The currect option is (b) H0: p = 0.5; Ha: p > 0.5
p represents the population proportion.
A null hypothesis is a statement from the population parameter which is either rejected or accepted (fail to reject) upon testing. It is expressed using the equality sign.
An alternate hypothesis is also a statement from the population parameter which negates the null hypothesis and is accepted if the null hypothesis is rejected. It is expressed using any of the inequality signs.
An opinion poll asks a random sample of adults whether they favor banning ownership of handguns by private citizens. a commentator believes that more than half of all adults favor such a ban. the null and alternative hypotheses you would use to test this claim are
a) H0:p^=0.5;Ha:p^>0.5
(b) H0:p=0.5;Ha:p>0.5
(c) H0:p=0.5;Ha:p<0.5
(d) H0:p=0.5;Ha:p≠0.5
(e) H0:p>0.5;Ha:p=0.5
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In one trip to the hardware store you buy 15 boards, 3 boxes of nails, and a saw. One a second trip you buy 9 more boards and a box of nails. Define and use variables to represent the total cost.
The variables representing the total cost of the items bought are x and y.
Where X is the total cost of the items bought during the first trip and Y is the total cost of the items bought during the second trip.
Items bought on the first trip:
Boards = 15
Boxes of nails = 3
Total cost = x
Items bought on the second trip:
Boards = 9
Boxes of nails = 1
Total cost = y
Variables:Let a piece of board = b
Let a box of nails = n
Let the total cost for the first trip = x
Let the total cost for the second trip = y
Equations:x = 15b + 3n
y = 9b + n
Explain how you would find the value of x.
Find the value of x.
3x + 1
2x
4x+7
5x-4
x+1
3x-5
pls help me its urgent ty
Each of the quadratic function should be factorized as follows;
x² - 6x + 8 ⇒ (x - 4)(x - 2).
x² - 4x - 32 ⇒ (x - 8)(x + 4).
x² + x - 42 ⇒ (x - 6)(x + 7).
What is a quadratic function?In Mathematics, the standard form of a quadratic function is given by this mathematical expression;
ax² + bx + c = 0
Where:
a and b represents the coefficients of the first and second term in the quadratic function.c represents the constant.Next, we would solve each of the quadratic function by using the factorization method as follows;
x² - 6x + 8 = 0
x² - 4x - 2x + 8 = 0
x(x - 4) - 2(x - 4) = 0
(x - 4)(x - 2) = 0
x² - 4x - 32 = 0
x² - 8x + 4x - 32 = 0
x(x - 8) + 4(x - 8) = 0
(x - 8)(x + 4) = 0
x² + x - 42 = 0
x² - 6x + 7x - 42 = 0
x(x - 6) + 7(x - 6) = 0
(x - 6)(x + 7) = 0
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Problem #1 - Luca went
grocery shopping for
some last-minute picnic
supplies. He knows that
the sliced turkey was
$3.50 per 1 1/4-pounds
and coleslaw was $1.35
per 1/2 pound. How
much would it cost him if
he bought 3 pounds of
turkey and 1 1/2 -pounds
of coleslaw?
Problem #2 - Fill in the
Why?
The required it would cost $12.45 to buy 3 pounds of turkey and 1 1/2 pounds of coleslaw.
What are expression models?The expression model is defined as the model of the given situation in the form of an equation using variables and constants.
Here,
To calculate the cost of the turkey, we need to find the price per pound and then multiply it by the number of pounds. The price per pound is,
= $3.50 ÷ (1 1/4 pounds)
= $2.80 per pound
To find the cost of 3 pounds of turkey, we can multiply the price per pound by the number of pounds:
= 3 pounds × $2.80 per pound = $8.40
To find the cost of the coleslaw, we can simply multiply the price per half pound by the number of half pounds,
1 1/2 pounds = 3 half pounds
= 3 half pounds × $1.35 per half pound
= $4.05
Finally, we can add the cost of the turkey and the coleslaw to find the total cost:
$8.40 + $4.05 = $12.45
Therefore, it would cost $12.45 to buy 3 pounds of turkey and 1 1/2 pounds of coleslaw.
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20. Mr. Lewinger has to choose 2 students to
lead the class field trip. If he draws from a
list of 6 boys and 6 girls, what is the
probability that the names of 2 girls will be
drawn?
A.5/24
B.5/22
C.1/7
D.5/6
Answer:
B. 5/22
----------------------
Total number of students is:
6 + 6 = 12Probability of a first girl is 6 of 12:
girls / total = 6/12 = 1/2Probability of a second girl is 5 of 11 since both numbers reduced by one:
girls / total = 5/11Probability of the two events is:
1/2*5/11 = 5/22Correct choice is B.
