Answer:
57.33
Step-by-step explanation:
50+28+3x=180
78+3x=180-78
3x=172/3
x = 57.33
Suppose we are conducting a X^2 goodness-of-fit test for a nominal variable with 4 categories. The test statistic X^2 = 6.432 and α = .05. The critical value is _______ - So we _____ the null hypothesis.
The critical value for the [tex]X^{2}[/tex] goodness-of-fit test with 4 categories and α = 0.05 is approximately 7.815.
In a chi-square goodness-of-fit test, we compare the observed frequencies of a nominal variable across different categories with the expected frequencies under the null hypothesis. The test statistic, [tex]X^{2}[/tex], measures the discrepancy between the observed and expected frequencies.
To determine if the observed frequencies significantly differ from the expected frequencies, we compare the test statistic with the critical value at the specified significance level (α). The critical value is determined based on the degrees of freedom, which is the number of categories minus 1.
In this scenario, the nominal variable has 4 categories. Degrees of freedom is (4 - 1) = 3. Using the degrees of freedom and the significance level of α = 0.05, we can consult the chi-square distribution table or use statistical software to find the critical value.
The critical value for the [tex]X^{2}[/tex] goodness-of-fit test with 4 categories and α = 0.05 is approximately 7.815.
Since the test statistic [tex]X^{2}[/tex] = 6.432 is less than the critical value of 7.815, we fail to reject the null hypothesis. This means that there is not enough evidence to suggest a significant difference between the observed and expected frequencies.
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A girl is putting jars of jam into boxes.She puts 8 jars into each box,and she has a total of 144 jars.She wants to know how many boxes she needs how much boxes does she need
Answer:
18
Step-by-step explanation:
she needs 18 boxes divide 144 by 8 then u get ur answer
Let A = {10, 12, 13, 14, 15} and B = {10,20, 21, 30, 40}. Find a set of largest possible size that is a subset of both A and B.
The set has a size of 1, which is the largest possible size for a subset that is common to A and B.
To find a set of largest possible size that is a subset of both A and B, we need to find the common elements of A and B.
The common element of A and B is 10. Therefore, any subset of A and B that is of largest possible size must include 10.
One possible set of largest possible size that is a subset of both A and B is:
{10}
This set has a size of 1, which is the largest possible size for a subset that is common to A and B.
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A line has an undefined slope and includes the point (-10, 6) and (q, 0) what is the value q
Answer:
q = -10
Step-by-step explanation:
If the slope is undefined, then there is no change in x. Therefore, since -10-(-10) = 0, then q=-10.
Ms. Reynolds is asking students to find
the volume of the rectangular pyramid
below. Which student wrote the
correct expression for the value of B,
the area of the base ?
Peter: 5•13
Thelma: 1/3 (13•12)
A tangent-tangent angle intercepts two arcs that measure 124 degrees and 236 degrees what is the measure of the tangent-tangent angle
Answer:
It can be calculated by finding the difference between the two angles. Half of this difference will be the angle that is required.
Therefore
236 - 124 = 112
Tanget-tanget angle = 112 / 2 = 56 degrees
Find a unit vector normal to the fuxface at Point P: (1,1,2): 0.25 4- X - Y = 0 Z a) Ô = ? ń - - b) Vf-? C) vxof-?
(a) The unit vector normal to the surface at point P is n = (-2/3, -2/3, 1/3).
(b) The gradient vector ∇f = (-2x, -2y, 0.5z).
(c) The curl of the gradient vector, ∇ × ∇f, is not applicable in this case since ∇f is not a vector field, but a surface normal.
To find a unit vector normal to the surface at point P(1, 1, 2) given the equation 0.25z² - x² - y² = 0, we can follow these steps:
Step 1: Define the Surface Function
Let's define the surface function f(x, y, z) based on the given equation:
f(x, y, z) = 0.25z² - x² - y²
Step 2: Calculate the Gradient Vector (∇f)
The gradient vector (∇f) represents the vector of partial derivatives of the surface function. Calculate ∇f(x, y, z) by taking the partial derivatives of f(x, y, z) with respect to each variable:
∂f/∂x = -2x
∂f/∂y = -2y
∂f/∂z = 0.5z
Thus, the gradient vector (∇f) is (∇f) = (-2x, -2y, 0.5z).
Step 3: Evaluate ∇f at Point P
Evaluate the gradient vector (∇f) at point P(1, 1, 2) by substituting the coordinates into (∇f):
∇f(P) = (-2(1), -2(1), 0.5(2))
= (-2, -2, 1)
Step 4: Normalize the Normal Vector
To obtain a unit vector normal to the surface at point P, we need to normalize (∇f(P)) by dividing it by its magnitude.
