Answer:
Step-by-step explanation:
The discriminate part of the quadratic solution is sqrt(b^2 - 4ac). If this is less than 0, then you get an imaginary result.
a = 2 b= 4 c = 2
sqrt(4^2 - 4 * 2 * 2)
sqrt(16 - 16) = 0
a does not give any imaginary roots.
Try D
a = 3 b= 2 c = 1
sqrt(2^2 - 4*3 * 1)
sqrt(4- 12)
sqrt(-8)
This gives you an imaginary zero because - 8 has an imaginary sqrt.
the probability of winning the grand prize at a particular carnival game is 0.005. michele wins the grand prize. is this considered a rare or common event? why?
1) The event is considered as rare.
2) It is called a rare event event because the probability is less than 5% and is well below threshold.
Let's discuss it further below.1) The probability of winning the grand prize is 0.005, which means there is a 0.5% chance of winning the prize.
Since this probability is low, Michele winning the grand prize is considered a rare event.
The term "rare event" is often used to describe an event with a low probability of occurrence.
A rare event typically has a probability of less than 5%, and in this case, the probability is well below that threshold. A probability of less than 0.05 is generally considered a rare event.
The fact that Michele won the grand prize means that she defied the odds, which makes the event rare.
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Find an ordered pair that represents the vector from (-3.7,2) to (-4, -5).
a.
(-7.7,-3)
c.
(1.3,7)
b.
(-0.3,-7)
d.
(7.7,3)
Answer:
Option b: (-0.3, -7)
Step-by-step explanation:
If we have two points v = (x₁, y₁) and w = (x₂, y₂)
The vector that connects these two points and starts in point v, is written as:
vector = w - v = (x₁, y₁) - (x₂, y₂) = (x₂ - x₁, y₂ - y₁)
In this case, we want to find the vector that goes from (-3.7,2) to (-4, -5).
Then we will have:
vector = (-4, -5) - (-3.7,2) = (-4 - (-3.7), -5 - 2)
vector = (-0.3, -7)
Then the correct option is b.
Com oordon
9)
Consider the sequence of steps to solve the equation: 2(x – 4) + 6x = 9x – 10
Given = 2(x - 4) + 6x = 9x - 10
Step 1 = 2x - 8 + 6x = 9x - 10
Step 2 = 2x + 6x - 8 = 9x - 10
Step 3 = 8x - 8 = 9x - 10
Step 4 = 8x – 8x - 8 = 9x - 8x - 10
Step 5 = 0 - 8 = x - 10
Step 6 = -8 = x - 10
Step 7 = -8 + 10 = x - 10 + 10
Step 8 = 2 = x + 0
Step 9 = 2 = x
Which step in solving this equation is justified by the distributive property
Answer:
Step 1
Step-by-step explanation:
The problem distributed 2 into x and -4 which resulted in 2x - 8
NEED HELP IN FIVE MINUTE PLZ HURRY
Answer:
R=.2,P=.25, G=.55
Step-by-step explanation:
Rebekah performed an experiment with a standard number cube. She rolled the cube and recorded the results in the frequency table. The frequency table is given below. Find the experimental probability of the cube landing on three.
Answer:
Step-by-step explanation:
The experimental probability of the cube landing on three is 1/10.
for a walk-a-thon a sponsor committed to give to give you a flat fee of $5 plus $2 for every Mile you walk write an expression for the total amount you collected from the sponsor at the end of The Walking on expression
The graph of the exponential function f(x) is shown below. Which statement about the features of the graph for f(x) is correct?
A. The value of f(x) doubles for every 4 unit increase in x
B. The value of f(x) is increasing for each unit decrease in x
C. The value of f(x) is decreasing for each unit increase in x
D. The y -intercept of f(x) is 40
B .The value of f(x) is increasing for each unit decrease in x about the graph is correct.
What is the graph of exponential function?