Graph the line with Slope 7 and y-intercept -8
Answer:
y=7x-8
Step-by-step explanation:
You start off with the equation y= mx+b, where m = the slope (7/1) and b, which is (0,-8). Then you can graph. You first put a dot at (0,-8). Then you count up to 7 and then go to the right 1. You continue the pattern until the line is over the graph. The equation would be y= 7x-8
12x (3+2’2) divided by 2-10
Answer:
-5.5
Step-by-step explanation:
[12*(3/(2^2))]/2-10 [Rewritten to add brackets.
Use PEDMAS to determine order of operation.
P =- parentheses first:
[12*(3/(2^2))]/2-10
[12*(3/(4))]/2-10 [squared the 2]
[12*(3/4)]/2-10 [Removed excess parentheses]
[12*(3/4)]/2-10 [Next parenthses: 12*(3/4) Divide and Multioply]
[9]/2 - 10 [Divide and Multiply]
4.5 - 10 [Add/Subtract]
-5.5 Result
the graph of a line goes through the points (-2, -3) and (2, -1). which linear equation represents this line?
The linear equation of the line which passes through the points (-2, -3) and (2, -1) is:
y + 3 = 0.5 (x + 2)
What is meant by a linear equation?
An equation is said to be linear if the maximum power of the variable is consistently 1. Another name for it is a one-degree equation. A linear equation is a straight line equation.
It is of the form: y = mx + c
where m = slope of the line
c = x-intercept of line.
The linear equation of a line is:
y - y₁ = m ( x - x₁)
Given two points on the line
(x₁ , y₁) = (-2, -3)
(x₂ , y₂) = (2, -1)
m = slope of line = (y₂ - y₁) / (x₂ - x₁) = (-1 - (-3)) / (2 - (-2)) = 2/4 = 1/2
Now substituting this value in the general equation, we can write the equation as:
y - (-3) = 1/2 ( x -(-2))
y + 3 = 0.5 (x + 2)
Therefore the linear equation of the line which passes through the points (-2, -3) and (2, -1) is:
y + 3 = 0.5 (x + 2)
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5. People Population The country of Elbonia was established in 2012. Its population at the time was 5
million and is growing at an annual rate of 3.2%. The neighboring country of Neecapia was established
at the same time. Its population was 4.1 million and is growing at an annual rate of 6.5%.
Answer:
Step-by-step explanation:
yes because the montly rate is 6.5%
Park rangers released 4 fish into a pond in year 0. Each year, there were three
times as many fish as the year before. How many fish were there after x
years? Write a function to represent this scenario.
A. f(x) = 3(x)4
B. f(x) = 4(3)x
C. f(x) = 3(4)x
D. f(x) = 4(x)3
The complete question:
Park rangers released 4 fish into a pond in year 0. Each year, there were three times as many fish as the year before. How many fish were there after x years? Write a function to represent this scenario.
An function which best represent the given scenario is, 4 x 3ˣ. So option B is correct.
What is geometric progression?In algebra, in sequence we study various progressions, one of the progression is geometric, in this progression for every two consecutive terms, the common ratio is the same.
Formula for nth term of G.P.,
Tₙ = a×rⁿ
where a is first term and r is common ratio
Given that,
Park rangers released 4 fish into a pond in year 0.
Each year, there were three times as many fish as the year before.
The number of fish after x years = ?
After 1 year,
the number of fish = 4 x 3
After 2 year,
the number of fish = 4 x 3 x 3
= 4 x 3²
After 3 year,
the number of fish = 4 x 3² x3
= 4 x 3³
Similarly, after x years
the number of fish = 4 x 3ˣ
Hence, the expression is 4 x 3ˣ
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i need to reask this:
I need help with this since my school switched teachers and we didnt take it and the new teacher is refusing to teach us it
let's pry open the triangles a bit and plug their values for the pythagorean theorem to get the hypotenuse, Check the picture below, those are only the first 4 triangles, notice the hypotenuse.
now let's move like the crab, backwards, let's do D first and then C
D)
well, since for the 1st triangle the root has a "2", that means "1+1", and it's pretty much the same for any subsequent triangle, so the rule must be
[tex]{\Large \begin{array}{llll} P_{n}=\sqrt{n+1} \end{array}}\hspace{5em}\textit{rule for the }n^{th}~triangle[/tex]
C)
what does that make the 9th one?
