Answer:
A.
Step-by-step explanation:
Rise over Run
is rap music more popular among young blacks than among young whites? a sample survey compared 634 randomly chosen blacks aged 15 to 25 with 567 randomly selected whites in the same age group. it found that
Answer:
Step-by-step explanation:
Rap music is generally more popular with young blacks than young whites, during the 80s-90s when rap was becoming more popular with artists such as 2pac, BIG, Dr. Dre, etc they were more popular among young blacks than whites
given c is the midpoint of BD AC BD prove BAC ≈ DAC
Answer:
Step-by-step explanation:
1. C is mid-point of BD and AC is perpendicular to BD
Reason: Given
2. BC = DC
Reason: C is mid-point of BD
3. <ACB and <ACD are right angles
Reason: AC is perpendicular to BD
4. <ACB = <ACD
Reason: both are right angles
5. AC = AC
Reason: reflexive property
6. Δ ACB ≡ Δ ACD
Reason: SAS
the amount spent on textbooks for the fall term was recorded for a sample of five university students - $400, $350, $600, $525, and $450. calculate the value of the sample mean for the data. $450 $400 $600 $465
The value of sample mean for the data is \(\$99.37\)
\(\text{Sample Mean} = \frac{400-350+600+525+450}{5} = \frac{2325}{5} = 465\)
Standard Deviation,
\(S = \sqrt{\frac{1}{n-1} \sum(x - x^-)^2}\)
\(= \sqrt{\frac{1}{5-1} \left[(400-465)^2 + (350-465)^2 + (600-465)^2 + (525-465)^2 + (450-465)^2\right]}\)
\(= \sqrt{\frac{1}{4} (4225+13225+18225+3600+225)}\)
\(= \sqrt{\frac{39500}{4}} = \sqrt{9875} = 99.37\)
\(\therefore x^- = \$465 \text{ and } S = \$99.37\)
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help me youll get brainlyist if right pls help
Answer:
The 2nd one.
(2nd one on the top, to the right of YOUR screen)
As the project progresses, the actual finish times (AFs) of completed activities will determine
the earliest start and earliest finish times for the remaining activities in the network diagram, as well as the total slack.
As the project progresses, the actual finish times (AFs) of completed activities play a crucial role in determining various aspects of the project schedule.
The AFs are used to calculate the earliest start and earliest finish times for the remaining activities in the network diagram. These calculations are based on the dependencies between activities and the actual durations of completed activities.
By considering the AFs, the project team can determine the earliest possible start and finish times for the remaining activities, taking into account the sequence of activities and any imposed constraints. This information helps in managing the project schedule and identifying any potential delays or critical paths.
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Approximation methods for differential equations can be used to estimate definite integrals: (a) Show that y(t) = ᵗ∫₀ e⁻ᵘ² du satisfies the initial value problem dy/dt = e⁻ᵗ², y(0) = 0.
(b) Use the Euler Method (eu1) with h = 1/2 to approximate the integral ²∫₀ e⁻ᵘ² du
(a) To show that y(t) = ᵗ∫₀ e⁻ᵘ² du satisfies the initial value problem dy/dt = e⁻ᵗ², y(0) = 0, we differentiate y(t) with respect to t and substitute the given differential equation and initial condition.
(b) To approximate the integral ²∫₀ e⁻ᵘ² du using the Euler Method with h = 1/2, we divide the interval [0, 2] into subintervals of width h and approximate the integral using the formula: ∑[f(u(i))*h], where f(u(i)) represents the function evaluated at each subinterval.
(a) To show that y(t) = ᵗ∫₀ e⁻ᵘ² du satisfies the initial value problem dy/dt = e⁻ᵗ², y(0) = 0, we first differentiate y(t) with respect to t. Using the Fundamental Theorem of Calculus, we have:
dy/dt = d/dt [ᵗ∫₀ e⁻ᵘ² du]
Applying the Leibniz rule for differentiating under the integral sign, we obtain:
dy/dt = ∫₀ e⁻ᵘ² du
Now we substitute the given differential equation dy/dt = e⁻ᵗ² and the initial condition y(0) = 0:
e⁻ᵘ² = e⁻ᵗ²
Since e⁻ᵘ² and e⁻ᵗ² are equal, the given function y(t) = ᵗ∫₀ e⁻ᵘ² du satisfies the initial value problem.
