8 = 6.28 * 8 = 50.24 units
Both approximations yield similar results for the circumference of the circle: 50.29 units when using 22/7 and 50.24 units when using 3.14. You may choose either of these values, depending on the desired level of accuracy. Keep in mind that these are approximations, and the true value of the circumference would involve using the exact value of π.
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Is it possible for a 4 by 4 matrix to be invertible when its columns do not span R4?
The sports book at the highroller Casino put the odds of a certain baseball team to win the World Series at one; 25 (1 to 25). Based on those odds, what is the probability that this baseball team will win the World Series?
There is a 3.8% chance that this baseball team will win the World Series.
If the sports book at the highroller Casino put the odds of a certain baseball team to win the World Series at 1:25, it means that for every one time the team wins, they will lose 25 times.
To calculate the probability, we need to use the following formula:
[tex]Probability = \frac{ Number of times the event will occur }{Total number of possible outcomes}[/tex]
In this case, the number of times the team will win is 1, and the total number of possible outcomes is 1 + 25 = 26 (1 win + 25 losses).
Therefore, the probability of this baseball team winning the World Series is:
[tex]\frac{1}{26} = 0.038 or 3.8%[/tex]
So, based on the odds given by the sports book, there is a 3.8% chance that this baseball team will win the World Series.
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FILL IN THE BLANK. "Test Yourself
If a and b are integers, the notation a | b denotes ________________ and the notation a / b denotes __________________ ."
If a and b are integers, the notation a | b denotes that a divides b, or in other words, that b is a multiple of a. The symbol "|" is read as "divides." For example, we write 2 | 6, which means that 2 divides 6 since 6 is a multiple of 2.
On the other hand, the notation a / b denotes the quotient of a divided by b, or in other words, the result of dividing a by b. The symbol "/" is read as "divided by." For example, we write 6 / 2 = 3, which means that the quotient of 6 divided by 2 is equal to 3.
It is important to note that the notation a | b and a / b are not equivalent. The former is a statement about the divisibility of two integers, while the latter is a numerical expression representing the result of dividing one integer by another.
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Consider a hash table of size 6. Place the keys 31, 32, and 19 in this table using chaining. Draw the evolution of the hash table for each key placement
In a hash table of size 6 with chaining, the keys 31, 32, and 19 will be placed in the table as follows:
Key 31: The hash value of 31 will be calculated using a hash function, which will generate a value between 0 and 5. Let's assume that the hash function generates a value of 1 for key 31. The value 31 will be placed in the linked list at index 1 of the hash table.
Key 32: The hash value of 32 will be calculated using the same hash function, which may generate a value different from 1. Let's assume that the hash function generates a value of 3 for key 32. The value 32 will be placed in the linked list at index 3 of the hash table.
Key 19: The hash value of 19 will be calculated using the same hash function, which may generate a value different from 1 and 3. Let's assume that the hash function generates a value of 0 for key 19. The value 19 will be placed in the linked list at index 0 of the hash table.
The evolution of the hash table for each key placement can be illustrated as follows:
Initially, the hash table is empty:
| | | | | | |
After placing key 31 in index 1:
| |31| | | | |
After placing key 32 in index 3:
| |31| |32| | |
After placing key 19 in index 0:
|19|31| |32| | |
As you can see, the values are placed in the linked lists at the respective indices of the hash table. This allows for efficient retrieval of values based on their keys, as the hash table can quickly locate the linked list where the value is stored.
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Best Buy was going out of business. At first they had all of the electronics marked at 10%off. They then marked everything down an additional 25% from the last posted price. What is the current price of a stereo set that originally cost $189?
Rounding to two decimal places, the current price of the stereo set is approximately $127.58.
To calculate the current price of the stereo set, we need to apply the discounts step by step.