[tex]{\Large \begin{array}{llll} P_{9}=\sqrt{9+1}\implies P_9=\sqrt{10} \end{array}}[/tex]
Andy bought cupcakes for his sister's birthday party. 75% of the 16 cupcakes had sprinkles on top. How many cupcakes had sprinkles?
You buy 1 box of dog food and 2 cans of cat food for $23. Your friend buys 2 boxes of dog food and 1 can of cat food for $22. What is the cost of each box of dog food?
One box of dog food costs $7, while one can of cat food costs $8.
What is an Equation?Equations are statements in mathematics that have two algebraic expressions on either side of the equals (=) sign.
It illustrates that the expressions printed on the left and right sides have an equal relationship.
Some of the components of an equation are coefficients, variables, operators, constants, terms, expressions, and the equal to sign. When expressing an equation, the "=" symbol and terms on both sides are a need.
Given data ,
Let the price of a single box of dog food at x.
Let's say the price of one can of cat food is y.
The cost of 1 box of dog food and 2 cans of cat food is = $ 23
One can of cat food and two boxes of dog food cost $22, total.
So , the equation will be
1x + 2y = 23 ....... (1)
2x + 1y = 22 ....... (2)
Equation (1) is multiplied by 2 to get
2x + 4y = 46 ....... (3)
When equation (2) is subtracted from equation (3), we obtain
3y = 24
value of y is obtained by dividing both sides by 3,
y = $ 8
Equation (1) can be solved by substituting the value of y.
x + [tex]2*8[/tex] = 23
x + 16 = 23
16 is subtracted from both sides, giving us
x = $ 7
Therefore , the value of x is $ 7 and value of y is $ 8
Thus, one package of dog food costs $7, while one can of cat food costs $8.
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An expression is given.
Which expression is equivalent to the given expression?
A
−13x+12-13x+12−13x+12
B
10x2−7x−1210x^2-7x-1210x
2
−7x−12
C
10x2−23x+1210x^2-23x+1210x
2
−23x+12
D
7x2−23x−77x^2-23x-77x
2
−23x−7
The equation -13x+12-(-13x+12)-13x+12 = -13x+12 is equivalent to the given expression that is -13x+12.
10x^2 - 23x + 12 = (5x - 3)(2x - 4) = 0
So the solutions to the equation are x = 3/5 or x = 2.
Therefore, this expression is not equivalent to -23x + 12 for all values of x.
10x^2 - 7x - 12 = 0 can be factored as (2x - 3)(5x + 4) = 0.
So the solutions to the equation are x = 3/2 or x = -4/5.
Therefore, this expression is not equivalent to -7x - 12 for all values of x.
-13x+12-(-13x+12)-13x+12 = -13x+12
-13x+12 = -13x+12
This expression is equivalent to -13x+12 .
7x^2 - 23x - 77 = (7x + 11)(x - 7) = 0
So the solutions to the equation are x = -11/7 or x = 7.
Therefore, this expression is not equivalent to -23x - 7 for all value x.
The given expressions of each case are not equivalent to the given equations for all values of x, except −13x+12-(-13x+12)-13x+12 = -13x+12 which is equivalent to -13x+12 .
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______The given question is incorrect, the correct question is given below:
An expression is given on equation
Which expression is equivalent to the given expression of each case
?
A
10x2−23x+1210x^2-23x+1210x = −23x+12
B
10x2−7x−1210x^2-7x-1210x = −7x−12
C
−13x+12-(-13x+12)-13x+12 = -13x+12
D
7x2−23x−77x^2-23x-77x = −23x−7
The __________________________________ property of addition states that the way addends are grouped does not affect their sum
The Commutative property Associative property Identity property property of addition states that the way addends are grouped does not affect their sum.
The commutative property of addition states that the sum is unaffected by the order of the addends. 2+3=3+3
Changing the order of the addends has no effect on the sum, according to the associative property of addition.
(2+3)+4=2+(3+4)
Identity of addition property: Any number is equal to the sum of 0 00 and that number. For instance 0+5=5
According to the commutative property of addition, altering the order of addends has no impact on the sum. 2+3 = 3+2
as 3 rules are there only
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which of the following shows 87 and 1/2% as a fraction? 7/8, 5/8, -8/75, none of these
Answer:
Step-by-step explanation:
87.5% = 87.5/100 = 875/1000= 7/8
For each ordered pair, determine whether it is a solution to the system of equations. -18x+2y=8 and y=9x+4
For the given system of equations, no solution is possible.
What is the system of equations?One or many equations having the same number of unknowns that can be solved simultaneously are called simultaneous equations. And the simultaneous equation is the system of equations.