The graphs of exponential functions are nonlinear—because their slopes are always changing, they look like curves, not straight lines
Exponential function f(x) is given
According to given graph, The value of f(x) is increasing for each unit decrease in x
Therefore, The statement, The value of f(x) is increasing for each unit decrease in x about the graph is correct.
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Python Problem
Produce 100,000 random numbers with a normal distribution.
Use the average = 3 and standard deviation = 1.2.
Compute the average and standard deviation of these 100, 000 numbers then plot the histogram of these values with bins = 0.05, and a range of -0.6 - 6.6 (plus and minus three standard deviations).
Codes could be useful:
import numpy as np
import matplotlib.pyplot as plt
%matplotlib inline
random_numbers = np.random.normal(3, 1.2, 100000); average, std_dev = np.mean(random_numbers), np.std(random_numbers); plt.hist(random_numbers, bins=np.arange(-0.6, 6.7, 0.05), range=(-0.6, 6.6), edgecolor='black'); plt.show()
Python code that generates 100,000 random numbers with a normal distribution, computes their average and standard deviation, and plots a histogram:
import numpy as np
import matplotlib.pyplot as plt
# Set the random seed for reproducibility
np.random.seed(0)
# Generate 100,000 random numbers with normal distribution
average = 3
std_dev = 1.2
num_samples = 100000
random_numbers = np.random.normal(average, std_dev, num_samples)
# Compute the average and standard deviation of the random numbers
computed_average = np.mean(random_numbers)
computed_std_dev = np.std(random_numbers)
# Plot the histogram
bins = np.arange(-0.6, 6.7, 0.05)
plt.hist(random_numbers, bins=bins, range=(-0.6, 6.6), edgecolor='black')
plt.xlabel('Values')
plt.ylabel('Frequency')
plt.title('Histogram of Random Numbers')
plt.grid(True)
plt.show()
# Print the computed average and standard deviation
print('Computed Average:', computed_average)
print('Computed Standard Deviation:', computed_std_dev)
Make sure you have the NumPy and Matplotlib libraries installed in your Python environment before running this code. The resulting histogram will show the distribution of the generated random numbers, and the printed values will display the computed average and standard deviation.
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34.98+12.24=?
answers please
Answer:
Hello!
After reading your question I have calculated the correct answer to be:
47.22
Step-by-step explanation:
The way I solved this equation was I first split the equation into two parts.
I took the two whole numbers, being "34" and "12", and made their own equation:
"34+12=?"
And then I took the two partial numbers "0.98" and "0.24" and made their own equation:
"0.98+0.24=?"
I then solved both equations:
"34+12= 46"
"0.98+0.24= 1.22"
And added those two solutions together to come up with the final solution:
"46+1.22= 47.22"
Hope this helped!
Answer:
47.22 is the answer
Step-by-step explanation:
hope it helps you
Martha's homemade spice mix in different size at the craft fair the graph shows a proportional relationship between teaspoons and cumin and teaspoons of chili powder in one recipe.what does the what are the coordinates of the point at x equals 1 and what do they represent? explain why the graph shows are a proportional why is the graph a solid line?
At x = 1, the coordinates are (1, 4)
They represent the proportionality of 1 teaspoon of cumin and 4 teaspoons of chili powder.
The graph is proportional because as x increases, y al
Find the area of the wall.
Answer:24
Step-by-step explanation:
9+((1 divided by 2)x30)
arrange the following in descending order. 1. 56, 0.56, 15.6 1.65
Answer:
15.6, 1.65, 1.56, .56
Step-by-step explanation:
it is just greatest to least
8. A going out of business sale has the entire store marked 80% off. Which of the following is equivalent to
80%?
F.
3
4
G. 0.08
4
H
J. 8.0
ANSWER IF YOU CAN AND AS FAST AS YOU CAN NO LINKS!!!!!!! PLEASE HELP
Answer:
G. 0.08
Step-by-step explanation:
It is actually 0.8 but putting a zero before 8 is fine.