Magnitude of ∇f(P) = √((-2)² + (-2)² + 1²)
= √(4 + 4 + 1)
= √9
= 3
The unit vector normal to the surface at point P is then:
n = (∇f(P)) / |∇f(P)|
= (-2, -2, 1) / 3
= (-2/3, -2/3, 1/3)
So, the unit vector normal to the surface at point P(1, 1, 2) is n = (-2/3, -2/3, 1/3).
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The question is -
Find a unit vector normal to the surface at Point P: (1,1,2):
0.25z² - x² - y² = 0
(a) n = ?
(b) ∇f = ?
(c) ∇ × ∇f = ?
Match the following ratios to what they describe.
Description
The ratio of students who wish they had x-ray
vision to all students
The ratio of students who wish for flight to all
students
The ratio of students who wish for flight to
those who wish for invisibility
Ratio
2:9
2:3
1:6
The ratio of students who wish they had x-ray vision to all students: 2:9
The ratio of students who wish for flight to all students: 3:1
The ratio of students who wish for flight to those who wish for invisibility: 6:1
How to Match the ratios to what they describe.1. The ratio of students who wish they had x-ray vision to all students: 2:9
This means that out of a group of students, there are 2 students who wish they had x-ray vision for every 9 students in total.
2. The ratio of students who wish for flight to all students: 2:3
This ratio indicates that out of a group of students, there are 2 students who wish for the ability to fly for every 3 students in total.
3. The ratio of students who wish for flight to those who wish for invisibility: 1:6
This ratio compares the number of students who wish for flight to the number of students who wish for invisibility. It states that for every student who wishes for flight, there are 6 students who wish for invisibility.
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which of the following equations has no solution?
Answer:
-2x^2 + 2x + 1
Step-by-step explanation: If you try to factorize, there are no solutions, and if you use the quadratic formula, you don't get 2 solution for x
Find the measure of each labeled angle A(3x-20) B(2x) C (2x-15)
Answer:
Measure of angle A = 100°
Measure of angle B = 80°
Measure of angle C = 65°
Step-by-step explanation:
From the given picture,
Angle A and angle B are the linear pair of angles, and linear pair of angles are supplementary angles,
m(∠A) + m(∠B) = 180°
(3x - 20)° + (2x)° = 180°
5x - 20 = 180
5x = 200
x = 40
By substituting the value of x in the measures of each angle,
m(∠A) = (3x - 20)°
= 3(40) - 20
= 120 - 20
= 100°
m(∠B) = 2x°
= 2(40)
= 80°
m(∠C) = (2x - 15)°
= 2(40) - 15
= 80 - 15
= 65°
i need help please and thank you i will give a brainliest for the correct answers so it’s more than once it say select all that apply
Answer:
I would say C or B
Step-by-step explanation:
⚠ warning, there are multiple bots that spam links, that are usually written in a link shortening form (eg, c u t . l y , b i t . l y) do NOT click on those links, as they usually contain trojan viruses, and/or adult content. please copy + paste this message so other users can be aware and stop these bots. thank you, and be safe! :) #waronbitlybots
Alexa is saving to buy a new bike that costs $265. So far she has saved $45. If she is able to save $11 each week, how many weeks will it take her to save enough to buy her coveted bike? Kole wrote (265 - 45)/11 = w. Bella wrote 11w + 45 = 265. Who do you agree with? Justify your response.
Answer: Bella is correct.
Step-by-step explanation:
Let the number of weeks will it take her to save enough to buy her coveted bike be represented by w.
The information given in the question can then be formed into an equation as:
45 + 11(w) = 265
45 + 11w = 265
Collect like terms
11w = 265 - 45
11w = 220
w = 220/11
w = 20
He'll save for 20 weeks
Bella is correct.
im totataly lost:( (needs help)
Answer:
B)All the real numbers
Step-by-step explanation:
the given Graph is Parabola
so the function has to be quadratic
we know that the domain of a quadratic function is always [tex]x\in\mathbb{R}[/tex]
hence, our answer is B
PLEASE HELP ASAP!!! WILL MAKE BRAINLIEST!
Answer: Figure B is 2x bigger on all sides
Explanation: You can see that each of the numbers times 2 would equal all of the numbers on B.
e/m = 3.125x10^6 V/r^2I^2
From the equation (above) in lab instruction, derive the formula of error propagation required in experiment step 8 8. Change the voltage to 400V for the third data set. Estimate the instrument uncertainty in V, I, & r. Use the last digit place read from the power supplies as the uncertainties V and I. Uncertainty in r should be estimated from the thickness of the beam path. Using error propagation, calculate the instrument uncertainty in e/m for each data point.
