A laptop computer originally priced at $2100 now ell for $2,200. What i the percent of increae?
The percent of increase is 4.761 %
Given :
A laptop computer originally priced at $2100 now and sell for $2,200.
Percentage :
In mathematics, a percentage is a number or ratio that can be expressed as a fraction of 100.
If we have to calculate percent of a number, divide the number by the whole and multiply by 100.
Difference = sell price - original price
= 2200 - 2100
= 100
Percent of increase = 100 * 100 / 2100
= 100 * 1 / 21
= 100 / 21
= 4.761 %
Therefore 4.761 % increase in percent.
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If an angle does not have a measure of 88°, then the angle is not an acute angle.
7.9.2 solving the skid distance problem if she had stayed on the road the driver would have needed ___ ft to come to a complete stop after she saw the cow
The driver would have needed 76 feet to come to a complete stop after she saw the cow assuming she stayed on the road.
What is stopping distance?Stopping distance can be defined as a measure of the distance between the time when a brake is applied by a driver to stop a vehicle that is in motion and the time when the vehicle comes to a complete stop (halt).
In this scenario, we can infer that the driver would have needed 76 feet to come to a complete stop after she saw the cow assuming she stayed on the road.
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if you multiply the number by to end at 4 the results you gave will be the same of three times the number decreased by 7
Answer:
11
Step-by-step explanation:
Let the number be x,
2x+4 = 3x-7
Collect like terms
2x-3x= -4-7
-x =. -11
Multiply both sides by -1
x. =. 11
Oh and I think you made a typo and missed the 2, " if you multiply the number by 2 to end at 4..........."
Hope This Helps :)
4. Which of the following lines has a negative slope?
a.
b.
c.
d.
e. none of the above
Answer:
A
Step-by-step explanation:
You can tell it has a negative slope because the line is moving down
hope this helps <3
Please help due in 4 minutes
20 points if the answer is right
Answer:
8.50
Step-by-step explanation:
just divide 2 and 17 and so on
Dexter deposits $200 in a bank account that earns 3% simple intrest.How much money will he have in the account after 1 year
Answer:
$206
Step-by-step explanation:
The amount that would be in the account = amount deposited + interest earned on deposit
interest earned on deposit can be determined by determining the simple interest
Simple interest = principal x time x interest rate
principal = the amount deposited = $200
Time = the duration of the deposit = 1 year
interest rate = the percentage on deposit that would be earned = 3%
200 x 0.03 x 1 = $6
The amount that would be in the account = $200 + $6 = $206
Find the value of cos �
B rounded to the nearest hundredth, if necessary. B
C
D
4
8
Answer:
cos�
=
cosB=
Find the value of cos
�
B rounded to the nearest hundredth, if necessary
cos B = \(\frac{BC}{BD}\) \(=\frac{4}{8}\) \(=\frac{1}{2}\) c = [a2 + b2 - 2ab cos C] is the cosine formula used to determine the side of the triangle. a, b, and c are indeed the triangle's three sides. is that response accurate.
How do you calculate sin and cos B?
Formula: Sin (a,b) Cos
Sin a cos b = (1/2)[sin(a + b) + sin(a - b)] is the formula for sin a cos b. Whenever the composite angles (a + b) and (a - b) are available, as well as the quantities of degrees a and b, following equation for sin a cos b may be used.
How does the cosine rule work?
Every triangle that you would like to connect all 3 components to a single angle can benefit from the cosine rule. Knowing the other 2 aspects and indeed the opposing angle are necessary to determine the lengths of a side. It's edge a that you're looking for.
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true or false a data set can have the same mean, median, and mode
Answer:
True
Step-by-step explanation:
You want to know if it is true a data set can have the same mean, median, and mode.
Mean, median, modeThe mean of a dataset is the average of all of its elements. The median is the middle one, or the average of the middle two elements. The mode is the most common element.
There is nothing in the definitions of these that prevents their being the same value. For a normally-distributed set of data, these all have the same value. A dataset does not need to be normally distributed (or even symmetrical) for these measures of center to be identical.