Given:
The system of equations,
-18x + 2y = 8 {equation 1}
y = 9x + 4 {equation 2}
Substitute the value of y from equation 2 to equation 1,
we get,
-18x + 18x + 8 = 8
0 = 0
That means, the lines of the equation are parallel to each other.
Therefore, no solution is possible for the system.
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As Bin is driving her car, she notices that after 1 hour her gas tank has 7.25 gallons left and after 4 hours of
driving, it has 3,5 gallons of gas left in it.
(3) Represent this information as two coordinate
pairs in the form (1, g), Where A is the
number of hours driven and g is the gallons of Gas left
Bin had 7.25 gallons of gas to start with using the unitary method.
Unitary method is a problem-solving technique that involves finding the value of one unit and using it to calculate the value of other units. In this case, we will use unitary method to find the number of gallons Bin had to start with.
Firstly, we need to find the rate of gas consumption. The slope of the line, which is the change in the gas level over time, gives us this information. Since the slope is -1.25, this means Bin is losing 1.25 gallons of gas per hour.
Next, we need to find the total time Bin has been driving. From the problem, we know that after 1 hour, she had 7.25 gallons left, and after 4 hours, she had 3.5 gallons left. This means that she drove for 3 hours (4-1).
Using the unitary method, we can calculate the total amount of gas Bin had to start with. We know that she lost 1.25 gallons of gas per hour, and she drove for 3 hours. Therefore, she lost a total of 3.75 gallons of gas during the trip.
To find the initial gas level, we need to subtract the amount of gas she lost from the gas level she had at the end of the trip. This gives us:
Initial gas level = Gas level at end of trip + Gas lost during the trip
Initial gas level = 3.5 gallons + 3.75 gallons
Initial gas level = 7.25 gallons
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Complete question:
As Bin is driving her car, she notices that after 1 hour her gas tank has 7.25 gallons left and after 4 hours of driving, it has 3.5 gallons of gas left in it. The rate at which she is LOSING gas is 1.25 gallons....So, the slope is -1.25. How many gallons did she have to START?
what is -2x+4=-6x-17
Which investment results in the greatest total amount? Investment A: 3000$ invested for 7 years compounded semiannually at 7% Investment B: $5,000 invested for 4 years compounded quarterly at 3.2%.
With the given compound interests, Investment B results in greatest total amount.
What exactly is compound interest?
Compound interest is interest charged on a loan or deposit. It is the most widely utilised idea in our everyday lives. The compound interest for an amount is determined by both the principal and the interest earned over time. This is the primary distinction between compound and simple interest.
Compound interest calculation formula:
A=P(1+r/n)ⁿˣ
Where,
A Equals Amount
P stands for principal.
r = interest rate
n is the number of times interest is compounded each year.
x = time (in years)
Alternatively, the formula may be written as follows:
CI = A – P
Where CI stands for Compound Interest.
Now,
For A
principal = $3000, Rate = 7% compounded semiannualy and time = 7 years
amount=3000(1+7/200)¹⁴
A=3000*1.61
=$4856
For B
principal = $5000, Rate = 3.2% compounded quaterly and time = 4 years
amount = 5000(1+3.2/400)¹⁶
A=5000*1.13
=$5680
hence,
Investment B results in greatest total amount.
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Ben says this system of equations has one solution. Is he correct? Explain
Answer:
what system of equations? and ben is a bad name, try and come up with another one
Step-by-step explanation:
Given that axb2x c3x = 2, where a, b, and c are] positive real numbers, then x =
A bucket contains 1 1/2 gallons of water. Is the amount of water in the bucket greater than less than or equal to 6 quarts
One gallon is equivalent to 4 quarts, so 1 1/2 gallons is equal to 1 1/2 x 4 = 6 quarts. To determine if the amount of water in the bucket is greater than, less than, or equal to 6 quarts, we need to convert the amount from gallons to quarts.
A gallon is a unit of volume commonly used in the United States, while a quart is a unit of volume commonly used in both the US and the UK.
One gallon is equivalent to 4 quarts, so 1 1/2 gallons is equal to 1 1/2 x 4 = 6 quarts.
Therefore, the amount of water in the bucket is equal to 6 quarts.
It's important to be able to convert between different units of measurement to effectively communicate and understand various quantities. In the case of volume, it's crucial to use consistent units when comparing the amount of liquids in containers or when measuring the volume of substances.
Conversion between units of measurement also plays a significant role in many fields, such as cooking, baking, construction, and engineering, where precise measurements are critical.