0.0008=0.8
0.8000=X
Determine the relationship between the two triangles and whether or not they can be proven to be congruent.
Answer:
The two triangles are related by hypotenuse leg
so the triangles are congruent
======================================================
Explanation:
The square markers indicate we have 90 degree angles. This means the two triangles are right triangles.
The tickmarks tell us which sides correspond and are the same length. The double tickmarked sides are the hypotenuses of each triangle. They are the same length because of the matching tickmarks. The same can be said about the legs marked with single tickmarks.
Based on those tickmarks, and the fact we have right triangles, we can use the hypotenuse leg theorem to prove the triangles are congruent.
The hypotenuse leg theorem only works for right triangles.
Since "hypotenuse leg" is used quite often in geometry, it is abbreviated to "HL".
If 3 times a certain number is increased by 4 the result is 28. What is the number?
Answer:
8
Step-by-step explanation:
8x3 = 24
24 + 4 = 28
Know this answer? please help! Thanks!
Answer:
you have it right, its 60. since all sides are equal, then all angles must be equal. triangles are 180, so 180 divided by 3= 60
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
It is an equilateral triangle. An equilateral triangle has three equal sides and angles. It will always have angles of 60° in each corner.
What is the solution to the system of equations graphed below?
Answer:
a) (2,4)
Step-by-step explanation:
it's where the points meet
.2. Determine whether the feasible set for each of the following systems of constraints is convex, and if not, indicate points x^1 and x² that violate definition. a) (x1)² + (x2)² > 9
x1 + x2 ,10
x1, x2 > 0
The feasible set for this system of constraints is not convex, and the points (5, 5) and (3, 7) violate the convexity definition.
To determine whether the feasible set for each system of constraints is convex, we need to analyze the constraints individually and examine their intersection.
a) (x1)² + (x2)² > 9
This constraint represents points outside the circle with a radius of √9 = 3. The feasible set includes all points outside this circle.
b) x1 + x2 ≤ 10
This constraint represents points that lie on or below the line x1 + x2 = 10. The feasible set includes all points on or below this line.
c) x1, x2 > 0
This constraint represents points in the positive quadrant, where both x1 and x2 are greater than zero.
Now, let's analyze the intersection of these constraints:
Considering the first two constraints (a and b), we can see that the feasible set consists of all points outside the circle (constraint a) and below or on the line x1 + x2 = 10 (constraint b).
To determine whether the feasible set is convex, we need to check if any two points within the set create a line segment that lies entirely within the set.
If we consider the points (5, 5) and (3, 7), both points satisfy the individual constraints (a) and (b). However, the line segment connecting these two points, which is the line segment between (5, 5) and (3, 7), exits the feasible set since it passes through the circle (constraint a) and above the line x1 + x2 = 10 (constraint b).
Therefore, the feasible set for this system of constraints is not convex, and the points (5, 5) and (3, 7) violate the convexity definition.
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A watering can dispenses water at the rate of 0.25 gallon per minute. The original volume of the water in the can was 6 gallons. Which set of ordered pairs shows the volume of water in the can in gallons, (y) as a function of time in minutes, (x) from the first minute after the can starts dispensing water?
A. {{1, 6.0), (2, 5.75), (3, 5.50}}
B. {{6.0, 1), (5.75,2), (5.50, 3}}
C.{{1, 5.72), (2, 5.50), (3,5.25}}
D{{5.75,1), (5.50,2), (5.25, 3}}
Answer:
C.{{1, 5.72), (2, 5.50), (3,5.25}}
When distribution is shown as a symmetrical bell-shaped curve, what can be concluded about the data?
a. The mean, median, and mode are equal.
b. The mean is less than the median and mode.
c. The data shows moderate uniformity.
d. The mean is greater than the median and mode.
When a distribution is shown as a symmetrical bell-shaped curve then the mean, median, and mode are equal i.e., option (a) is correct.
A symmetrical bell-shaped curve, also known as a normal distribution or Gaussian distribution, is characterized by its symmetry around the mean.
