Answer:
The initial value, b = $3.50 is the skate rental fee
The rate of change, 'm' is $3.0 is the hourly rate charged by the roller skating rink
Step-by-step explanation:
From the question we have;
The charges of the roller skating rink = A skate rental fee + An hourly rate
The total cost to skate for 2 hours = $9.50
The total cost to skate for 5 hours = $18.50
The relationship between the total cost of skating and the duration in hours = Linear relationship
Let 'x' represent the number of hours skating and let 'y' represent the total cost, we have;
The form of the equation is y = m·x + b
Where;
m = The rate of change of the linear relationship
b = The initial value (y-intercept)
When x = 2, y = 9.50
Therefore, we can write;
9.50 = 2·m + b...(1)
When x = 5, y = 18.50
Therefore, we can write;
18.50 = 5·m + b...(2)
Subtracting equation (1) from equation (2) gives;
18.50 - 9.50 = 5·m - 2·m + b - b = 3·m
9.0 = 3 × m
∴ m = 9.0/3 = 3.0
The rate of change, m = 3.0
Similarly, we have;
From equation (1), we get;
9.50 = 2·m + b = 2 × 3.0 + b = 6.0 + b
9.50 = 6.0 + b
∴ b = 9.50 - 6.0 = 3.50
The initial value = 3.50
Therefore, the initial value, b = $3.50 is the skate rental fee while rate of change m = $3.0 is the hourly rate the rate.
A new sensor was developed by ABY Inc. that is to be used for their obstacle detection system. During tests involving 250 runs, the following data were acquired:
The alarm went off 33 times even if there is no obstacle.
There are 63 times when the alarm didn't activate even if an obstacle is present.
The alarm went off correctly 62 times.
For the sensor to be commercially produced, it must have an error rate that is lower than 40% and an F-Score that is more than or equal to 70%.
For answers that have decimal places, use four-decimal places.
1. How many times that the alarm didn't activate correctly?
2. How many runs have actual obstacles in place?
3. How often is the sensor correct?
4. How often is the sensor incorrect?
5. What is the hit rate of the sensor?
6. How often does the sensor predict a NO even if it is supposed to be a YES?
7. What is the CSI of the sensor?
8. What is the overall accuracy of the sensor?
9. What is the F-score?
10. Yes or No. Did the sensor pass the expectations?
A new sensor was developed by ABY Inc. that is to be used for their obstacle detection system. However, the sensor to be commercially produced, it must have an error rate that is lower than 40% and an F-Score that is more than or equal to 70%.
1. The alarm didn't activate correctly 63 times during the tests.
During the tests, it was observed that the alarm failed to activate in the presence of an obstacle 63 times. This means that the sensor missed detecting obstacles in those instances.
2. There were 126 runs with actual obstacles in place.
Out of the 250 runs, the alarm correctly activated 62 times and didn't activate correctly 63 times. Since the alarm failed to activate in the presence of an obstacle 63 times, we can infer that there were 126 runs with actual obstacles.
3. The sensor was correct 156 times out of 250 runs.
To calculate how often the sensor was correct, we need to sum up the number of times the alarm went off correctly (62 times) and the number of times the alarm didn't activate correctly (63 times).
This gives us a total of 125 correct activations. However, we also need to account for the 63 times when the alarm didn't activate even if an obstacle was present. So the sensor was correct 125 + 63 = 188 times out of 250 runs.
4. The sensor was incorrect 62 times out of 250 runs.
The sensor was incorrect when it failed to activate the alarm in the presence of an obstacle (63 times) and when the alarm went off even if there was no obstacle (33 times). Therefore, the sensor was incorrect 63 + 33 = 96 times out of 250 runs.
5. The hit rate of the sensor is 0.4960 or 49.60%.
The hit rate, also known as the True Positive Rate or Sensitivity, measures the proportion of actual positive cases that were correctly identified by the sensor.
It is calculated by dividing the number of correct activations (62) by the total number of runs with actual obstacles (126). Therefore, the hit rate is 62/126 = 0.4960 or 49.60%.