(b) To approximate the integral ²∫₀ e⁻ᵘ² du using the Euler Method with h = 1/2, we first divide the interval [0, 2] into subintervals of width h = 1/2. In this case, we will have four subintervals: [0, 1/2], [1/2, 1], [1, 3/2], and [3/2, 2].
Using the Euler Method, we approximate the integral within each subinterval by evaluating the function e⁻ᵘ² at the left endpoint of the subinterval and multiplying it by the width of the subinterval. Then, we sum up these approximations for all subintervals.
For example, in the first subinterval [0, 1/2], the approximation would be:
Approximation for
[0, 1/2] = e⁻⁰² * (1/2) = (1/2)
Similarly, we can calculate the approximations for the other subintervals:
Approximation for
[1/2, 1] = e⁻¹/₂² * (1/2) ≈ (0.60653/2)
Approximation for
[1, 3/2] = e⁻¹² * (1/2) ≈ (0.13534/2)
Approximation for
[3/2, 2] = e⁻³/₂² * (1/2) ≈ (0.18394/2)
Finally, we sum up these approximations:
Approximation for
²∫₀ e⁻ᵘ² du ≈ (1/2) + (0.60653/2) + (0.13534/2) + (0.18394/2)
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The trapezoid below has an area of 1,575 cm2.
pg616510
Which equation could you solve to find the height of the trapezoid?
A
850.5h = 1,575
B
1,701h = 1,575
C
45h = 1,575
D
90h = 1,575
The equation to solve the height of the trapezoid is 45h = 1,575
Given data ,
Let the area of the trapezoid be A
Now , the value of A = 1,575 cm²
And , the Top(base2) = 63cm and Bottom(base1) = 27 cm
Area of Trapezoid = ( ( a + b ) h ) / 2
where , a = shorter base of trapezium
b = longer base of trapezium
h = height of trapezium
On simplifying , we get
1,575 = (63 + 27) / 2 x h
1575 = 45h
Hence , the equation is 1575 = 45h
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The complete question is attached below :
The trapezoid has an area of 1,575 cm2, Which equation could you solve to find the height of the trapezoid?
A 850.5h = 1,575
B 1,701h = 1,575
C 90h = 1,575
D 45h = 1,575
Top(base2) = 63 cm
Bottom(base1) = 27 cm
25. Which correctly gives the center of dilation
and scale factor of the dilation below
a) dilated by a scale factor of 1/3 with
the origin as the center of dilation
b) reflection in the line y = -x
(x, y)-(-y, - x)
Directions: Graph and label each figure and its image under the sequence of transformations.
Give the coordinates of the image.
27. Rectangle PQRS with vertices P(-6, 9), Q(3, 6), R(0, -9), and S(-9, -6):
10,10
لهاشم
(-8,-1): 4-
B. (-8,-1);-
C. (0,-5): 4-
D. (0,-5);&-4
C
016-31
R. (20
5.16.9
P
26. N(-10, -15) is the image of N after a dilation
with a scale factor of 5/4, centered at the
origin. What are the coordinates of N
29. Which sequence of transformations will map PQ onto RS?
R
13
A. a 90° clockwise rotation about the origin,
then a reflection in the x-axis
B. a 180° rotation about the origin,
then a translation along the vector (2.2)
C. a reflection in the x-axis, then a
translation along the vector (2,6)
D. a translation along the vector (5.-2),
then a reflection in the x-axis
D.
When the point N is dilated, the coordinate of N changes to N' ,the coordinate of point N is (8,12).
What is dilation?
In arithmetic, a dilation may be a perform f from a mathematical space M into itself that satisfies the identity d=rd for all points x, y \in M, wherever d is that the distance from x to y and r is a few positive imaginary number.
Main body;
How to determine the coordinate of N
The given parameters are:
N' = (10,15)
k = 5/4
To calculate the coordinate of N, we make use of:
N * k = N'
So, we have:
N * 5/4 = (10,15)
Multiply both sides by 4
N * 5 = (40,60)
Divide both sides by 5
N = (8,12)
Hence, the coordinate of point N is (8,12)
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helppppppppppppppp me
Answer:
42
Step-by-step explanation:
5²+3(2)+5+6
25+6+5+6
31+11
42
Hope it helps
Write a linear inequality for which (-1, 2), (0, 1), and (3, -4) are solutions, but (1, 1) is not.
y ≤ -x + 1 or y ≤ (-5/3)x - 3 is the linear inequality of equation.
To start with, first we need to identify the slope of the given solutions (-1, 2), (0, 1), and (3, -4) and then use the slope-intercept form to write a linear inequality.