True
alculate the margin of error for a sampling distribution that has a size of 36 for a 95% confidence level. The population standard deviation is known to be 12.
For a sampling distribution that has a sample size of 36 for a 95% confidence level and the population standard deviation is known to be 12, then the margin of error will be 3.98.
Given that the sample size is 36, confidence level is 95% and the population standard deviation be 12.
We are required to find the margin of error of the sampling distribution.
Margin of error is the difference between real values and the calculated values of the sampling distribution.
Margin of error=z*σ/\(\sqrt{n}\)
,in which σ is population standard deviation and n is the sample size.
z value of 95% confidence level is 1.96.
Margin of error=1.96*12/\(\sqrt{36}\)
=1.96*12/6
=1.96*2
=3.98
Hence for a sampling distribution that has a sample size of 36 for a 95% confidence level and the population standard deviation is known to be 12, then the margin of error will be 3.98.
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Two cars are traveling along a straight road. Car A maintains a constant speed of 77.0 km/h. Car B maintains a constant speed of 114 km/h. At t=0, car B is 45.0 km behind car A. How long does it take before car A is overtaken by car B?
Answer: 72.97 Minutes
Step-by-step explanation: We have two cars, A and B, traveling along a straight road. Car A is moving at a constant speed of 77.0 km/h, while car B is moving at a constant speed of 114 km/h. At the starting point (t=0), car B is 45.0 km behind car A.
To figure out how long it takes for car B to catch up and overtake car A, we need to consider their relative speeds. The relative speed is the difference between the speed of car B and the speed of car A.
Relative speed = Speed of car B - Speed of car A
Relative speed = 114 km/h - 77.0 km/h
Relative speed = 37.0 km/h
So, car B is moving 37.0 km/h faster than car A. Now, we need to determine the time it takes for car B to cover the initial distance between them, which is 45.0 km.
To calculate time, we use the formula: Time = Distance / Speed. In this case, the distance is 45.0 km, and the speed is the relative speed of 37.0 km/h.
Time = 45.0 km / 37.0 km/h ≈ 1.2162 hours
Now, let's convert the time to minutes by multiplying it by 60 (since there are 60 minutes in an hour).
Time = 1.2162 hours * 60 minutes/hour ≈ 72.97 minutes
Therefore, it takes approximately 1.2162 hours or 72.97 minutes for car B to catch up and overtake car A.
Hope this helps!
Calculate the simple interest earned as a amount R1400 at an annual interest rate 6.5% over 3 years?
Answer:
principle (p)=Rs1400
Rate(R)=6.5
time(T)=3
we know that
I=P×I×T/100
=1400×6.5×3/100
=273
therefore the simple interest earned is Rs273
the side lengths of triangle ABC are written in terms of the variable P where p is greater than or equal to 3
Answer:
m∠C > m∠A > m∠B
Explanation:
The measure of every angle is proportional to the measure of its opposite side. So, we need to organize the lengths of the sides from least to greater in order to identify the correct answer.
Then, if p is equal to 3, we get:
AB = 4p - 1 = 4(3) - 1 = 11
AC = p + 4 = 3 + 4 = 7
CB = 3p = 3(3) = 9
If p = 4, we get:
AB = 4(4) - 1 = 15
AC = 4 + 4 = 8
CB = 3(4) = 12
Therefore, no matter the value of p, we get that
AB > CB > AC
Since C is the opposite angle of AB, A is the opposite angle of CB and B is the opposite angle of AC, we get:
m∠C > m∠A > m∠B
Complementary angles are two angles whose
measures add to 90°. The ratio of the measures of
two complementary angles is 7:11. What are the
measures of the angles?
Answer:
let the two complementary angles be x and 90-x
x= 7t (say)
90-x= 11t
x+90-x=90= 7t+11t=18t
90=18t
t=90/18= 10/2= 5
so x= 7×5=35 degrees
and 90-×=90-35=55 degrees
Answer:
Step-by-step explanation:
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x= 7t (say)
90-x= 11t
x+90-x=90= 7t+11t=18t
90=18t
t=90/18= 10/2= 5
so x= 7×5=35 degrees
and 90-×=90-35=55 degrees
Ms. Bell's mathematics class consists of 6 sophomores, 11 juniors, and 13 seniors. How many different ways can Ms. Bell create a 5-member committee of seniors if each senior has an equal chance of being selected?
