a) 45% of 18,000 registered voters, or 8,100 people, would vote.
b) 55% of 8,100 is approximately 4,455 people who would vote for candidate A.
c) Number of votes that candidate A will receive is changing at a rate of 3% of 8,100, or approximately 243 votes per week.
What is brief answer to each part of the question?(a) If the election were held today, 45% of 18,000 registered voters, or 8,100 people, would vote.
(b) Of those planning to vote, 55% would vote for candidate A. Therefore, 55% of 8,100 is approximately 4,455 people who would vote for candidate A.
(c) The percentage who will vote for candidate A is declining by 3 percentage points per week, and the percentage of people who plan to vote is increasing by 6 percentage points per week. Therefore, the number of votes that candidate A will receive is changing at a rate of 3% of 8,100, or approximately 243 votes per week.
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find the area of the parallelogram with vertices a(−2, 5), b(0, 8), c(4, 6), and d(2, 3).
The area of the parallelogram with vertices a(-2, 5), b(0, 8), c(4, 6), and d(2, 3) is 14 square units.To find the area of a parallelogram with the given vertices, we can use the formula:
Area = |(x1y2 + x2y3 + x3y4 + x4y1) - (y1x2 + y2x3 + y3x4 + y4x1)| / 2
Let's calculate the area using the provided vertices:
a(-2, 5), b(0, 8), c(4, 6), and d(2, 3).
Substituting the coordinates into the formula:
Area = |((-2)(8) + (0)(6) + (4)(3) + (2)(5)) - ((5)(0) + (8)(4) + (6)(2) + (3)(-2))| / 2
Simplifying:
Area = |(-16 + 0 + 12 + 10) - (0 + 32 + 12 - 6)| / 2
= |6 - 34| / 2
= |-28| / 2
= 28 / 2
= 14
Therefore, the area of the parallelogram with vertices a(-2, 5), b(0, 8), c(4, 6), and d(2, 3) is 14 square units.
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Seamus sees a good helmet that is 195 and on a 35% off discount. What is the original price?
The original price of the helmet is 300.
What is percent?In mathematics, a percent is a number or ratio expressed as a fraction of 100. It is often denoted using percentage sign "%".
Now it is given that,
Price of helmet = 195
Discount on helmet = 35% = 0.35
Let the original price be x.
Now since Price of helmet = 195
Thus, Original price = x - 0.35x = 0.65x
Hence we get
0.65x = 195
Dividing both the side by 0.65 we get
x = 195/0.65
Solving we get
x = 300
this is the required original price of the helmet.
Thus, the original price of the helmet is 300.
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Xavier, Yosef & Zeke are three brothers. All together they can do 56 push-ups in 3 minutes. Xavier does as many as Yosef and Zeke combined. Zeke does two less than half as many as Yosef does. How many push-ups does Yosef do?
A. 12
B. 28
C. 8
D. 6
E. 20
Are angles 1 and angle 4 vertical? Are angles 3 and angle 5 vertical?
Answer:
All of them are not vertical angles.
Step-by-step explanation:
Because they are not directly vertical from each other.
Which of the following equations are equivalent? Select three options. 2 + x = 5 x + 1 = 4 9 + x = 6 x + (negative 4) = 7 Negative 5 + x = negative 2
The required equations that are equivalent to each other are,
(A) 2 + x = 5 (B) x + 1 = 4 (E) -5 + x = -2.
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Given equations,
(A) 2 + x = 5
Simplifying the above expression,
x = 5 - 2
x = 3
Similarly, simplify all the equations,
(B) x = 3
(C) x = -3
(D) x = 11
(E) x = 3
Therefore, equations that give x = 3, after simplification is equivalent equations.
Thus, the requried equations that are equivalent to each other are,
(A) 2 + x = 5 (B) x + 1 = 4 (E) -5 + x = -2.
What is the 10th Amendment say?.
According to 10th Amendment it defines the Federal Government only has those powers delegated in the Constitution .
No law establishing a particular religion, forbidding its practice, restricting press or speech freedom, or restricting the right of the people to peacefully assemble and petition the government for redress of grievances may be passed by Congress.
An amendment is a change or improvement that essentially maintains the integrity of the original document. The Bill of Rights is the collective name for the first ten Amendments of the Constitution. It describes Americans' constitutional rights in relation to their government. People are granted civil liberties and rights, such as the freedom of speech, the press, and religion.