First, the electronics were marked at 10% off. This means the price is reduced by 10% of the original price:
10% of $189 = 0.10 * $189 = $18.90
The price after the first discount is:
Original price - Discount = $189 - $18.90 = $170.10
Next, they marked everything down an additional 25% from the last posted price. This means the price is reduced by 25% of $170.10:
25% of $170.10 = 0.25 * $170.10 = $42.525
The current price of the stereo set after both discounts is:
Last posted price - Additional discount = $170.10 - $42.525 = $127.575
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Which table can be created using the equation below? –2 + 4x = y A 2-column table with 3 rows. Column 1 is labeled x with entries negative 5, 0, 3. Column 2 is labeled y with entries negative 22, negative 2, 10. A 2-column table with 3 rows. Column 1 is labeled x with entries negative 22, negative 2, 10. Column 2 is labeled y with entries negative 5, 0, 3. A 2-column table with 3 rows. Column 1 is labeled x with entries negative 5, 0, 3. Column 2 is labeled y with entries negative 18, negative 2, 10. A 2-column table with 3 rows. Column 1 is labeled x with entries negative 18, negative 2, 10. Column 2 is labeled y with entries negative 5, 0, 3. Mark this and return
Answer:
The correct answer is: A 2-column table with 3 rows. Column 1 is labeled x with entries negative 5, 0, 3. Column 2 is labeled y with entries negative 18, negative 2, 10.
To create the table, you can plug in each value of x into the equation -2 + 4x = y, then simplify to find the corresponding value of y. Here are the steps:
When x = -5:
-2 + 4(-5) = y
-2 - 20 = y
y = -22
When x = 0:
-2 + 4(0) = y
-2 + 0 = y
y = -2
When x = 3:
-2 + 4(3) = y
-2 + 12 = y
y = 10
So the table has 3 rows, with x-values of -5, 0, and 3, and corresponding y-values of -22, -2, and 10.
Need help with this. Anyone know the answers
Answer:
Parallelogram, quadrilateral, rectangle, square
Step-by-step explanation:
It is a quadrilateral because there are four sides to the shape. The sides are in two parallel pairs, as evidenced by the fact that the interior angles are all 90 degrees. The angles being 90 degrees in particular also makes the shape a rectangle. Lastly, because of the side measures we also know that the shape has to be a square, because a square has sides that are all the same.
Does an 11, 60, 61 triangle have a right angle? why or why not?
Yes, an 11, 60, 61 triangle has a right angle. This is because the Pythagorean theorem applies to right triangles, stating that the sum of the squares of the two shorter sides (legs) is equal to the square of the longest side (hypotenuse).
In this case, we can apply the theorem and see that 11^2 + 60^2 = 3721 + 3600 = 7321. Taking the square root of 7321 gives us approximately 85.4, which is the length of the hypotenuse.
Now, if we compare the square of the hypotenuse (85.4^2 = 7291.16) to the sum of the squares of the legs (11^2 + 60^2 = 3721 + 3600 = 7321), we can see that they are not equal. Therefore, the 11, 60, 61 triangle is not a right triangle.
However, if we compare the square of the hypotenuse (61^2 = 3721) to the sum of the squares of the legs (11^2 + 60^2 = 3721), we can see that they are equal. Therefore, the 11, 60, 61 triangle is a right triangle.
In conclusion, the 11, 60, 61 triangle has a right angle because it satisfies the Pythagorean theorem, which applies only to right triangles.
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Evaluate each logarithmic expression.
10. log5625
13. In (-e)
11. logg85
14. In e3
12. log3(-10)
15. log 150
[tex]log_{(150):[/tex] By default, a log without a base is assumed to be base 10. This evaluates to the power to which 10 must be raised to get 150. [tex]log10_{(150)[/tex] ≈ 2.1761.
How to solve[tex]log5(625)[/tex]: This evaluates to the power to which 5 must be raised to get 625. Since [tex]5^4[/tex]= 625, log5(625) = 4.
[tex]ln_{(-e):[/tex] The natural logarithm is only defined for positive arguments. Thus, ln(-e) is undefined.
[tex]logg(85):[/tex] The base of the logarithm is missing, making this expression invalid. Please provide the base.
[tex]ln(e^3)[/tex]): This evaluates to the power to which the base e must be raised to get [tex]e^3.[/tex]
Based on the fact that [tex]e^3 = e^3, ln(e^3) = 3.[/tex]
[tex]log3_{(-10)[/tex]: Logarithms are only defined for positive arguments. Thus, [tex]log3_{(-10)[/tex] is undefined.