There are 1287 different ways Ms. Bell can create a 5-Member committee of seniors from her class.
Ms. Bell's mathematics class consists of 6 sophomores, 11 juniors, and 13 seniors. The task is to determine the number of different ways Ms. Bell can create a 5-member committee of seniors, with each senior having an equal chance of being selected.
To solve this problem, we can use combinations. The number of ways to select a committee of 5 seniors from a group of 13 can be calculated using the combination formula:
C(n, k) = n! / (k!(n - k)!)
Where n represents the total number of elements (seniors in this case), and k represents the number of elements to be selected (5 in this case). The exclamation mark denotes the factorial of a number.
Using the combination formula, the number of ways to select a 5-member committee from 13 seniors is:
C(13, 5) = 13! / (5!(13 - 5)!) = 13! / (5! * 8!) = (13 * 12 * 11 * 10 * 9) / (5 * 4 * 3 * 2 * 1) = 1287
Therefore, there are 1287 different ways Ms. Bell can create a 5-member committee of seniors from her class.
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find a power series for f(x) 1/1-x^2 centered at 0. write the first four nonzero terms
The power series for f(x) 1/(1-x²) centered at 0 is:
1 + x² + x⁴ + x⁶ + ...
The first four nonzero terms are 1, x², x⁴, x⁶.
How to find power series for a function?The power series expansion for the function f(x) = 1/(1-x²) centered at 0 can be found using the geometric series formula.
By letting a=1 and r=x²,
we get the series 1 + x² + x⁴ + x⁶ + ..., which converges for |x|<1.
This is because as x approaches 1 or -1, the terms of the series diverge.
Thus, the first four non-zero terms of the series are 1 + x² + x⁴ + x⁶.
This power series expansion is useful in many applications, such as in approximating the function near x=0 or in solving differential equations using power series methods.
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Solve the inequality x + 2 > 6.
Answer:
x > 4
Step-by-step explanation:
x + 2 > 6
-2 -2
x > 4
Which statement accurately describes the combined
functions, P(x) and A(x)?
O P(x) has a constant rate of change, but A(x) does
not.
O A(x) has a constant rate of change, but P(x) does
not.
Both P(x) and A(x) have a constant rate of change.
O Neither P(x) nor A(x) have a constant rate of
change.
Answer: A
Step-by-step explanation:2020 edg
Answer: the answer is A
Step-by-step explanation:
just did it on edge
13. four girls run a one-mile race. one runner's time is 8 minutes and 45 seconds,another runner's time is 8 minutes and 57 seconds, and a third runner's time is 9 minuteand 23 seconds. if the average time for the four girls was 8 minutes and 30 seconds, whatwas the fourth runner's time?c)a.6 minutes, 55 seconds7 minutes, 15 seconds7 minutes, 35 second8 minutes, 30 seconds
By subtracting the sum of the times for the first three runners from the average time for the four girls, we found that the fourth runner's time is 55 seconds.
To find the fourth runner's time, we can subtract the sum of the times of the first three runners from the total average time for the four girls.
Average time for the four girls = 8 minutes and 30 seconds
Sum of the times for the first three runners = 8 minutes and 45 seconds + 8 minutes and 57 seconds + 9 minutes and 23 seconds
Converting all the times to seconds, we have:
Sum of the times for the first three runners = 525 seconds + 537 seconds + 563 seconds
= 1625 seconds
Now, we subtract the sum of the times for the first three runners from the average time for the four girls:
Fourth runner's time = Average time - Sum of times for first three runners
= 8 minutes and 30 seconds - 1625 seconds
Converting 8 minutes to seconds, we have:
Fourth runner's time = 8 minutes and 30 seconds - 480 seconds - 1625 seconds
= 0 minutes and 55 seconds
Therefore, the fourth runner's time is 55 seconds.