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If a = pi +3j - 7k, b = pi - pj +4k and the angle between a and is acute then the possible values for p are given by
Answer:
The family of possible values for \(p\) are:
\((-\infty, -4) \,\cup \,(7, +\infty)\)
Step-by-step explanation:
By Linear Algebra, we can calculate the angle by definition of dot product:
\(\cos \theta = \frac{\vec a\,\bullet\,\vec b}{\|\vec a\|\cdot \|\vec b\|}\) (1)
Where:
\(\theta\) - Angle between vectors, in sexagesimal degrees.
\(\|\vec a\|, \|\vec b \|\) - Norms of vectors \(\vec {a}\) and \(\vec{b}\)
If \(\theta\) is acute, then the cosine function is bounded between 0 a 1 and if we know that \(\vec {a} = (p, 3, -7)\) and \(\vec {b} = (p, -p, 4)\), then the possible values for \(p\) are:
Minimum (\(\cos \theta = 0\))
\(\frac{p^{2}-3\cdot p -28}{\sqrt{p^{2}+58}\cdot \sqrt{2\cdot p^{2}+16}} > 0\)
Maximum (\(\cos \theta = 1\))
\(\frac{p^{2}-3\cdot p -28}{\sqrt{p^{2}+58}\cdot \sqrt{2\cdot p^{2}+16}} < 1\)
With the help of a graphing tool we get the family of possible values for \(p\) are:
\((-\infty, -4) \,\cup \,(7, +\infty)\)
The dot product between the two vectors is the product of the magnitude between them times cosine angle.
The possible values for \(p\) is (7,-4), when the angle is acute between \(a\) and \(b\).
To find the value of \(p\) we need to perform the dot product of two equation.
How do you multiply vector in dot product?The dot product between the two vectors is the product of the magnitude between them times cosine angle
Given information-
The vector equation given in the problem is,
\(a = p\hat i +3\hat j - 7\hat k\)
\(b = p\hat i - p\hat j +4\hat k\)
For acute angle, the dot product of \(a,b\) less than equal to zero.
Thus,
\(a .b<0\)
Put the values,
\((p\hat i +3\hat j - 7\hat k)(p\hat i - p\hat j +4\hat k)<0\)
In the dot product the multiplication of different unit vector is zero. Thus,
\(p^2-3p-28<0\)
Factorize above equation using the split the middle term method as,
\(p^2-7p+4p-28<0\\(p-7)(p+4)<0\)
As the factor of the above equation is 7 and -4.
Thus the possible values for \(p\) is (7,-4), when the angle is acute between \(a\) and \(b\).
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Please help I’m on the quizzz
Answer:
2/30 or simplified 1/15
Step-by-step explanation:
dr carl is a mathematics and statistics lecturer. he is interested in studying a new approach at teaching mathematics and statistics in high school. recently this new approach has been adopted. it was previously the case that the mean score for all high school students doing their end of year exam was 71, however, the population standard deviation is unknown. the scores of all students are approximately normally distributed. he thinks that, with this new teaching approach, the mean score may have increased. a random sample of 39 scores is gathered and the sample mean and standard deviation calculated. dr carl will conduct a hypothesis test using a level of significance of 0.01. select the correct null and alternative hypotheses for this test:
The test is one-tailed to the right due to the Alternate hypothesis.
In a hypothesis test, a Null hypothesis (H0) is a statement of "no effect" or "no difference," whereas the Alternate hypothesis (HA) is a statement of "some effect" or "some difference." Here are the correct null and alternative hypotheses for the given scenario: Null hypothesis: H0: μ = 71, Alternative hypothesis: HA: μ > 71 (One-tailed test) we have a one-tailed hypothesis test since the research hypothesis is directed. In a one-tailed test, we're looking for a difference in one direction only. In this case, Dr Carl thinks that there has been an improvement, so the alternative hypothesis reflects this. Therefore, the test is one-tailed to the right.
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What four consecutive integers have a sum of 90?
Answer:
x, x+1, x+2, x+3.