The instrument uncertainty in e/m for each data point is calculated using error propagation.
e/m = 3.125x10^6 V/r^2I^2
From the given equation above, the formula for error propagation required in experiment step 8 can be derived. The error propagation formula is given as;Δe/m = (e/m)(ΔV/V + 2Δr/r + 2ΔI/I)
The voltage is changed to 400 V for the third dataset. The instrument uncertainties in V, I, and r are to be estimated.
The last digit place read from the power supplies is used as the uncertainties V and I. The uncertainty in r should be estimated from the thickness of the beam path.
Estimation of instrument uncertainties in V, I, and r:For V, the reading is up to 0.1 V.
Hence, the uncertainty in V isΔV = 0.1 VFor I, the reading is up to 0.01 A.
Hence, the uncertainty in I isΔI = 0.01 AFor r, the thickness of the beam path is given as 0.25 cm. Hence, the uncertainty in r isΔr = 0.25 cm
The instrument uncertainty in e/m for each data point is to be calculated using error propagation.
Data for three datasets are given below;
Data Set 1: V = 200 V, r = 0.56 cm, I = 0.2 AData Set 2: V = 300 V, r = 0.56 cm, I = 0.2 AData Set 3: V = 400 V, r = 0.56 cm, I = 0.2 A
For Data Set 1;e/m = 3.125 x 106 × 200/ (0.56)2 (0.2)2= 1.75867 × 1011 C/kgΔe/m = (1.75867 × 1011)(0.1/200 + 2(0.25/0.56) + 2(0.01/0.2))= 1.78853 × 1010 C/kg
For Data Set 2;e/m = 3.125 x 106 × 300/ (0.56)2 (0.2)2= 2.63800 × 1011 C/kgΔe/m = (2.63800 × 1011)(0.1/300 + 2(0.25/0.56) + 2(0.01/0.2))= 1.70314 × 1010 C/kg
For Data Set 3;e/m = 3.125 x 106 × 400/ (0.56)2 (0.2)2= 3.51733 × 1011 C/kgΔe/m = (3.51733 × 1011)(0.1/400 + 2(0.25/0.56) + 2(0.01/0.2))= 1.61057 × 1010 C/kg
Hence, the instrument uncertainty in e/m for each data point is calculated as;
For Data Set 1, Δe/m = 1.78853 × 1010 C/kg
For Data Set 2, Δe/m = 1.70314 × 1010 C/kg
For Data Set 3, Δe/m = 1.61057 × 1010 C/kg
Therefore, the instrument uncertainty in e/m for each data point is calculated using error propagation.
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Which of the following tests can be used to assess whether variances are equal between multiple groups? Welch's test Shapiro-Wilk test Goodness of Fit test Levene test 26 10 points Cancer patients were treated with a new cell-based therapeutic to aid in reducing tumor size. The data table below shows the patients' adverse reactions to this treatment: Weak reaction Strong reaction Male patients Medium reaction 203 110 213 138 182 Female patients 154 Is the sex (male or female) of the patient linked to the severity of the adverse reaction that is observed? Show your work and explain your logic below. Bold or circle your final answer. 0000 The correlation coefficient (r) is used for linear, exponential, and logarithmic relationships. True False
The test that can be used to assess whether variances are equal between multiple groups is the Levene test.
The Levene test is a hypothesis test for the equality of variances in a statistical population. It is named after the American statistician Howard Levene. It is commonly used to check the null hypothesis of homoscedasticity or equal variances across k groups. The test is used to determine if two or more groups have different variances or if the variance is unequal. The null hypothesis of the Levene test is that the variance of the populations from which the groups are drawn is equal. The Levene test is an alternative to the F-test for equal variances. Therefore, it can be concluded that the Levene test can be used to assess whether variances are equal between multiple groups.
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Si restamos 10 unidades al cuadrado de un número, el resultado coincide con el triple de dicho numero. ¿Cual es el numero busado?
Answer:
The value of x is 5 that represents the searched number
Step-by-step explanation:
Let us assume x be the number [^ 2] i.e. squared.
Now
x^2 -10 = 3x
This is a quadratic equation
x^ 2 - 3x - 10 = 0
x^2 - 5x + 2x - 10
x (x - 5) + 2(x - 5)
(x-5) (x + 2) = 0
x - 5 = 0 where x = 5 positive.
x + 2 = 0 where x = -2 negative.
Here we considered the positive
The value of x is 5 that represents the searched number
Please help me with this question
Answer:
c is your answer
Step-by-step explanation:
Please please help me it would mean a lot. Find the area
A state of Maine drivers license has a unique ID for each individual that is 7 digits.
How many possible ID's are available in Maine?
Which expression can be used to calculate the area of a circle?