Let us use point slope formula to find the slope.$$slope\;m = \frac{y_2 - y_1}{x_2 - x_1}$$
Substitute the given solutions one by one and then solve for slope.$$For\;(-1,2)\;and\;(0,1)$$ $$slope\;
m = \frac{1 - 2}{0 - (-1)}$$ $$slope\;
m = -1$$$$
For\;(0,1)\;and\;(3,-4)$$ $$slope\;
m = \frac{-4 - 1}{3 - 0}$$ $$slope\;
m = -\frac{5}{3}$$
Therefore, the slope is given by the equation y = mx + b where m is the slope.
Thus, we have the equation y = -x + b and y = (-5/3)x + b.
To find the value of b, substitute the given points and then solve for b.
Substitute (0,1) on first equation $$1 = -(0) + b$$ $$b = 1$$
Substitute (3, -4) on second equation $$-4 = (-5/3)3 + b$$ $$b = -9/3 = -3$$
Now, we have all the necessary values of m and b, we can form the linear inequality as follows:$$y \leqslant -x + 1$$$$y \leqslant (-5/3)x - 3$$
Thus, the linear inequality for which (-1, 2), (0, 1), and (3, -4) are solutions, but (1, 1) is not, is y ≤ -x + 1 or y ≤ (-5/3)x - 3 (as y cannot be greater than the value derived by substituting 1 in the equation.)
Therefore, the "DETAILED ANS" to the given question is y ≤ -x + 1 or y ≤ (-5/3)x - 3.
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In Twila's class, there are 20 students. of the students are boys. How many of the students in her class are boys
Answer:
set your question well
and I will answer it
Step-by-step explanation:
\(\sf -8(6x+3)\)
_________
\( \: \)
-8(6x + 3) = ...
= (-8 × 6)x + (-8 × 3)
= -48x - 24✔
I have 345 students and I need to fit them all into chairs. However, there are some requirements my seating plan has to keep to:
- 23 rows of chairs
- Even number of students in each row
- Same number of students in each row
I don't really know how to attempt this, can someone help me out?
In each row, the 15 number of the student is arranged. For the given condition, the equal number of the student is to be arranged.
What is seating arrangement?A seating arrangement is an arrangement shows that how the peoples are arranged so that the complete utilization is done.
The given data in the problem is;
The total no of student is 345 students
If the same number of the students are to be arranged for the given row, the following calculation is done;
The numbers of the student in each row is found as;
\(\rm n= \frac{Total \ no \ of \ student\ }{Total\ no \of \ rows } \\\\\ n= \frac{345}{23} \\\\ n= 15 \ student\)
Hence, in each row, the 15 no of the student is arranged.
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Based on the regression equation, we can _______________.
Predict the value of the dependent variable given a value of the independent variable
Measure cause and effect
Measure the association between two variables
Predict the value of the independent variable given a value of the dependent variable
Based on the regression equation, we can predict the value of the dependent variable given a value of the independent variable.
The equation includes variables that represent the relationship between the dependent and independent variables, allowing us to estimate the dependent variable's value when provided with the independent variable's value. An equation is a mathematical expression that uses symbols and operations to represent a relationship between two or more variables.
Variables are factors that can change and affect the outcome of the equation. In a regression equation, one variable is considered the dependent variable, meaning that its value depends on the value of another variable, called the independent variable.
Regression analysis is a statistical method used to model the relationship between the dependent variable and one or more independent variables. The regression equation is the mathematical formula that represents this relationship. By inputting a specific value for the independent variable into the equation, we can predict the corresponding value of the dependent variable.
It is important to note that the regression equation only predicts the value of the dependent variable based on the values of the independent variable.
It does not necessarily imply causation between the two variables, nor does it measure the association between two variables directly. However, it can be a useful tool for analyzing data and making predictions based on that data.
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how to convert mm to nm
The conversion method from milimeter to nanometer is Quantity in nanometer = quantity in milimeter × 10⁶.
In the question, the two short forms mm and nm are representative of milimeter and nanometer. As per the known information, the milimeter represents 1/10³ meters and nanometer represents 1/10⁹ meters. So, we see that the difference between the exponents of 10 is 6 (as 9 - 3 = 6).
Therefore, the conversion of milimeter to nanometer will be through the mentioned formula -
Quantity in nanometer = quantity in milimeter × 10⁶
For instance, the quantity 3 mili meters in nanometer will be calculated as follows.