Step-by-step explanation:
I took the test
Answer:
21 + 22 + 23 +24 = 90
Step-by-step explanation:
Let's represent this with x:
x+x1+x+2+x+3 = 90
Group the x's together
4x+6 = 90
subtract 6 on both sides
4x=84
x=84/4
x= 21
a helpful rule for converting radians to degrees is
Answer:
Degrees = Radians x 180/π
or
Degrees = 57.2958 x radians
Step-by-step explanation:
1 radian = 180/π degrees
1 radian = 57.2958 degrees
Multiply radians by this factor of 57.2958 to get the equivalent measure in degrees
π radians = 180°
2π radians = 360° which is the number of degrees in a circle
For anything greater than 2π radians you will have to subtract 360°
For example, 7 radians using the formula is 7 x (57.2958 ) ≈ 401.07°
But this still falls in the first quadrant, so relative to the x-axis it is
401.07 - 360 = 41.07°
A scale model of the front view of Tony’s house is shown.
What is the minimum amount of paint needed for two coats?
A. 594 square centimeters
B. 297 square centimeters
C. 216 square centimeters
D. 81 square centimeters
The minimum amount of paint needed for two coats will be 297 square centimeters.
The shape is a combination of the rectangle and the triangle. Then the area of the shape is calculated as,
A = 1/2 x 18 x 9 + 18 x 12
A = 81 + 216
A = 297 square centimeters
Hence, the minimum amount of paint needed for two coats will be 297 square centimeters.
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Show that from any subset of 51 numbers taken from {1, 2, 3, ..., 100}, there exists a pair of elements such that one divides another.
Consider the 50 odd numbers 1,3, 5, ..., 99.
For each one, form a box containing the number and all powers of 2 times
the number.
So the first box contains {1,2,4,8, 16,..}
the next box contains {3,6,12,24,48, ...}
Then among the 51 numbers chosen, the pigeonhole principle tells us that there are two that are contained in the same box. They must be of the form \(2^{m} k\) and \(2^{n} k\) with the same odd number k. So one will divide the other.
What is pigeonhole principle?According to the pigeonhole principle, if n items are placed in m containers, with n > m, at least one container must contain more than one item.
For example, if you have three gloves (and none of them are ambidextrous/reversible), you must have at least two right-handed gloves or at least two left-handed gloves, because there are three objects but only two categories of handedness to put them into.
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How do we find the "rate of change"
Answer: To find the average rate of change, divide the change in y-values by the change in x-values
Step-by-step explanation:
Which table of ordered pairs matches the following function?
2y + 8x = 2
can you give me the answers to see if I did any mistakes
1.) The value of X would be = 3cm. That is option A.
2.). The value of X (in cm) would be = 4cm. That is option B.
How to calculate the missing values of the given triangles above?For question 1.)
Given that ∆ABC≈∆PQR
Scale factor = larger dimension/smaller dimension
= 6/4.5 = 1.33
The value of X= 4÷ 1.33 = 3cm
For question 2.)
To calculate the value of X the formula that should be used is given as follows:
PB/PB+BR = AB/AB+QR
where;
PB= 3.2
BR = 4.8
AB = 2
QR= X
That is;
3.2/4.8+3.2= 2/2+X
3.2(2+X) = 2(4.8+3.2)
6.4+3.2x = 16
3.2x= 16-6.4
X= 12.8/3.2 = 4cm.
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the perimeter of the polygon above 8cm 8cm 8 cm 8 cm all sides brainly
The polygon has 10 sides.
Each side of the polygon has a measure of 8 cm.
Therefore, the required perimeter is given by:
\(8\times10=80\)Therefore, the required perimeter is 80 cm
when three or more lines intersect at a common point, the lines are called
Concurrent line segments are those that cross at least three other line segments at the same location.
What is concurrent lines?Concurrent line segments are those that cross at least three other line segments at the same location. In geometry, if two lines intersect at a single point in a plane or higher-dimensional space, they are said to be concurrent. In contrast to parallel lines, they exist. Concurrent lines are those that cross more than one line at the same time through a single point in a plane. The point of concurrency is a location that each of those lines shares. Triangles provide another example where this concurrency characteristic can be observed.
Here,
Concurrent line segments are those where three or more line segments cross each other at the same location.
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True or False.
(a) The standard deviation of a data set cannot be negative.
(b) If P(A)=0.4, P(B)=0.5and A and B are disjoint, then P(A AND B)=0.2.
(c) The mean is always equal to the median for a normal distribution.
(d) A 95%95% confidence interval is wider than a 98%98% confidence interval of the same parameter.
(e) In a two-tailed test, the value of the test statistic is 1.51.5. If we know the test statistic follows a Student's t-distribution with P(T<1.5)=0.98, then we fail to reject the null hypothesis at 0.050.05 level of significance.