[tex]log_{(150)[/tex]: By default, a log without a base is assumed to be base 10. This evaluates to the power to which 10 must be raised to get 150.
[tex]log10_{(150)[/tex] ≈ 2.1761.
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Suppose that the spun racquet lands with the label facing up 48 times out of 100. Explain, as if to a friend who has not studied statistics, why this result does not constitute strong evidence against believing that the spinning process is fair.
The result of 48 label-up spins out of 100 might be surprising, it is not strong evidence against believing that the spinning process is fair.
Imagine you have a racquet and you want to test if it's fair, meaning that it has an equal chance of landing with the label facing up or down when you spin it. You decide to spin the racquet 100 times and count how many times it lands with the label facing up. Surprisingly, you find that it landed with the label facing up 48 times out of the 100 spins.
Now, you might think that this result suggests that the spinning process is not fair, since it landed with the label facing up less than half of the time. However, this is not necessarily the case. In fact, this result alone is not enough to conclude that the spinning process is unfair or biased.
To understand why, we need to consider the concept of probability. Even if a process is completely fair, it is still possible to observe outcomes that are unlikely or even surprising. For example, if you flip a fair coin 10 times, it's possible (although unlikely) to get heads 9 or 10 times in a row.
Similarly, even if the spinning process is completely fair, it's possible (although unlikely) to observe 48 or fewer label-up spins out of 100. In fact, if the spinning process is fair, the probability of observing 48 or fewer label-up spins out of 100 is about 12%, which is not a very small probability.
Therefore, while the result of 48 label-up spins out of 100 might be surprising, it is not strong evidence against believing that the spinning process is fair. To make a stronger case for or against fairness, we would need to gather more data and perform statistical tests to evaluate the evidence.
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find the volume of a composite figure.
6ft, by 4ft, by 4ft, by 6ft, by 12ft equals
The Volume of the given composite shape is: 432 ft³
What is the Volume of the composite figure?The formula for the volume of a triangular prism is:
Volume = base area * height
The volume of a cuboid is:
Volume = Length * Width * Height
Thus:
Volume of composite shape = (6 * 12 * 4) + (6 * 6 * 4)
= 432 ft³
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The algebraic expression that represents the situation should be x + 4
The algebraic expression that represents the situation should be x + 4.
The expression x + 4 represents the sum of a variable x and a constant 4. In algebra, x is often used to represent an unknown value or a variable quantity, while constants are fixed values that do not change. Adding the two together gives us the expression x + 4. It is important to note that there is no operation or value given after the last plus sign in the expression provided, so it is incomplete. We need to know what to add to x and 4 in order to have a complete expression.
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\The number line shows the balance of Ama's credit card in dollars. For a credit card, a positive balance represents the amount charged to the card.
The correct matching is given below.
600 ⇒ Amount charged to Ama's credit card
0 ⇒ Zero balance.
|600| ⇒ Difference between Ama's balance and zero balance.
The credit card balance for Ama is displayed on the number line in US dollars. A credit card's positive balance indicates how much has been charged to the card.
A number line is often shown horizontally and can be postponed in any direction.
The number 600 represents the amount charged to Ama's credit card
The number 0 represents the zero balance.
The number |600| represents the difference between Ama's balance and zero balance.
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Q:11 WILL GIVE BRAINLIEST
A large retailer calculated the average hourly wage of employees over 6 years. The following table shows the years since 2016 and the average hourly wage of an employee at that time.
Years (since 2016) 0 1 2 3 4 5 6
Hourly Wage (in dollars) 9 9.5 10 11 12 13 14
Which of the following representations is most appropriate for showing the change in the average hourly wage each year?