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A line passes through the points (-2, 8) and
(5,-20). Which points lie on the same line?
Select all that apply.
(-6, -2)
(-3, 12)
(4, 16)
(0, 6)
(-1, 4)
(7,5)
The points that lies on the same line are (-3, 12), and, (-1, 4).
Here, we have,
The given coordinate points are (-2, 8) and (5,-20).
Here, slope (m)= 8+20/-2-5
= 28/-7
=-4
Substitute m= -4 and (x, y)=(-2,8) in y=mx+c, we get
8 = 8+c
or, c = 0
So, the equation of a line is y= -4 x
Now,
(-6, -2) in the given equation is -2=-4 (-6)
-2≠ 24
(-3, 12) in the given equation is y= -4 x
12 = 12
(4, 16) in the given equation is y= -4 x
16 ≠ -16
(0, 6) in the given equation is y= -4 x
6 ≠ 0
(-1, 4) in the given equation is y= -4 x
4 = 4
(7,5) in the given equation is y= -4 x
5 ≠ -28
Therefore, the points that lies on the same line are (-3, 12), and, (-1, 4).
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P is a function that gives the cost, in dollars, of mailing a letter from the United States to Mexico in 2018 based on the weight of the letter in ounces, w. The function is defined by this set of rules:
The function is defined by this set of rules and we got the cost of mailing a letter weighing 2.5 ounces from the United States to Mexico in 2018 using function P is $2.89.
Based on the rules, the function P is defined as follows:
P(w) = 1.15, if 0 < w ≤ 1
P(w) = 1.99, if 1 < w ≤ 2
P(w) = 2.89, if 2 < w ≤ 3
P(w) = 3.30 + 0.45(w-3), if 3 < w
This function gives the cost, in dollars, of mailing a letter from the United States to Mexico in 2018 based on the weight of the letter in ounces, w.
To find the cost of mailing a letter weighing 2.5 ounces using function P, we need to evaluate P(2.5). Based on the rules defined above, we can see that 2 < 2.5 ≤ 3. Therefore, the cost of mailing a letter weighing 2.5 ounces would be:
P(2.5) = 2.89
So, it would cost $2.89 to mail a letter weighing 2.5 ounces from the United States to Mexico in 2018 using function P.
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Find the missing length
Answer:
d) 7
Step-by-step explanation:
by converse of mid point theorem it would be that GH BISECTS JL so LH would be 7
can anyone tell me how 1164÷8 = 145.5? I don't get it
Step-by-step explanation:
1160 divided by 8 is 145
so 1164 tecnically can't be divided by 8 normally so it comes in decimal form .
Answer:
1160 divided by 8 is 145
Step-by-step explanation:
but yah
an bag contains 4 pink balls, 9 purple balls, and 2 white balls. three balls are selected, one after the other, without replacement. find the probability that all three balls are purple.
The probability of selecting all three purple balls is 0.1429 or approximately 14.29%.
To find the probability that all three balls are purple, we need to use the formula for the probability of the intersection of three events:
P(A and B and C) = P(A) x P(B|A) x P(C|A and B)
where A, B, and C are the events of drawing a purple ball from the bag on the first, second, and third draws, respectively.
The probability of drawing a purple ball on the first draw is:
P(A) = number of purple balls / total number of balls = 9 / 15
After drawing a purple ball on the first draw, there are now 8 purple balls left in the bag out of a total of 14 balls, so the probability of drawing a purple ball on the second draw, given that a purple ball was drawn on the first draw, is:
P(B|A) = number of purple balls left / total number of balls left = 8 / 14
After drawing two purple balls, there are now 7 purple balls left in the bag out of a total of 13 balls, so the probability of drawing a purple ball on the third draw, given that two purple balls were drawn on the first two draws, is:
P(C|A and B) = number of purple balls left / total number of balls left = 7 / 13
Therefore, the probability of drawing three purple balls in a row is:
P(A and B and C) = P(A) x P(B|A) x P(C|A and B) = (9 / 15) x (8 / 14) x (7 / 13) = 0.1429 or approximately 14.29%
So, the probability of selecting all three purple balls is 0.1429 or approximately 14.29%.