6. The sensor predicted a NO even when it was supposed to be a YES 33 times.
Out of the 250 runs, there were 33 instances where the alarm went off even if there was no obstacle present. This means that the sensor predicted a NO (no obstacle) incorrectly in those cases.
7. The CSI (Critical Success Index) of the sensor is 0.4032 or 40.32%.
The CSI, also known as the Threat Score or True Skill Statistic, measures the effectiveness of the sensor in detecting obstacles while avoiding false alarms.
It is calculated by dividing the number of correct activations (62) by the sum of correct activations, missed detections, and false alarms. So the CSI is 62 / (62 + 63 + 33) = 0.4032 or 40.32%.
8. The overall accuracy of the sensor is 62.80%.
The overall accuracy is calculated by dividing the number of correct activations (62) and correct non-activations (187) by the total number of runs (250). So the overall accuracy is (62 + 187) / 250 = 0.6280 or 62.80%.
9. The F-score is 0.5238 or 52.38%.
The F-score, also known as the F1-score, combines the precision and recall of the sensor's performance. It is calculated using the formula: F-score = 2 * (precision * recall) / (precision + recall).
Precision is the ratio of true positives (62) to the sum of true positives and false positives (33), while recall is the ratio of true positives to the sum of true positives and false negatives (63). Plugging in the values, we get F-score = 2 * (62)
To know more about F-score refer here:
https://brainly.com/question/31106364#
#SPJ11
On the last 4 math assignments, Andrew scored the following:
88, 92, 100, 75
What is the median?
Answer:
median is 90
Step-by-step explanation:
75, 88, 92, 100
(88+92)/2 = 90
solve for x round to your nearest tenth
Can you give me the answer to this
Answer:
C. a translation of 1 unit right and 2 units up, followed by a dilation by a factor of 3
Step-by-step explanation:
math a man made pond has the sape of a reverse truncate square pyramid as shown below. the top side length is 20 meters
The man-made pond has the shape of a reverse truncated square pyramid with a top side length of 20 meters.
A reverse truncated square pyramid is a three-dimensional shape that resembles an inverted pyramid. It has a square base and four triangular faces that taper toward a smaller square top. In the case of the man-made pond, the top side length is given as 20 meters.
The specific dimensions and characteristics of the pond, such as the height, the length of the slanted sides, and the volume, are not provided in the question.
However, based on the given information, we can understand the general shape and structure of the pond. It is a geometric figure resembling a reverse truncated square pyramid, with a square base and sloping sides that converge toward a smaller square top.
Learn more about square pyramid here:
https://brainly.com/question/31200424
#SPJ11
what is 10x32 I will give brainliest and thanks
Answer:
320
Step-by-step explanation:
WILL GIVE BRAINLIST!!!
MAD (Mean absolute deviation) is always a negative number
True or False
Find all the values of p for which the series is convergent.
[infinity]
∑ 3 / (n[ln(n)]p
ₙ ₌ ₂
The series ∑ 3 / (n[ln(n)]^p is convergent for all values of p greater than 1.
To determine the values of p for which the series is convergent, we can use the integral test. According to the integral test, if the integral of the series converges, then the series itself converges.
Considering the series ∑ 3 / (n[ln(n)]^p, we can evaluate its convergence by integrating the series function. Integrating 3 / (n[ln(n)]^p with respect to n gives us ∫ (3 / (n[ln(n)]^p)) dn.By performing the integration, we obtain ∫ (3 / (n[ln(n)]^p)) dn = 3 ∫ (1 / (n[ln(n)]^p)) dn.
Simplifying further, we have 3 ∫ (1 / (n^1 * [ln(n)]^p)) dn = 3 ∫ (1 / (n^1 * n^p * [ln(n)]^p)) dn.
Now, we can observe that the integral is dependent on the value of p. For the integral to converge, the exponent of n^p must be greater than 1.
Therefore, we conclude that the series is convergent for all values of p greater than 1.
Learn more about convergent here
https://brainly.com/question/29258536
#SPJ11
Convert 5.7×108 to its expanded form. sorry guys im not good with math so i need halp ^_^
The answer is 615.6.If you have more problems like this go to math-way calculator
Tammy needs at least an 85% in order to pass
her chemistry class.
no link just put the answerrrrr
Answer:
4in
Step-by-step explanation:
How deep is the water 31.5 feet from the shore? 05
(10 Points)
Answer:
This is impossible to answer, unless there is a picture that is not there.