In this type of distribution, the mean, median, and mode all coincide at the center of the curve.
This means that the central tendency measures, such as the mean (average), median (middle value), and mode (most frequent value), are all equal.
Option (a) states that the mean, median, and mode are equal, which aligns with the properties of a symmetrical bell-shaped curve. This equality occurs because the data is evenly distributed on both sides of the mean, resulting in a balanced distribution.
Options (b) and (d) suggest that the mean is either less than or greater than the median and mode, which does not hold true for a symmetrical distribution.
In a symmetrical distribution, the mean is located at the center of the data, and the median and mode share the same value as the mean.
Option (c) mentions moderate uniformity, but a symmetrical bell-shaped curve does not specifically indicate uniformity. Uniformity refers to a distribution where all data points have equal probability, resulting in a flat line.
In contrast, a symmetrical bell-shaped curve indicates a normal distribution with the majority of data concentrated around the mean, gradually decreasing towards the tails.
Therefore, based on the given options, option (a) is the correct conclusion when the distribution is shown as a symmetrical bell-shaped curve.
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Car X travels 174 miles in 3 hours.
a. Write the equation of the line that describes the relationship between distance and time. Use x for the time in hours and y for the distance in miles.
b. What is the graph that represents the relationship between distance and time for Car X? Explain.
Answer:
Step-by-step explanation:
a. The equation of the line that describes the relationship between distance and time for Car X can be found by using the slope-intercept form: y = mx + b, where m is the slope and b is the y-intercept.
To find the slope (m), we can use the formula: m = (change in y) / (change in x) = (distance traveled) / (time elapsed) = 174 miles / 3 hours = 58 miles per hour.
Since the car starts at time x = 0 and has traveled 174 miles at time x = 3, the y-intercept (b) can be found by setting x = 0 and solving for y: y = 58x + b, and y = 174 when x = 3, so b = 174 - 58(3) = -160.
Putting it all together, we get the equation: y = 58x - 160.
b. The graph that represents the relationship between distance and time for Car X is a line that passes through the point (0, -160) and has a slope of 58. This line represents the linear relationship between the distance traveled and the time elapsed for Car X.
The y-intercept of -160 represents the distance traveled when time is equal to 0. The slope of 58 represents the rate of change of the distance traveled with respect to time. This means that for every hour that passes, Car X travels 58 miles.
Company A is a manufacturing company. It has received a special order for 10,000 units of its product TK-15. The normal selling price of one unit of TK-15 is $68 and its unit product cost is $20 as shown below:
Direct materials $8.00
Direct labor $2.00
Manufacturing overhead $10.00
Unit product cost $20.00
The company's manufacturing overhead cost is mostly fixed. Only 30% of manufacturing overhead varies with the number of units of TK-15 produced. The special order will require customizing the TK-15s for an additional direct materials cost of $6 per unit and an additional direct labor cost of $4 per unit. If SOR-768 accepts the special order, the company will have to lease special equipment at a cost of $80,000 to do the customization. The company has sufficient excess capacity, and the special order would not affect the company's regular production and sales.
What is the minimum (i.e., the break-even) sales price that the company should charge per unit of the customized TK-15 for this special order?
i. $23
ii. $31
iii. $30
iv. $38
The minimum (break-even) sales price that the company should charge per unit of the customized TK-15 for the special order is $30. To determine the break-even sales price per unit for the special order, we need to consider the additional costs incurred for customization and the lease of special equipment.
To determine the break-even sales price per unit for the special order, we need to consider the additional costs incurred for customization and the lease of special equipment.
The unit product cost of TK-15 is $20, which includes direct materials, direct labor, and manufacturing overhead. For the special order, additional direct materials cost of $6 per unit and additional direct labor cost of $4 per unit are required. This brings the total variable cost per unit to $20 + $6 + $4 = $30.