scatter plot with the title average hourly wage and the x axis labeled years since 2016 and the y axis labeled hourly wage in dollars, with points at 0 comma 9, 1 comma 9 and a half, 2 comma 10, 3 comma 11, 4 comma 12, 5 comma 13, and 6 comma 14
line graph with the title average hourly wage and the x axis labeled years since 2016 and the y axis labeled hourly wage in dollars, with points at 0 comma 9, 1 comma 9 and a half, 2 comma 10, 3 comma 11, 4 comma 12, 5 comma 13, 6 comma 14, and line segments connecting each point
scatter plot with the title average hourly wage and the x axis labeled hourly wage in dollars and the y axis labeled years since 2016, with points at 9 comma 0, 9 and a half comma 1, 10 comma 2, 11 comma 3, 12 comma 4, 13 comma 5, and 14 comma 6
line graph with the title average hourly wage and the x axis labeled hourly wage in dollars and the y axis labeled years since 2016, with points at 9 comma 0, 9 and a half comma 1, 10 comma 2, 11 comma 3, 12 comma 4, 13 comma 5, and 14 comma 6, and line segments connecting each point
The representation which is most appropriate for showing the change in the average hourly wage is: A. scatter plot with the title average hourly wage and the x axis labeled years since 2016 and the y axis labeled hourly wage in dollars, with points at 0 comma 9, 1 comma 9 and a half, 2 comma 10, 3 comma 11, 4 comma 12, 5 comma 13, and 6 comma 14.
How to determine the line of best and change in the average hourly wage each year?In this scenario, the years would be plotted on the x-axis (x-coordinate) of the scatter plot while the hourly wage would be plotted on the y-axis (y-coordinate) of the scatter plot through the use of Microsoft Excel.
On the Microsoft Excel worksheet, you should right click on any data point on the scatter plot, select format trend line, and then tick the box to display an equation for the line of best fit (trend line) on the scatter plot.
From the scatter plot (see attachment) which models the relationship between the years and hourly wage, an equation for the line of best fit is given by:
y = 0.8571x + 8.6429
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6 How many of figure D does it take to fill figure E? How
does the volume of figure D relate to the volume of
figure E? Explain.
D
E
It will take (V₂ / V₁) number of figure D to fill the volume of figure E.
Since the volume of the figures is not given, let us assume that the volume of figure D is V₁ and that of figure E is V₂. Assume that it takes {x}, figure D to fill figure E. So, we can write the relation as -
V₁ {x} = V₂
{x} = (V₂ / V₁)
So, it will take (V₂ / V₁) number of figure D to fill the volume of figure E.
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12. The work on the right demonstrates all of the following EXCEPT (A) an interest in individual expression (B) a dependence on Classical prototypes (C) a limited use of shading and volume (D) a strong linear sense
The artwork described seems to exhibit all of the following characteristics EXCEPT B. a dependence on Classical prototypes.
This suggests that the artist's style is more focused on individual expression (A), with a unique approach to their subject matter, rather than relying on traditional styles or motifs from the Classical period.
Additionally, the artwork demonstrates a limited use of shading and volume (C), which might indicate a more simplified or stylized approach to form and depth. This characteristic might be a deliberate choice by the artist to emphasize certain elements or create a specific visual effect.
Furthermore, the strong linear sense (D) present in the work implies that the artist has prioritized clean, well-defined lines to establish the shapes and contours of the subjects. This approach can contribute to the overall clarity and structure of the composition.
To sum up, the artwork in question seems to prioritize individual expression, simplified shading and volume, and a strong linear sense, while not depending heavily on Classical prototypes for its inspiration.
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In a survey of more than 100,000 high school students in 2004 by researchers at the University of Connecticut, 83% agree with the statement "People should be allowed to express unpopular opinions. " If 8 students are selected a random, what is the probability that at least 6 agree with the statement?
Probability that at least 6 agree with the statement that "People should be allowed to express unpopular opinions" is 0.023.
Given that,
In a survey of more than 100,000 high school students in 2004 by researchers at the University of Connecticut, 83% agree with the statement "People should be allowed to express unpopular opinions. "
At least 6 means that number of students who agree the statement are 6, 7 or 8.
Probability of the students who agree in the statement = 83%
Number of students who agree out of 8 students = 8 × 83% = 6.64
Probability that 6 students agree with the statement = 83/100
Probability that 7 students agree with the statement = 17/100
Probability that 8 students agree with the statement = 17/100
Probability that at least 6 students agree = 0.83 × 0.17 × 0.17
= 0.023
Hence the required probability is 0.023.
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Shade the model to find the area of a desk pad three eights yards wide and 4/5 yard long
The area of a desk pad eight yards wide and 4/5 yards long is given as follows:
A = 0.3 yd².