Step-by-step explanation:
Can you help me pleaseeeeeeeeeee
Answer:
Pounds of candy Cost ($) Cost/pound
1 $3 $3/1
3 $9 $3/1
7 $21 $3/1
10 $30 $3/1
√3 • TV TV² (4) Let's evaluate x² + y² - 1 dy dr by converting it to polar coordinates.
To evaluate the expression x² + y² - 1 in polar coordinates, we need to convert the Cartesian coordinates (x, y) to polar coordinates (r, θ).
In polar coordinates, x = rcos(θ) and y = rsin(θ). Substituting these values into the expression, we obtain r²cos²(θ) + r²sin²(θ) - 1. This expression can be simplified using trigonometric identities to obtain r²(cos²(θ) + sin²(θ)) - 1, which simplifies further to r² - 1.
When converting Cartesian coordinates (x, y) to polar coordinates (r, θ), we use the equations x = rcos(θ) and y = rsin(θ). Substituting these values into the expression x² + y² - 1, we have (rcos(θ))² + (rsin(θ))² - 1. Applying the trigonometric identity cos²(θ) + sin²(θ) = 1, we can simplify the expression to r²cos²(θ) + r²sin²(θ) - 1.
Since cos²(θ) + sin²(θ) = 1, the expression simplifies further to r²(1) - 1, which becomes r² - 1. Therefore, in polar coordinates, the expression x² + y² - 1 is equivalent to r² - 1. This means that when evaluating the expression in terms of polar coordinates, we only need to consider the square of the radial distance, r², and subtract 1.
Learn more about Cartesian coordinates here:
https://brainly.com/question/31327924
#SPJ11
NO LINKS PLEASE JUST THE ANSWER TEHEHHE THANKSSSS :))))
A square and rectangle are shown below. The width of the rectangle is the same as the length of a side of the square, both represented by x. The length of the rectangle is one foot more than twice its width. The perimeter of the rectangle is 26 feet more than that of the square.
A). Write an expression for the length of the rectangle in terms of x. Label the drawing
B). Show that 5 could not be the value of x
C). Set up an equation and solve it to find the value of x
THANKS FOR THE HELP!!!
Answer:
Since this is a multi-part question, just look at the bolded parts under each letter. I hope this helps a bit ;)
Step-by-step explanation:
A)
All sides of a square are congruent. "s" represents the square's perimeter:
s=4x.
"r" is the rectangle's perimeter:
r= 4x+26
since the perimeter = 2W + 2L:
2W + 2L= 4x+ 26
and W=x, so:
2x + 2L= 4x + 26
Subtract from both sides:
2L= 2x +26
Divide both sides:
the length of the rectangle "L"= x +13.
B) Plug 5 into the equations:
L= 5+ 13 or 18.
2(18) + 2(5)= r
36+ 10 = r or 46
s= s+ 26
s= 46-26 or 20.
20/4= 5...
It seems (at least to me, feel free to give constructive criticism) that the only logical conclusion is that 5 could be the value of x.
C) You would likely need to use substitution to solve, but unless I am much mistaken, this looks like an infinite-solutions equation.
L=w+13
please help ASAP!!!!!!!
Answer: the length of the base is 50 cm
Step-by-step explanation:
An example of the classical approach to probability would be_____
A. in terms of the proportion of times an event is observed to occur B. in a very large number in terms of the degree to which one happens to believe that an event will happen C. in terms of the proportion of times that an event can be theoretically expected to occur D. in terms of the outcome of the sample space being equally probable
Option C is the correct example of the classical approach to probability.
An example of the classical approach to probability would be option C: in terms of the proportion of times that an event can be theoretically expected to occur.
The classical approach to probability is based on the assumption of equally likely outcomes. In this approach, the probability of an event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
For example, consider a fair six-sided die. The classical approach would state that since there are six equally likely outcomes (the numbers 1 to 6), the probability of rolling a specific number, say 3, would be 1 out of 6, or 1/6. This is because there is only one favorable outcome (rolling a 3) out of six possible outcomes (rolling any number from 1 to 6).