The fixed portion of manufacturing overhead does not change with the special order and is not relevant to the calculation of the break-even sales price.
In addition to the variable cost, the company incurs a lease cost of $80,000 for the special equipment. To determine the number of units needed to cover this cost, we divide the lease cost by the contribution margin per unit ($30 - $20 = $10) to get 8,000 units.
Since the special order is for 10,000 units, the fixed lease cost is covered within this quantity, and any additional units contribute towards covering the fixed manufacturing overhead and generating profit.
Therefore, the minimum (break-even) sales price that the company should charge per unit of the customized TK-15 for this special order is $30 (iii).
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Write the equation of a parabola whose directrix is x=4 and has a focus at (-6,-5).
Write the equation of a parabola whose directrix is y=2 and has a focus at (3,10).
Find the equation for the parabola that has its focus at (-3,2) and has directrix y=6.
Find the equation for the parabola that has its vertex at the origin and has directrix at x=-1/43.
Find an equation for the parabola that has its vertex at the origin and has its focus at the point (0,-6.4).
The equations of the parabolas are: (a) (x + 5)^2 = 8(y + 6) (b) (y - 6)^2 = 4(x - 0)
(c) (y - 0)^2 = 16(x + 1/43) (d) (y + 6.4)^2 = 4y
(a) To find the equation of a parabola with directrix x = 4 and focus at (-6, -5), we can use the formula: (x - h)^2 = 4p(y - k), where (h, k) is the vertex and p is the distance between the vertex and the focus. In this case, the vertex is (-6, -5), and p is the distance from (-6, -5) to the directrix x = 4, which is 10 units. Plugging in the values, we get (x + 6)^2 = 8(y + 5).
(b) For a parabola with directrix y = 2 and focus at (3, 10), we use the formula: (y - k)^2 = 4p(x - h). The vertex is (3, 10), and the distance between the vertex and the directrix y = 2 is 8 units. Plugging in the values, we get (y - 10)^2 = 32(x - 3).
(c) To find the equation for a parabola with focus at (-3, 2) and directrix y = 6, we can use the formula (y - k)^2 = 4p(x - h). The vertex is the midpoint between the focus and the directrix, which is (-3, 4). The distance between the vertex and the focus (or directrix) is the value of p, which is 2 units. Plugging in the values, we get (y - 4)^2 = 16(x + 1/43).
(d) For a parabola with vertex at the origin and focus at (0, -6.4), we can use the formula (x - h)^2 = 4p(y - k). The vertex is (0, 0), and the distance between the vertex and the focus (or directrix) is the value of p, which is 6.4 units. Plugging in the values, we get (y - 0)^2 = 4(6.4)y, which simplifies to y^2 = 4(6.4)y.
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Find the area of the regular hexagon if the radius of a circle inscribed in the hexagon is 10√3
meters.
Answer:
D. 600√3Step-by-step explanation:
Refer to your previous question:
https://brainly.com/question/22624022Radius of the inscribed circle is the apothem of the hexagon.
Apothem (a) and half of the side (s) make a 30-60-90 right triangle.
The ratio of the legs, as per property of 30-60-90 triangle:
s : a = 1 : √3 ⇒ s : 10√3 = 1 : √3 ⇒ s = 10Half the side is s = 10 units, then side of the hexagon is 20 units.
The area of the hexagon:
A = 1/2Pa, P- perimeter, a- apothem A = 1/2(6*20)*(10√3) = 600√3Correct choice is D
Make p the subject of m=3n+2p
Answer:
\(n = \frac{m - 2p}{3} \\ \\ p = \frac{m - 3n}{2} \)
Step-by-step explanation:
\(1. \: m - 2p = 3n \\ 2. \: \frac{m - 2p}{3} \\ 3. \: n = m - 2p \\ \\ 1. \: m - 3n = 2p \\ 2. \: \frac{m - 3n}{2} = p \\ 3. \: p = \frac{m - 3n}{2} \)
The shape of a colony of bacteria on a Petri dish is circular Find the approximate increase in its area if its radius increases from 30 mm to 31 mm. [Recall that the area of a circle is A = ar?) The estimated change in area is mm2. (Round to two decimal places as needed.) ed con ew!