In conclusion, the amount of water in the bucket is equal to 6 quarts, and the ability to convert between different units of measurement is an important skill in various areas of life and work.
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FIFTEEN 15 POINTS! pls help with functions :)
Answer:
A
Step-by-step explanation:
If you look at the graph it starts at 30 and the next time it lines up on the lines is 3 up and 2 over. Therefore it is 3/2x+30
3. Zaidi says the table does not represent a function because all of the inputs have the same output 20. Is Zaidi correct?
From the table, the conclusion can be made that for any value of the input, the value of the output remains the same. Then the correct option is C.
What is a function?A function is an argument, concept, or regulation that demonstrates an association between two variables. Functions may be located throughout mathematics and are necessary for the expansion of significant linkages.
If the number of values of the variable 'y' is more than one for a given value of 'x', then it is not a function.
The table is given below.
x y
- 5 20
0 20
5 20
10 20
From the table, the conclusion can be made that for any value of the input, the value of the output remains the same. Then the correct option is C.
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The complete question is attached below.
freight train cars in a train yard there are tank cars, boxcars, and flatcars. how many ways can a train be made up consisting of tank cars, boxcars, and flatcars? (in this case, order is not important.)
The number of ways can a train made up consisting of tank cars, box cas and flat cars is 166320
Total number of tank cars = 4
Total number of Box cars = 112
Total number of flat cars = 5
Here we have to apply the concept of combinations
Number of ways of selecting 2 tank car from 5 = [tex]4C_2[/tex]
= 4! / 2!( 4-2) !
= 6
Number of ways of selecting 5 Box cars from 12 = [tex]12C_5[/tex]
= 12! / 5!(12-5)!
= 792
Number of ways of selecting 3 flat cars from 7 = [tex]7C_3[/tex]
= 7! / 3!(7-3)!
= 35
Number of possible ways can a train be made up = 6 × 792 × 35
Multiply the numbers
= 166320
Therefore, the number of possible ways is 166320
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The given question is incomplete, the complete question is :
Freight Train CarsIn a train yard there are 4 tank cars. 12 boxcars, and 7 flatcars. How many ways can a train be made up consisting of 2 tank cars, 5 boxcars, and 3 flatcars?
Luke sells 386 dollars worth of candy bars as part of a school club fundraiser. If the candy bars cost 297 dollars, what equation can we make to find out how much money Luke raised as the variable x ?
Pls help thank you will mark the Brainliest
The exponential function that represents the given scenario is
y = (30.5)(0.7)ˣ.
The exponential function is a type of mathematical equation that can be used to determine if anything is increasing or decreasing exponentially, such as population, money, or price.
The general form of an exponential function is given by
f(x) = abˣ or y = abˣ
Where 'x' is a variable and a and b are constants
Here we have
The graph shows the number of games system sold since 2005.
As we know an exponential function is represented as:
=> y = abˣ
From the given graph x = 0 and y = 30.5
=> 30.5 = ab⁰
=> 30.5 = a(1)
=> a = 30.5
When x = 1, y = 21.35
=> 21.35 = (30.5)(b¹)
=> b = 0.7
So the required exponential function can be written as
=> y = (30.5)(0.7)ˣ
Therefore,
The exponential function that represents the given scenario is
y = (30.5)(0.7)ˣ.
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A pole that is 2.8 m tall casts a shadow that is 1.01 m long. At the same time, a nearby tower casts a shadow that is 45.5 m long. How tall is the tower? Round
your answer to the nearest meter.
Answer: 147m
Step-by-step explanation: the tower's height can be calculated using the following equation: height = (shadow length/pole shadow length) * pole height Therefore, the tower's height is: height = (45.5/1.01) * 2.8 height = 146.5 m The tower's height is approximately 147 m, rounded to the nearest meter
repeat your t-test above, this time using only players who make over $600k. is the difference in average salary between first basemen and all other players still significant?
A t-test is a statistical test used to determine if there is a significant difference between the means of two groups.
In this case, the two groups being compared are first basemen and all other players, and the variable being measured is salary. By performing a t-test, we can determine if there is a significant difference in the average salary between first basemen and all other players.
To perform a t-test, we first calculate the difference in means between the two groups and divide by the standard error of the difference. The standard error takes into account the variability in the sample and the sample size. The result is the t-statistic, which is then compared to a t-distribution with degrees of freedom equal to the sum of the degrees of freedom of the two groups minus 2. The t-distribution gives us the probability of observing a difference as large or larger than the observed difference by chance if the two groups have the same mean. This probability is known as the p-value.
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