Similarly, if we have a bag containing 10 red balls and 20 blue balls, the classical approach would state that the probability of drawing a red ball would be 10 out of 30, or 1/3. This is because there are 10 favorable outcomes (drawing a red ball) out of 30 possible outcomes (drawing any ball from the bag).
In both cases, the classical approach to probability relies on the concept of equally likely outcomes and uses the proportion of favorable outcomes to calculate the probability.
Therefore, option C is the correct example of the classical approach to probability.
For more questions on probability
https://brainly.com/question/251701
#SPJ8
Khan khan khan khan
Answer:
11
Step-by-step explanation:
it says motor cycles combined with garbage so add both of them then subtract that from the bull dosers
motor =18
garbage=4
18+4=22
bulldosers=11
22-11= 11 more
Answer:
11
Step-by-step explanation:
(a) A vector equation of the plane P1 in R3 which passes through the points A = (2, 1, –4), B= = (3, 4, –4), and C = (3, -9,8) is 2 1 1 X = HOHE ) -4 12 Correct answer, well done. Correct answer,
The vector equation of the plane P1 in R3 which passes through the given points is: `(-36, -12, -9).(X - (2, 1, -4)) = 0`.
We have three points `A (2, 1, -4), B (3, 4, -4)` and `C (3, -9, 8)` that lie on plane P1. To find the vector equation of the plane P1 in R3, we need to find the normal vector of the plane P1. The normal vector is perpendicular to the plane P1. We can find the normal vector by taking the cross product of any two nonparallel vectors that lie on the plane P1.
Let's choose two vectors `AB` and `AC`.
`AB = B - A = (3, 4, -4) - (2, 1, -4) = (1, 3, 0)`
`AC = C - A = (3, -9, 8) - (2, 1, -4) = (1, -10, 12)`
Now, we take the cross product of `AB` and `AC` to get the normal vector `n`.
`n = AB × AC = (-36, -12, -9)`
The equation of the plane P1 with normal vector `n` and passing through the point A can be written as:
`(n . (X - A)) = 0` where `.` is the dot product.
Substituting the values, we get:
`(-36, -12, -9) . (X - (2, 1, -4)) = 0`
`(-36, -12, -9) . (X - 2, X - 1, X + 4) = 0`
`-36(X - 2) - 12(X - 1) - 9(X + 4) = 0`
`-36X + 72 - 12X + 12 - 9X - 36 = 0`
`-57X + 48 = 0`
`57X = 48`
`X = 48/57 = 16/19`
Therefore, the vector equation of the plane P1 in R3 which passes through the points A = (2, 1, –4), B= = (3, 4, –4), and C = (3, -9,8) is:
`(-36, -12, -9) . (X - 2, X - 1, X + 4) = 0`
`-36(X - 2) - 12(X - 1) - 9(X + 4) = 0`
`-36X + 72 - 12X + 12 - 9X - 36 = 0`
`-57X + 48 = 0`
`57X = 48`
`X = 16/19`
The answer is, `(-36, -12, -9).(X - (2, 1, -4)) = 0`.
To know more about vector equation refer here:
https://brainly.com/question/31044363
#SPJ11
Martin drew a triangle. Its sides were
3
cm
3 cm3, start text, space, c, m, end text,
4
cm
4 cm4, start text, space, c, m, end text, and
5
cm
5 cm5, start text, space, c, m, end text.
It has one right angle and two acute angles.
Answer:
It is a right triangle
Step-by-step explanation:
Complete question
Martin drew a triangle. Its sides were 3\text{ cm}3 cm3, start text, space, c, m, end text, 4\text{ cm}4 cm4, start text, space, c, m, end text, and 5\text{ cm}5 cm5, start text, space, c, m, end text. It has one right angle and two acute angles. Complete the sentence to describe the triangle Martin drew. Martin's triangle is ----- and ------ .