What are the area and the perimeter of a rectangle?Considering a rectangle of length l and width w, we have that:
The area is given by A = lw.The perimeter is given by P = 2(l + w).The dimensions for this problem are given as follows:
w = 3/8 = 0.375 yd.l = 4/5 = 0.8.Hence the area is given as follows:
A = 0.375 x 0.8
A = 0.3 yd².
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emiko makes shibori scarves and sells them for 48$ each on a website for handmade goods the expression 48s represents the total price of buying csarves
The expression 48s represents the cost of the scarves.
Given
Emiko makes Shibori scarves and sells them for 48 each on a website for handmade goods the expression 48s represents the total price of buying scarves.
Let s represent the price of the scarves.
The cost of each scarves is 48.
Therefore,
The cost of scarves = Number of scarves × cost of each scarves.
The cost of scarves = s × 48
The cost of scarves = 48s
Hence, the expression 48s represents the cost of the scarves.
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Are these all correct? Thank you if you help me!
At the initial term, both patterns display identical values (0). From there on, succeeding terms in Pattern 1 encompass greater numbers than those of Pattern 2.
How to explain the informationIn this manner, as x-value (term figure) boosts, y-value (number in the framework) begin to amplify at a more rapid rate for the former sequence than for the latter.
The alliance between their analogous terms can be declared as a linear function where y-value for Pattern 1 is equivalent to that of Pattern 2, together with an extra 4 units. Simply put, the equation can be expressed as: y = x + 4.
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What’s the answer for
Subtract (1w+6) from (3w + 12)
The difference of the given expressions is 2(w+3).
The given expressions are (w+6) and (3w+12).
Subtract (w+6) from (3w+12), we get
3w+12-(w+6)
3w+12-w-6
By grouping like terms we get
(3w-w)+(12-6)
= 2w+6
= 2(w+3)
Therefore, the difference of the given expressions is 2(w+3).
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What is the factored form of x square +2ax+a square
[tex](x+a)^{2}[/tex] is the factored form of the expression.
The factored form of the expression [tex]x^{2}[/tex] + 2ax + [tex]a^{2}[/tex] is [tex](x+a)^{2}[/tex] .
We can see this by recognizing that this expression is a perfect square trinomial, which means it can be factored into the square of a binomial.
To find the binomial, we take the square root of the first and last terms, which gives us x and a respectively. Then, we double the product of these terms, which gives us 2ax. This is exactly the middle term of the original expression, so we can write:
[tex]x^{2}[/tex] + 2ax + [tex]a^{2}[/tex] is [tex](x+a)^{2}[/tex]
And that is the factored form of the expression.
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Use 9.81 m/s² for acceleration due to gravity.
An electric winch lifts a 20 kg crate 2.5 meters. If the winch must not exceed 100 watts during use, what is the fastest time that could be used to lift the crate?
5 seconds
3 seconds
6 seconds
4 seconds
A random sample of 10 parking meters in a resort community showed the following incomes for a day. Assume the incomes are normally distributed. Find the 95% confidence interval for the true mean. $3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8.00 $3.00
The 95% confidence interval that the true mean income for parking meters in the resort community falls between $3.14 and $5.28 per day.
To find the 95% confidence interval for the true mean income of parking meters in the resort community, we can use a t-distribution since our sample size is small (n=10).
First, we need to find the sample mean and standard deviation. The sample mean is simply the average of the incomes:
x = 4.21
The sample standard deviation can be found using the formula:
s = √[ Σ(xi - x)² / (n-1) ]
Now that we have the sample mean and standard deviation, we can use a t-distribution to find the 95% confidence interval. We need to find the t-value with 9 degrees of freedom (n-1), since our sample size is 10.
Using a t-table or calculator, we can find that the t-value with 9 degrees of freedom and a 95% confidence level is approximately 2.262.
The formula for the confidence interval is:
CI = x ± (t-value x s / √n)
Plugging in the values:
CI =($3.14, $5.28)
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Match vocabulary word to its example.
Credit score
Creditworthiness
Credit report
Shows how well previous debt has
been managed.
Gives an approved line of credit with
a agreed upon interest rate.
Helps lenders and others predict how
likely you are to make your credit
payments on time.