The approximate increase in area, rounded to two decimal places, is: ΔA ≈ 61 × 3.14 ≈ 191.54 mm². The estimated change in area can be calculated using the formula for the area of a circle, A = πr^2.
When the radius increases from 30 mm to 31 mm, the new area can be found as:
A_new = π(31 mm)^2 = 961π mm^2
Similarly, the original area can be found as:
A_old = π(30 mm)^2 = 900π mm^2
The approximate increase in area can be found by subtracting the old area from the new area:
ΔA = A_new - A_old = 961π mm^2 - 900π mm^2 = 61π mm^2
Using a calculator or approximating π to 3.14, we can calculate the approximate increase in area as:
ΔA ≈ 61(3.14) mm^2 ≈ 191.54 mm^2
Therefore, the estimated change in area is approximately 191.54 mm^2.
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Simplify the expression:
-5(1 + 3d)
Submit
Answer:
-5 -15d
Step-by-step explanation:
-5(1 + 3d)
Distribute
-5 *1 + -5*3d
-5 -15d
Answer:
-5 - 15d
Step-by-step explanation:
-5(1 + 3d)
- 5 - 15d
I hope this helped!
You may need to use the appropriate appendix table to answer this question.
Given that z is a standard normal random variable, compute the following probabilities. (Round your answers to four decimal places.)
(a)
P(−1.98 ≤ z ≤ 0.45)
(b)
P(0.52 ≤ z ≤ 1.22)
(c)
P(−1.55 ≤ z ≤ −1.02)
To compute the given probabilities involving the standard normal random variable z, we can use the standard normal distribution table.
What is the probability P(−1.98 ≤ z ≤ 0.45)?To find the probability P(−1.98 ≤ z ≤ 0.45), we need to look up the corresponding values in the standard normal distribution table. The table provides the area under the standard normal curve up to a given z-value.
First, we find the area to the left of z = −1.98 in the table, which is 0.0239. Then, we find the area to the left of z = 0.45, which is 0.6736. To find the desired probability, we subtract the smaller area from the larger one: P(−1.98 ≤ z ≤ 0.45) = 0.6736 - 0.0239 = 0.6497.
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In a ten pin bowling the highest possible score in a single game is 300. At one point in the season, John had an average score of 177. In his next game he obtained a score of 199 which caused his average to increase to 178. After one more game John would like his average to be 183. is it possible for him to accomplish this. If so what score does he need to make his next game if not explain why not.
Answer:
John need to get 293 in his next game to bring his average up to 183.
Step-by-step explanation:
John starts with N games played and averaging 177 points per game.
In game N+1, John scored 199 points.
\(\frac{177N + 199}{N+1}=178\\177N+199=178N+178\\N=21\\\)
So, John has now played (N+1) = 22 games.
We need to know what score John needs in game 23 to bring his average to 183.
\(\frac{177*21 + 199+Y}{23}=183\\3916+Y=4209\\Y=293\\\)
a ______ is a descriptiion of the approach that is used to obtain samples from a population prior to an data collection activity.
A.
population frame
B.
sampling weight
C.
sampling plan
D.
probability interval
The correct answer is option C. A sampling plan refers to a detailed strategy for obtaining a sample from a population for the purpose of data collection.
It describes the precise procedures needed to choose the sample, determine the members of the sample, and gather the data.
The sampling strategy should take into account the type of sampling design, sample size, sampling process, and the methods to be employed for data collecting.
The strategy for implementing sampling should be outlined in the plan, along with instructions on how to make sure the sample is representative of the population, how to prevent bias in the sampling process, and how to make sure the data gathered is of high quality.
A good sampling plan should provide a clear and consistent method for gathering data and be founded on basic statistical concepts.
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