First you must know that for a triangle to be right angled, the square of the largest side must be equal to the sum of the square of the other two sides
Given
Largest side c = 5
Other sides a = 3 and b=4
Square of largest side c² =5²=25
Sun of the squares of other two sides = a²+b²
Sum of the squares of other two sides =3²+4²
Sum of the squares of other two sides = 9+16 =25
Since c² =a²+b² according to pythagoras theorem, hence the triangle is right angled
It is 1/2 mile from the students home to a store and back. In a week, she walked to the store and back home 1 time. In the same week, she rode her bike to the store and back 3 times. How many miles did she walk and ride to the store and back in that week?
Answer:
2
Step-by-step explanation:
So you will get the 1/2 and see how many times she does go back and forth and she did it 4 times so you would multiply 1/2 x 4 and get a total of 2
Hope It Helps
Answer:
2
Step-by-step explanation:
she walked to the store and back 1 time=1/2 mile :
from her house to the store=1/4 mile
she rode her bike to the store and back 3 times
So in total that week she went to the store and back 4 times
so 4 times 1/2 is 2
Determine if Q[x]/(x2 - 4x + 3) is a field. Explain your answer.
The quotient ring [tex]Q[x]/(x^2 - 4x + 3)[/tex] is not a field because the polynomial x²- 4x + 3 can be factored into linear factors in Q[x], indicating the presence of zero divisors in the quotient ring.
To determine if the quotient ring [tex]Q[x]/(x^2 - 4x + 3)[/tex] is a field, we need to check if the polynomial x² - 4x + 3 is irreducible in Q[x], which means it cannot be factored into non-constant polynomials of lower degree in Q[x].
The polynomial x² - 4x + 3 can be factored as (x - 1)(x - 3) in Q[x], so it is not irreducible. This means that Q[x]/(x² - 4x + 3) is not a field.
In fact, Q[x]/(x² - 4x + 3) is an example of a quotient ring that is not a field. It can be shown that this quotient ring is isomorphic to Q[x]/(x - 1) x Q[x]/(x - 3), which is a direct product of two fields.
Since a field cannot have nontrivial zero divisors, and in this case, both (x - 1) and (x - 3) are zero divisors, the quotient ring is not a field.
To know more about quotient ring refer here:
https://brainly.com/question/32556645#
#SPJ11
median for 15,17,15,16,14,18,5
Answer:
the median is 15
Explanation:
you can find the median by arranging the numbers from smallest to largest and finding the number in the middle.
5 14 15 15 16 17 18
in this case, the number in the middle is 15 so the median for this data set is 15.
i hope this helps! :D
Can y’all help me with this one?
-44+18=-26degrees
negative 26 degrees is your answer
please mark brainliest and have a nice day
I need help!!!
Find∠KML
Answer:
62
Step-by-step explanation:
180 - 56 = 124
124/2 = 62
Give an example of a single polygon that has at least 5 sides and has exactly 2 lines of symmetry,
One example of a single polygon that has at least 5 sides and has exactly 2 lines of symmetry is a regular pentagon.
A regular pentagon is a five-sided polygon in which all five sides are equal in length and all five angles are congruent, i.e., the same measure. A regular pentagon also has five lines of symmetry, which cut through its center point and the midpoint of each side.
However, we need a polygon with exactly 2 lines of symmetry. Therefore, we can take a regular pentagon and remove two opposite edges and vertices. This leaves us with a polygon that still has 5 sides but has exactly 2 lines of symmetry: the red lines represent the two lines of symmetry of the polygon.
To know more about pentagon refer to:
https://brainly.com/question/30242660
#SPJ11
Use the formula to find the simple interest:
$34,100 at 4% for 3 years
Answer:
$4092
Step-by-step explanation:
what is the scale factor of figure b to a
Answer:
C. 2:5
Step-by-step explanation:
Find perimeter of each...
a. 10+25+21.5=56.5
b. 4+10+8.6=22.6
b:a
22.6:56.6
simplify
11.3 will go into both for..
2:5
Chester plays football at East Washington
Junior High School. In one quarter of
Friday's game, Chester ran +15 yards,
-23 yards, +34 yards, +17 yards, and
-28 yards. How many yards is Chester
from his starting point?
Answer:
15 yards
Step-by-step explanation:
hope this helps ❤️
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Answer: D
Step-by-step explanation:
maybe
Answer:
the answer for your question is d