Assessment of how likely a borrower
will default or not make payments on
his or her debt obligations
Credit card
Credit is an important part of modern financial systems, and it is used to make purchases, access loans, and invest in different projects. Creditworthiness is a key factor in determining whether an individual can obtain a loan or a credit card.
Matching Vocabularies with Examples:
1. Shows how well previous debt has been managed. - Credit report
2. Gives an approved line of credit with an agreed-upon interest rate. - Credit card
3. Helps lenders and others predict how likely you are to make your credit payments on time. - Credit score
4. Assessment of how likely a borrower will default or not make payments on his or her debt obligations. - Credit worthiness
Credit Report:
A credit report is a detailed record of an individual's credit history, including past loans, credit card balances, and payment history. It provides information on how well a person has managed their previous debt obligations and their current outstanding balances. It also shows whether the person has been involved in any legal proceedings related to their credit.
Credit Card:
A credit card is a financial product that allows an individual to borrow money up to a certain credit limit approved by the lender. It provides a convenient and quick method of making purchases, but it comes with interest charges and fees that must be repaid on time.
Credit Score:
A credit score is a numerical representation of a person's creditworthiness. It is calculated based on the individual's credit report, payment history, current debt, and other factors. A higher credit score indicates a lower risk of defaulting on a loan or credit card payment.
Creditworthiness:
Creditworthiness refers to a borrower's ability to repay their debts and their overall financial health. It is an assessment of how likely a borrower is to default on their debt obligations. Lenders use creditworthiness to determine whether to approve a loan or credit card application and at what interest rate.
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56-6x3+7? Using pemdas
Answer:
Okay, let's solve this using PEMDAS (Please Excuse My Dear Aunt Sally):
56-6x3+7
Perform operations inside parentheses: There are no parentheses.
Multiply: 6 x 3 = 18
Subtract: 56 - 18 = 38
Add: 38 + 7 = 45
So the final answer is: 45
In steps:
56-6x3+7
6 x 3 = 18 (multiply)
56 - 18 = 38 (subtract)
38 + 7 = 45 (add)
Step-by-step explanation:
WORTH 35 PTS, HELP
how do you factor completely:
4x^2 + 20x + 200 = 0
it’s a quadratic equation..
the 4x is squared
The given quadratic equation cannot be factored as real factors.
Given quadratic equation is,
4x² + 20x + 200 = 0
We have to factor the equation.
Dividing throughout by 4,
x² + 5x + 50 = 0
Using the factorization method,
There exists two numbers p and q such that (x + p) (x + q) = 0, where pq = 50 and p + q = 5.
There are no such numbers.
If the equation is x² + 5x - 50 = 0, it can be factorized as (x + 10)(x - 5).
Since the equation is x² + 5x + 50 = 0, this cannot be factorized.
Hence this cannot be factorized.
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What is the product -3•(-7)
Answer:
21
Step-by-step explanation:
Since both 3 and 7 are negative numbers, they both cancel out using the rules for multiplication.
negative x negative = positive
Positive x negative = negative
Positive x positive = positive
4a. Jenna went on a 140-mile road trip. When it was not raining, she drove 50 miles per hour. When it was raining, she drove 40 miles per hour. It rained for 1 1/2 hours during her road trip. How many miles in total did Jenna drive when it was raining?
Jenna drove 80 miles when it was not raining, and 60 miles when it was raining, for a total of 140 miles during her road trip.
During Jenna's road trip of 140 miles, she drove at two different speeds due to weather conditions. When it was not raining, she drove at a speed of 50 miles per hour, which means she covered a distance of 50 x (140 - 1.5) = 6850 feet in that time.
When it was raining, she drove at a speed of 40 miles per hour for a duration of 1.5 hours. Using the formula Distance = Speed x Time, we can calculate the distance Jenna drove while it was raining:
Distance = 40 x 1.5 = 60 miles
Therefore, Jenna drove a total of 60 miles when it was raining during her road trip. To calculate the distance she drove when it wasn't raining, we can subtract the distance she drove while it was raining from the total distance of her road trip:
Total distance - Distance driven in the rain = 140 - 60 = 80 miles.
So Jenna drove 80 miles when it was not raining, and 60 miles when it was raining, for a total of 140 miles during her road trip.
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