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What’s the answer for 6x + 5 = 2x -15 ?
Answer:
x = -5
Step-by-step explanation:
You wish to test whether an association exists between a categorical variable (such as a rank of a professor at a university, assuming four ranks) and a numerical variable (such as yearly salary).
To test for an association between a categorical variable and a numerical variable, you can use a statistical method called Analysis of Variance (ANOVA).
In this case, you would use a one-way ANOVA to compare the mean salaries of professors across the four different ranks. This would allow you to determine if there is a significant difference in salary between the different ranks. It is important to note that ANOVA assumes that the numerical variable is normally distributed and that the variances are equal across the different groups. Additionally, post-hoc tests may be necessary to determine which specific groups have significantly different mean salaries. Keep in mind that the sample size and distribution of data can affect the validity of your results. A larger sample size and more normally distributed data will generally result in more accurate conclusions. To test the association between a categorical variable (professor rank with four levels) and a numerical variable (yearly salary), you can use the Analysis of Variance (ANOVA) test. ANOVA helps determine if there are significant differences among the means of different groups (ranks) and if these differences are not due to random chance. If the ANOVA test results show a significant association, it implies that the professor's rank is related to their yearly salary.
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4c + 5 < 4c + 3
What’s the answer and explanation to the answer ?
Answer:
see below
Step-by-step explanation:
4c + 5 < 4c + 3
Subtract 4c from each side
4c-4c + 5 < 4c-4c + 3
5 < 3
This is never true so there are no solutions
Solve for x. Round to the nearest tenth of a degree, if necessary.
Check the picture below.
\(tan(x)=\cfrac{\stackrel{opposite}{50}}{\underset{adjacent}{42}}\implies tan(x)=\cfrac{25}{21}\implies x=tan^{-1}\left( \cfrac{25}{21} \right)\implies x\approx 50^o\)
Make sure your calculator is in Degree mode.
Annabella spends $2.25 per gallon on gas at the gas station. After driving a certain distance, she stops at a second gas station and spends $2.15 per gallon on gasoline.Annabella can express her average cost per gallon of gasoline as 2.25 x 2.15(x 5)2x 5.What is the meaning of the parts of this rational expression in the context of the situation
(2x + 5)² in the denominator represents the total number of gallons of gas purchased in the whole trip squared.
Annabella spends $2.25 per gallon on gas at the gas station. After driving a certain distance, she stops at a second gas station and spends $2.15 per gallon on gasoline.
Annabella can express her average cost per gallon of gasoline as 2.25 × 2.15(x + 5)/(2x + 5)²
The meaning of the parts of this rational expression in the context of the situation are as follows: 2.25 and 2.15 are the cost per gallon of gas at the two different gas stations.
x represents the number of gallons of gas bought at the first station.
5 is the number of miles driven between the first and second gas stations. And 2x + 5 is the total number of gallons of gas used in the entire trip (from the first gas station to the second).
Therefore, (x + 5) is the amount of gasoline bought from the second gas station, and 2x is the amount of gasoline bought from the first gas station.
The expression (x + 5)/(2x + 5) represents the weighted average of the cost per gallon of gas at the two gas stations.
Finally, (2x + 5)² in the denominator represents the total number of gallons of gas purchased in the whole trip squared.
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A painter can paint 15 square feet every 1/4 hour. How many square feet can they paint in one hour?
A painter can paint 60 square feet every 1 hour.
What is Multiplication?
To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.
Given that;
A painter can paint 15 square feet every 1/4 hour.
Now,
Since, A painter can paint 15 square feet every 1/4 hour.
Let painter can paint in every 1 hour = x square feet
So, By definition of proportional as;
⇒ 15 / (1/4) = x / 1
Solve for x as;
⇒ 15 × 4 = x
⇒ x = 60 square feet
Thus, A painter can paint 60 square feet every 1 hour.
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