Quantity in nanometer = 3 × 10⁶ nanometer
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Find the inverse of f(x)=2x+7
for which positive integers n are there infinitely many multiples of n in the set 5,55,555,5555,55555
The only values of n that work are n = 1 and n = 5.
Let's call the nth element of the set as S(n).
Notice that S(n) is a number that can be written as:
\(S(n) = 5 + 50 + 500 + ... + 5 * 10^{n-1}\)
which can be simplified as:
\(S(n) = 5 * (1 + 10 + 10^2 + ... + 10^{n-1} )\)
Using the formula for the sum of a geometric series, we can simplify further:
\(S(n) = 5 * (10^n - 1) / 9\)
Now, suppose n divides S(n) (that is, S(n) is a multiple of n).
Then we have:
S(n) ≡ 0 (mod n)
\(5 * (10^n - 1) / 9\) ≡ 0 (mod n)
Multiplying both sides by 9n, we get:
\(5 * (10^n - 1)\) ≡ 0 (mod n)
\(5 * 10^n\) ≡ 5 (mod n).
Now, if n divides 5, then n = 1 or n = 5, and both of these values work. So assume that n does not divide 5.
Then, by Fermat's Little Theorem, we have:
\(10^{n-1}\) ≡ 1 (mod n)
Multiplying both sides by 10, we get:
\(10^n\) ≡ 10 (mod n)
Therefore, we have:
5 × 10 ≡ 5 (mod n)
So n divides 5, which is a contradiction.
Therefore, the only values of n that work are n = 1 and n = 5.
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If the factors of quadratic function g are (x-7) and (x+3) what are the zeros of function 9
Answer: the zeros are x = 7, -3
Step-by-step explanation:
what is this property 25x0=0
Answer:
zero property
Step-by-step explanation:
if it equals zero its zero property
consider the following two linear equations 3x+3y=-3 "-3+2y=8"
Answer:
Step-by-step explanation:
3x + 3y = -3 ------------(I)
-3x + 2y = 8 -----------(II)
Add both the equations and x will be cancelled and we can find the value of y
(I) 3x + 3y = -3
(II) -3x + 2y = 8 {Now add}
5y = 5
y = 5/5
y = 1
Now, substitute y = 1 in any of the equations. We are going to substitute in equation (I)
3x + 3*1 = -3
3x + 3 = -3
3x = -3 - 3
3x = -6
x = -6/3
x = -2
The solution of the equation is the point of intersection.
Point of intersection = ( -2, 1)
\( - 3 + 2y = 8\)
\(2y = 8 + 3\)
\(2y = 11\)
\(y = \frac{11}{2} \)
Substitute y=11/2 in the first eq:\(3x + 3( \frac{11}{2} ) = - 3\)
\(3x = 3 - \frac{33}{2} \)
\(3x = \frac{6 - 33}{2} \)
\(3x = \frac{ - 27}{2} \)
\(x = \frac{ - 27}{6} \)
Graph the equation
y-3=-3/2(x+4)
Answer: x = (-2,0) y = (0,-3) slope is -3/2
Step-by-step explanation: graph the line by using the slope and y intercept
The graph for the points (0, -3) and (2, -6) is plotted on the graph below.
The given equation is y-3= -3/2(x+4).
What is the graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter.
Graph the line using the slope and y-intercept, or two points.
Slope: -3/2
y-intercept: (0, -3)
Plot the points (0, -3) and (2, -6) on the graph
To find the x-intercept, substitute in 0 for y and solve for x. To find the y-intercept, substitute in 0 for x and solve for y.
x-intercept(s): (−2,0)
y-intercept(s): (0,−3)
Therefore, the graph for the points (0, -3) and (2, -6) is plotted on the graph below.
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Which expression has odd numbers for all of its coefficients?
A
2m+7n+1
B
3x+6y
C
4x+5
D
5a+3b+4
Answer:
Option D is correct
Step-by-step explanation:
This is because 5 and 3 are odd numbers and a coefficient is a number next to a variable and both of those coefficients in Option D are odd. Therefore, Option D is correct.
Use substitution to write an equivalent quadratic equation. (3x 2)2 7(3x 2) â€"" 8 = 0
Answer: We on da same question i do not know
Step-by-step explanation:
In your notebook, draw a right angle and then draw a bisector of the right angle. Label all parts. What are some properties of the angles formed by the bisector? Use complete sentences for full credit.
The angles formed by the bisector are equal in measure, adjacent, supplementary, form a linear pair, and are congruent.
When a line bisects an angle, it divides the angle into two equal parts. The resulting angles have several properties
They have equal measures: The two angles formed by the bisector have the same degree measurement.
They are adjacent: The two angles share a common side and vertex.
They are supplementary: The sum of the two angles formed by the bisector is 180 degrees.
They form a linear pair: The two angles, together with the adjacent angle on the other side of the bisector, form a straight line or a linear pair.
They are congruent: The two angles formed by the bisector are congruent to each other.
These properties are useful in solving problems involving angle bisectors in geometry.
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I have solved the question in general, as the given question is incomplete.
The complete question is:
What are some properties of the angles formed by the bisector?
a pulley rotates through 97 degrees in one minute. how many rotations does the pulley make in an hour?
The number of rotations made by the pulley in hour is 16 rotations
Data obtained from the questionFront the question given above, the following data were obtained:
97 degree rotation = 1 mimuteNumber of rotation in 1 hour =?How to determine the time to rotate 360 degreesWe'll begin by calculating the time to rotate 360 degrees since a complete rotation has an angle of 360 degrees. This can be obtained as illustrated below:
97 degree rotation = 1 mimute
Therefore,
360 degrees = 360 / 97
360 degrees = 3.71 minutes
How to determine the number of rotations in 1 hour1 rotation = 360 degrees = 3.71 minutes Number of rotation in 1 hour (60 minutes) =?The number of rotation made in 1 hour (i.e 60 minutes), can be obtained as follow:
3.71 mins = 1 rotaion
Therefore,
60 mins = 60 / 3.71
60 mins = 16 rotations
Thus, the pulley will made an approximate of 16 rotations in 1 hour
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What are the values of b and c?
Brainliest!°
i need help with 14 and 16
Answer:
Look at step-by-step explanation.
Step-by-step explanation:
The answer to 14 is 70 dollars.
The answer to 16 is 7 miles per hour or 7mph.
I am stuck on this question and i honestly am stuck and do not know what to do.
The basic parts of a circle include its diameter, circumference, radius, arc, chord, tangent, tangent, section, and segment.
What is Circle radius?the surface or circumference of a circle, ball, and other object measured in a straight line The radius and diameter of a circle are equal. The length of such a line. whatever radiating or radial component. A circle's chord is the line segment that connects any two locations on the circle's circumference. It should be remembered that a circle's diameter is defined as the lengthiest chord that runs across the center of the circle.
Here,
given
The letter "C" should be in the center.
radius=r=AC=CB
Diameter=d=2r=AB.
Therefore , the solution to the given problem of circle comes out to be ,the basic parts of a circle include its diameter, circumference, radius, arc, chord, tangent, tangent, sector, and segment.
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Which equation represents line AB?
O -2x+y=4
O -2x+y=8
O 2x+y=8
O 2x+y=4
The linear equation AB is:
y + 2x = 8
Which equation represents the line AB?A general linear equation can be written as:
y = a*x + b
Where a is the slope and b is the y-intercept.
Here we can see thast the y-intercept is y = 8, then:
y = a*x + 8
And we can see that it passes through the point (4, 0), then:
0 = a*4 + 8
-8 = a*4
-8/4 = a
-2 = a
Then the line is:
y = -2x + 8
y + 2x = 8
That is the correct option.
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the answer is 2x + y = 8
Step-by-step explanation:
can you apply the properties of rational exponents to an example?
We can simplify \((16x^4)^(-1/2) to 1/(4x^2)\) using the properties of rational exponents.
Certainly! Here's an example:
Simplify the expression: \((16x^4)^(-1/2)\)
We can apply the property of rational exponents which states that \((a^m)^n = a^(m*n)\). Using this property, we get:
\((16x^4)^(-1/2) = 16^(-1/2) * (x^4)^(-1/2)\)
Next, we can simplify \(16^(-1/2)\) using the rule that \(a^(-n) = 1/a^n\):
\(16^(-1/2) = 1/16^(1/2) = 1/4\)
Similarly, we can simplify \((x^4)^(-1/2)\) using the rule that \((a^m)^n = a^(m*n)\):
\((x^4)^(-1/2) = x^(4*(-1/2)) = x^(-2)\)
Substituting these simplifications back into the original expression, we get:
\((16x^4)^(-1/2) = 1/4 * x^(-2) = 1/(4x^2)\)
Therefore, the simplified expression is \(1/(4x^2).\)
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