Pi times diameter
2 times pi times radius
Pi times diameter times diameter
Pi times radius times radius
help plz
Can someone help me with this. Will Mark brainliest. Need answer and explanation/work. Thank you.
Answer:
tangent x = 12/9
Step-by-step explanation:
Hello There!
Once again these are the Trigonometric Ratios
SOH CAH TOA
Sine = Opposite over Hypotenuse (SOH)
Cosine = Adjacent over Hypotenuse (CAH)
Tan = Opposite over Adjacent (TOA)
And for this one we are asked to find the tangent of angle x
Remember tangent = opposite over adjacent
opposite - the side length that is opposite of the angle (so the angle will be facing that side length)
adjacent - the side length that is not the opposite nor the hypotenuse
The opposite of angle x is 12 and the adjacent of angle x is 9
so tangent x = 12/9
the circumference is about ___ m
use 3.14 for pi.
The circumference is:
14.6 x 3.14 = 45.844 (m)
Answer:
c = 45.8 m
Step-by-step explanation:
The diameter of this circle is 14.6 m. The formula for the circumference of a circle of diameter d is πd. Here, using 3.14 for π, C = (3.14)(14.6 m), or
C = 45.8 m
PLZ HELP Siri is grocery shopping. She is buying macaroni. One box is 6 inches long, 1 inch wide, and 9 inches tall. The second box is 3 inches long, 3 inches wide and 6 inches tall. Which box holds more macaroni?
Answer:
The second box
Step-by-step explanation:
The volume of a pyramid can be given by the formula: V=31Ah. Where. A: Area of the V=(1/3)(B)(h)
multiply both sides by 3
3V=Bh
divide both sides by B
3V/B=h
Therefore, If it is wider it has more space to carry more items such as macaroni.
CAN SOMEBODY HELP ME PLEASE
Three cylinders have a height of 8cm. Cylinder 1 has a radius of 1cm. Cylinder 2 has a radius of 2cm. Cylinder 3 has a radius of 3cm. Find the volume of each cylinder.
Answer:
Volume of Cylinder 1 = π×r×r×h
= 22÷7×1×1×8
= 25.13cm
Volume of Cylinder 1 = π×r×r×h
= 22÷7×2×2×8
= 100.53cm
Volume of Cylinder 1 = π×r×r×h
= 22÷7×3×3×8
= 226.19cm
Charlotte bought 18 songs for her MP3 player. Three-thirds of the songs are classical songs. How many of the songs are classical songs?
Answer:
three thirds is one whole
Step-by-step explanation:
The answer is 18 because three thirds is one whole which in this case is 18! Have a nice day!
please solve for x!!!!
Answer:
-14
Step-by-step explanation:
Hello,
Let's have a look at this figure and think about how are these two angles related to each other. These two angles are vertically opposite angles, and any two vertically opposite angles should be equal to each other.
Because the two angles should be equal to each other, we can equate the two equations together and solve for x.
9x + 184 = 7x + 156
9x - 7x = 156 - 184
2x = -28
x = -14
Sebastián afirma que – 14 está a la izquierda de – 10 en la recta numérica y por lo tanto es mayor, mientras que Alfredo afirma que es menor. ¿Quién está en lo correcto? Justifica.
Answer:
Alfredo está en lo correcto porque los números negativos se encuentran a la izquierda del cero y mientras más a la izquierda se encuentra un número negativo, más pequeño será y a medida que te desplazas hacia la derecha mayor será el número. Puedes representar los dos números en una recta numérica de la siguiente forma:
___________________________________________________________
-14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3
Como se ve aquí, -14 se encuentra a la izquierda de -10 y esto significa que es menor. Por esto, Alfredo está en lo correcto al decir que -14 es menor.
Which of the following is caused by the contraction of the diaphragm?
a)Exhalation
b)Relaxation of the rib muscles
c)Downward movement of the rib cage
d)Increase in volume of the chest cavity
Correct answer is option 'D'. Can you explain this answer?
The contraction of the diaphragm causes an increase in the volume of the chest cavity, leading to the correct answer, option 'D'.
The diaphragm is a dome-shaped muscle located at the bottom of the chest cavity. When it contracts, it flattens and moves downward. This contraction of the diaphragm plays a crucial role in the process of inhalation or inspiration.
During inhalation, the diaphragm contracts, which causes it to move downward. This downward movement creates more space in the chest cavity, leading to an increase in its volume. As a result, the lungs expand, and air rushes in from the external environment to fill this increased space. This process allows oxygen to be drawn into the lungs for respiration.
Therefore, option 'D' is the correct answer because the contraction of the diaphragm causes an increase in the volume of the chest cavity, facilitating inhalation or inspiration.
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