The correct answer are as follows
a) True, b) False, c) False, d) False, e) False
(a) True. The standard deviation is always a non-negative value since it is a measure of the spread or variability of the data set.
(b) False. Since A and B are disjoint, they have no overlapping outcomes, which means P(A AND B) = 0.
(c) False. Although the mean and median are often close in a normal distribution, they are not always equal. The median is the middle value of the distribution, while the mean is the average of all values.
(d) False. A 95% confidence interval is narrower than a 98% confidence interval of the same parameter since it requires a higher level of confidence to have a wider interval.
(e) False. If the value of the test statistic is 1.5 and P(T<1.5)=0.98, then the p-value is 0.02. Since the p-value is less than the level of significance of 0.05, we reject the null hypothesis.
(a) True. The standard deviation of a data set cannot be negative because it is a measure of dispersion and is calculated as the square root of the variance, which is always non-negative.
(b) False. If A and B are disjoint, then P(A AND B) = 0, since disjoint events cannot occur simultaneously.
(c) True. For a normal distribution, the mean is always equal to the median, indicating a symmetrical distribution.
(d) False. A 95% confidence interval is narrower than a 98% confidence interval of the same parameter because a higher confidence level requires a wider interval to capture the true value with greater certainty.
(e) True. In a two-tailed test, if the test statistic follows a Student's t-distribution with P(T<1.5)=0.98, this means that P(T>1.5)=0.02. For a two-tailed test at a 0.05 level of significance, the rejection regions are in both tails, with 0.025 in each tail. Since P(T>1.5)=0.02 < 0.025, we fail to reject the null hypothesis.
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HELP FAST!!
a person on a boat looks up at the top of a lighthouse and calculates the angle of elevation to be 27°. if the lighthouse is 108 ft tall, how far is the boat from the base of the lighthouse?
8/9 with a exponet of 0
Answer:
1
Step-by-step explanation:
this is because the number is not getting multiplied by anything.
Answer:
1
Step-by-step explanation:
(8/9) ^0
Any number( besides 0) raised to the power of 0 is 1
if alpha and beta are zeroes of x2-3x+q. what is the value of q, if 2 alpha+3 beta=15
The value of q is -27.
Recall Vieta's Formulas, which state that for a quadratic equation \(ax^2\) + bx + c = 0 with zeroes alpha and beta, the sum of the zeroes is equal to -b/a, and the product of the zeroes is equal to c/a.
In our equation \(x^2\) - 3x + q, the sum of the zeroes alpha and beta is -(-3)/1 = 3.
We are given that 2 alpha + 3 beta = 15. Substitute alpha = (15 - 3 beta)/2 into the equation.
Replace the value of alpha in the sum of zeroes equation: (15 - 3 beta)/2 + beta = 3.
Simplify the equation by multiplying both sides by 2: 15 - 3 beta + 2 beta = 6.
Combine like terms: 15 - beta = 6.
Subtract 15 from both sides: -beta = -9.
Multiply both sides by -1 to solve for beta: beta = 9.
Substitute the value of beta into the sum of zeroes equation: alpha = (15 - 3 * 9)/2 = -3.
Since we have the values of alpha and beta, we can find q using the product of the zeroes formula: q = alpha * beta = -3 * 9 = -27.
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Use the drop-down menu to complete the following sentence.
2/3 divided by 4/6 = ?
Answer:
277/10000
Step-by-step explanation:
Please can someone answer this
Answer:
The correct answer is a total of 9 arrangements with a total of 8 balloons in each. 4 mb, 3 wb, 2 ob.
Step-by-step explanation:
There is a total of 72 balloons just divide by 8.
72/8 = 9
since 32, 24, 16 are divisible by 8 now we can divide and get 9 arrangements.
4 maroon ballons
3 white balloons
2 orange balloons
9 total
16. After the hurricane, the small tree in my neighbor's yard was leaning. To keep it from falling, we
nailed a 6-ft. strap into the ground 4 feet from the base of the tree. We attached the strap to the
free 3.5 feet above the ground. How far from vertical was the tree leaning?
Using trigonometric ratios, tree is leaning 106.1°-90° = 16.1° away from the vertical.
Pythagorean identities, reciprocal identities, sum and difference identities, double angle and half-angle identities are the main trigonometric identities. We must apply the sine rule and the cosine rule to the non-right-angled triangles.
6² = 3.5²+4² -2(3.5) (4) cos θ
36 = 12.2.5+16 - 28 cos θ
36 = 28.25 - 28 cos θ
7.75 = -28cos θ
7.75 / 28 = cos θ
Cos⁻¹ (7.75/28) = θ
106.1°=θ
So, the tree is leaning 106.1°-90° = 16.1° away from the vertical
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Carlos went to PetSmart to get his hamster an exercise ball. There was a small one with a 5 inch diameter and a 13 inch ball. How much more space (volume) is in the larger than the smaller? Round to the nearest tenth.
The amount of space (volume) that is in the larger spherical ball than the smaller = 1,084.8 in.³
What is the Volume of a Sphere/Spherical Solid?To find the volume of a sphere, which is the amount of space the solid contains, the formula used is given as: 4/3 πr³, where r is the radius of the sphere, which is half the measure of the diameter. Volume of sphere (V) = 4/3 πr³.
Diameter of the smaller spherical ball = 5 inches
Radius of the smaller spherical ball = 5/2 = 2.5 inches
Volume of the smaller spherical ball = 4/3 πr³ = 4/3 × π × 2.5³
Volume of the smaller spherical ball ≈ 65.5 in.³
Diameter of the larger spherical ball = 13 inches
Radius of the larger spherical ball = 13/2 = 6.5 inches
Volume of the larger spherical ball = 4/3 πr³ = 4/3 × π × 6.5³
Volume of the larger spherical ball ≈ 1,150.3 in.³
The amount of space (volume) that is in the larger spherical ball than the smaller = 1,150.3 - 65.5
The amount of space (volume) that is in the larger spherical ball than the smaller = 1,084.8 in.³
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Solve each system of linear equations using the elimination mehod
-8x + 10y = -22
8x - 15y = 17
Answer: y = 1 and x = 4
Step-by-step explanation:
-8x + 10y = -22
8x - 15y = 17
-----------------------
- 5y = -5 Add the two equations to eliminate x
y = 1 Solve for y
=====
8x - 15y = 17 (y = 1) Use y=1 in either equation
8x - 15 = 17
8x = 32
x = 4 Ta da
Answer:
solution: x = 4, y = 1 or (4, 1)
Step-by-step explanation:
To solve the system of linear equations using the elimination method, simply add both equations together (since the coefficeints of x have opposite signs):
-8x + 10y = -22
+ 8x - 15y = 17
- 5y = -5
Divide both sides by -5 to solve for y:
\(\frac{-5y}{-5} = \frac{-5}{-5}\)
y = 1
Next, substitute the value of y into one of the equations to solve for x:
-8x + 10y = -22
-8x + 10(1) = -22
-8x + 10 = -22
Subtract 10 from both sides
-8x + 10 - 10 = -22 - 10
-8x = -32
Divide both sides by -8 to solve for x:
\(\frac{-8x}{-8} = \frac{-32}{-8}\)
x = 4
Therefore, the solutions to the given systems of linear equations are: x = 4, y = 1 or (4, 1).
Which function represents the dotted graph
Answer:
y=f(x-2)-1
Step-by-step explanation:
-x is left and -y cordnate is down 1 is the y
Find the equation of the exponential function that goes through the points (0,4) and (4,0.25).
The answer of the given question based on the exponential function is the exponential function that goes through the points (0,4) and (4,0.25) is: f(x) = 4(0.5)ˣ.
What is Equation?An equation is a statement that two expressions are equal. It contains an equal sign (=) which separates the two expressions, and it can include variables, constants, and mathematical operations such as addition, subtraction, multiplication, division, exponents, and roots.
The general form of exponential function is:
f(x) = a(b)ˣ
where a is the initial value, b is the base, and x is the independent variable.
We can use the two given points to form a system of equations and solve for the values of a and b.
Using the point (0,4):
f(0) = a(b)⁰ = a = 4
Using the point (4,0.25):
f(4) = a(b)⁴ = 0.25
Now we can substitute a = 4 into the second equation and solve for b:
4(b)⁴ = 0.25
(b)⁴ = 0.25/4 = 1/16
b = (1/16)⁽¹/⁴⁾ = 0.5
Therefore, the exponential function that goes through the points (0,4) and (4,0.25) is: f(x) = 4(0.5)ˣ
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How do i solve this paper?
I feel like my answers are gone and i need help.
Answer:
you have it correct sir
Step-by-step explanation: