The people who are interviewed constitute a convenience sample.
If the survey company is interviewing anyone who is available in the shopping mall without using any systematic method for selecting the participants, it would be considered a convenience sample.
In a convenience sample, the sample is selected based on ease of access to the participants, and it may not be representative of the entire population. This type of sampling can lead to bias in the sample, as the views of people who happen to be available in the mall at the time may not be representative of the views of the entire population.
To know more on convenience sample
https://brainly.com/question/1413932
#SPJ4
how do you find the answer to this super hard question which is,
2(1/3^2)
Step-by-step explanation:
Square the 3 first, which gives you 9 (use the 9 as the denominator), then do 2 X 1/9. Which leaves you with 2/9
how to calculate multiplier in economic
Answer:
1/1-mpc and 1-mps
Step-by-step explanation:
to get the multiplier effect you use the formula
M=1/1-MPC
A device for training astronauts and jet fighter pilots is designed to rotate a trainee in a horizontal circle of radius 12.0 m. If the force felt by the trainee on her back is 7.85 times her own weight, how fast is she rotating? Express your answer in both m/s and rev/s
The velocity of the trainee is 94.2/m m/s and 0.15 x m rev/s.
The centripetal force (Fc) felt by the trainee can be calculated using the following equation:
Fc = mv2/r
Where m is the mass of the trainee, v is the velocity and r is the radius of the circle.
Therefore, the velocity (v) required to produce a centripetal force of 7.85 times the mass of the trainee can be calculated as follows:
v =√(Fc x r/m)
=√(7.85 x 12.0/m)
=√(94.2/m)
For a given mass, the velocity is therefore 94.2/m m/s.
Converting to revolutions per second (rev/s), the velocity can be calculated as follows:
v = (2πr)/T
= (2π x 12.0)/(94.2/m)
= (14.14 x m)/94.2
= 0.15 x m rev/s
Therefore, the velocity of the trainee is 94.2/m m/s and 0.15 x m rev/s.
Learn more about velocity here:
https://brainly.com/question/29253175
#SPJ4
a system of linear equations that do not rely on each other for the algebraic or graphic form of the equation
Independent system of linear equations that do not rely on each other for the algebraic or graphic form of equations.
The collection of two or more linear equations involving the same variables is known as a system of linear equations. The number of orders in a system of linear equations can range from one to n.
If a consistent system only has one solution, it is regarded as independent.
Elimination or substitution are two algebraic methods for solving a system of linear equations. and was also graphically solved.
Hence Independent system of linear equations that do not rely on each other for the algebraic or graphic form of equations.
to more learn about click here.System of linear equations.
https://brainly.com/question/20379472
#SPJ4
a rectangular field is to have 100 m2 in area. it was enclosed by fence. the north south sides costs $20/m, east-west sides cost $5/ m. what are the dimensions so that the cost is a minimum?
The dimensions of the rectangular field with a minimum cost are x = 50 m and y = 2 m.
Let x be the length of the north-south sides and y be the length of the east-west sides.
The area will be given by: A = xy
The cost will be given by: C = 20x + 5y
We have to find the dimensions (x and y) that minimize the cost C subject to the constraint that the area A is 100 m2.
Using the constraint, we have:
A = xy = 100
We can solve this equation for one of the variables in terms of the other, say x in terms of y.
We get: x = 100/y
Substituting this into the cost equation, we get:
C = 20(100/y) + 5y
Differentiating this equation with respect to y and equating it to 0, we get:
dC/dy = 20/y2 - 5 = 0
or, y2 = 4
or, y = ±2
We choose the positive value for y, so y = 2
Substituting this value of y in the equation for x, we get:
x = 100/2 = 50
Therefore, the dimensions of the rectangular field with a minimum cost are x = 50 m and y = 2 m.
Learn more about dimensions here:
https://brainly.com/question/15311637
#SPJ4
What is the total displacement of the car after 5 h? question 8 options: 0 km 15 km 20 km 40 km.
The total displacement of the car after 5hrs is 0km.
Displacement is a vector quantity that refers to the object's overall change in position.changing in final position from its initial positioncalculating the distance between an object's initial position and its final position.In physics terms, displacement is referred to as the variables. The displacement formula is as follows:s =sf– si
where, s = displacement.
In the given graph, there is the change in distance covered with the time that is:
after two hours car reaches 15 km away from the initial pointafter 4 hours it reaches 20 km away from the initial pointAfter 5 hours car returns back to the initial point.Thus, the displacement will be 0 km as the final point and initial point are the same.
Read more about displacement:
https://brainly.com/question/28370322
#SPJ4
Your shifts productivity is slow because one person is not pulling his shares. the rest of the team is getting upset. what should you be most and least likely to do?
Some please help me with this: 2y - z + z^2
2y - z + z^2 is an algebraic expression. It represents a mathematical operation that includes three different terms: 2y, -z and z^2. It can be simplified depending on the context and the values of y and z.
In the given expression, 2y is the coefficient of y, which is multiplied by y. -z is subtracted from 2y and z^2 is added to the result.
In order to simplify this equation, you could combine like terms, which means combining the same variable or powers of the same variable with each other.
This expression does not have any like terms, so it can't be simplified anymore.
It can be evaluated by replacing y and z with specific values and then performing the mathematical operations in the given order.
the purpose of this lab is to find several types of samples given a population. your population is described below: population: the 24 students in a math 152 class. the following is the seating chart for the class. when choosing your sample only use the subject id not their name. describe how you found the sample fully including the technology you used and all steps you took.
To select a sample from the population of 24 math 152 students, I used stratified random sampling.
Stratified random sampling is when a population is divided into groups or strata, then a random sample is taken from each group. In this case, the population of 24 students was divided into two groups of 12. The first group was selected by randomly assigning each student a number from 1-12, then I used a random number generator to choose numbers from 1-12. The numbers that were chosen were the subjects for the first group. I repeated this process for the second group of 12, assigning each student a number from 13-24, then using the random number generator to choose the subjects for the second group. I repeated this process until I had a sample of 10 students. This process allowed me to create a sample that was representative of the entire population.
Learn more about stratified random sampling here:
https://brainly.com/question/29852583
#SPJ4
Have a conversation with your guardian regarding monthly expenses/budget in different sectors and represent the information in pie chart and frequency curve
Therefore , the solution of the given problem of pie chart comes out to be the amount he spent on living expenditures was $1634.5.
Define pie chart.A pie chart, also known as a circle chart, is a visual representation of the various values of a given variable or a way to summarize a set of nominal data (e.g. percentage distribution). This kind of chart consists of a circle with numerous segments. Each segment stands for a specific category.
Here,
living expenses are 35% of the monthly budgeted income of $4670.
Next, we must utilize the rule of four:
4670 $ => 100%
x=> 35%
Clearing x:
=> x=(35/100)*(4670)
=> x=1634.5$
The amount he spent on living expenditures was $1634.5.
Therefore , the solution of the given problem of pie chart comes out to be the amount he spent on living expenditures was $1634.5.
To know more about pie chart , visit
https://brainly.com/question/30145769
#SPJ1
Harley has 6 pints of lemonade. Rosie has 3 times as many pints of
lemonade as Harley.
a) How many pints of lemonade does Rosie have?
b) How many more pints of lemonade does Rosie have than Harley?
Give your answers as whole numbers or as fractions in their simplest form.
Answer: So in order to get a) you need to multiply 3 times 6 because Rosie has 3 times more pints than Harley so you would get 18. And to find b) you need to subtract the 6 from the 18 and you get 12. Rosie has 12 more pints than Harley.
Step-by-step explanation:
State the center point and radius of the circle. Write the equation of the circle in standard and general form.
The equation of the circle is [tex](x-2)^2+(y+1)^2=16[/tex].
What is equation of the circle?
A closed curve that is drawn from a set point known as the center and has all of its points at exactly the same distances from it is termed a circle. The formula for a circle with the coordinates (h, k) in its center and radius is [tex](x-h)^2+(y-k)^2=r^2[/tex]
This represents the equation's conventional form. As a result, the equation for the circle is simple to find if we also know the coordinates for the radius of the circle.
Here according to the graph the center of the circle is (2,-1) and radius of the circle = 2+2=4 unit.
Now using circle equation then
=> [tex](x-p)^2+(y-q)^2=r^2[/tex]
Where p=2 , q=-1 and r=4 then
=> [tex](x-2)^2+(y-(-1))^2=4^2[/tex]
=> [tex](x-2)^2+(y+1)^2=16[/tex]
Hence the equation of the circle is [tex](x-2)^2+(y+1)^2=16[/tex].
To learn more about circle equation refer the below link
https://brainly.com/question/1506955
#SPJ1
Geometry Unit 4 homework 3
Solve for x.
Answer: The answer is x = 34
Step-by-step explanation: The first triangle shows that the first angle is 84 and 36 which equals 120. Since both triangles are the same the second triangle also has to equal 120. Since you know this you simply subtract 86 from 120 which gives you 34.
Hope this helped
What single factor made the Hindu arabic number system superior
Invention of 0
What are the two purposes of numerals or digits
Show the cardinal value (how many)
And show the place value (10s, 100s, 1000s)
Natural numbers in a counting process
Does not include 0
1-2-3-4-5-6-7-8-9-10-11- infinity
Principle of closure
Addition- if you add any two natural numbers, the result will always be a natural number. Called closed under addition
Multiplication- if you multiply any two naturals, you get naturals. Called closed under addition
Subtraction- you cannot achieve closure when subtracting larger number from smaller number (i.e. 6-7)
Division - when you divide two natural numbers, it is possible to get a fraction. Not closed by division.
Integers
Positive and negative numbers, start at 0 and expand infinitely at both ends.
Closed under addition, multiplication, subtraction. NOT DIVISION
Rational numbers
Numbers that can be expressed as fractions, that is the quotient of two integers
Irrational numbers
Non terminating, repeating decimals
Three axioms of equality
Reflexive- law of identity. Any number reflects itself or is equal to itself (i.e. A=A)
Symmetric- any equality is reversible (i.e. A=B, then B=A)
Transitive property - possible to identity two numbers as being equal to a third quantity (a=b and b=c then a=c)
Commutative property
When adding, it doesn't matter the order
a+b=b+a
Order in which things are multiplied does not affect product (a*b=b*a)
Associative property
Law states that the order in which Addends are grouped, the sum will be unaffected. (a+b)+c = a + (b+c)
(A*b)*c = a(b*c)
Distributive property
Multiplication can be distributed over addition.
a(b+c)= (a*b) + (a*c)
Unity element
Number 1 is the identity element of multiplication. Any number multiplied by one equals itself
Zero element
Identity element for addition
Will destroy number, anything multiplied by 0 =0
Dividing by 0 is error.
0 /# = 0
The Hindu-Arabic numeral system is superior to other numeral systems because of its invention of the number 0. This allows for the representation of the concept of nothingness or absence, which allows for the development of more advanced mathematical operations such as negative numbers and decimal fractions.
The two purposes of numerals or digits are to show the cardinal value (how many) and to show the place value (10s, 100s, 1000s). The cardinal value is the actual quantity of a number, while the place value is the position of a digit in a number, which determines its value in relation to other digits.
The natural numbers are the numbers used in a counting process and do not include 0. They include the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and so on to infinity. The principle of closure is the idea that certain operations, such as addition and multiplication, will always result in a natural number when performed on natural numbers. However, subtraction and division do not result in natural numbers in all cases.
Integers are positive and negative numbers that start at 0 and expand infinitely in both directions. They are closed under addition, multiplication, and subtraction. However, division is not closed under integers.
Rational numbers are numbers that can be expressed as the quotient of two integers. Irrational numbers are non-terminating, non-repeating decimals.
The three axioms of equality are the reflexive property (A = A), the symmetric property (if A = B, then B = A), and the transitive property (if A = B and B = C, then A = C).
The commutative property states that the order of the numbers does not affect the result in operations such as addition and multiplication. The associative property states that the grouping of numbers does not affect the result in operations such as addition and multiplication. The distributive property states that multiplication can be distributed over addition.
The unity element for multiplication is the number 1, which serves as the identity element for multiplication. The zero element for addition is 0, which serves as the identity element for addition. Dividing by 0 is an error and not allowed.
To know more about Hindu-Arabic , click here:
brainly.com/question/1542814
#SPJ4
[BRAINLIEST FIRST PERSON THAT ANSWERS (CORRECT ANSWER)] : The minutes hand of a circular clock is 10.5" long. The arc distance moved by the minute hand from 2pm to 4:45 pm is:
Check the picture below.
so, let's notice the angle made by the hand from 2pm to 4:45pm, well, it goes around twice, 2 revolutiions, then it goes 270° more after that, and we know the "radius" is 10.5"
[tex]\textit{arc's length}\\\\ s = \cfrac{\theta \pi r}{180} ~~ \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ \theta =\stackrel{360+360+270}{990~\hfill }\\ r=10.5 \end{cases}\implies s=\cfrac{(990)\pi (10.5)}{180} \\\\\\ s=\cfrac{231\pi }{4}\implies s\approx 181.43~in[/tex]
I got a word problem for you maths people that I need help with
Answer: sometimes
Step-by-step explanation:
pleaaase help i’ll give brainliest to whoever provides an explanation for their answer
The measure of the angle subtended at the center of this circle is 78°.
What are the circumference and diameter of a circle?The circumference of a circle is the distance around the circle which is 2πr.
The diameter of a circle is the largest chord that passes through the center of a circle it is 2r.
We know the angle subtended at the center of a circle is twice the measure of any angle subtended at any point of the circumference of the circle.
Given, The measure of the angle subtended at the circumference of this circle is 39°.
Therefore, The measure of the angle subtended at the center is,
= (2×39)°.
= 78°.
learn more about circles here :
https://brainly.com/question/29142813
#SPJ1
The triangle below has a total perimeter of 450 cm: picture of a triangle with sides 128 and 150. Third side unknown Write an equation and solve it to find the length of the longest side of the triangle. (1 point)
For the given perimeter and side length of the triangle , the equation and the measure of the longest side length of the triangle is given by :
Equation : x + 278 = 450 and side length = 172cm.
As given in the question,
The given measurements of the triangle are :
Perimeter of the triangle = 450cm
Measure of the two side length are :
Side length 1 = 128 cm
Side length 2 = 150 cm
let 'x' be the measure of the longest side length of the triangle we have,
Perimeter of the triangle = Side length 1 + Side length 2 + side length 3
⇒ 450 cm = 128 + 150 + x
⇒ 450 = 278 + x
Equation to represent the relation :
x + 278 = 450
Measure of the longest side of the triangle is :
⇒ x = 450 - 278
⇒ x = 172 cm
Therefore, the equation and the measure of the longest side length of the triangle with given perimeter and other side length is equal to
Equation : x + 278 = 450 and side length = 172cm.
Learn more about triangle here
brainly.com/question/2773823
#SPJ4
In the diagram, ABCD is a square. Point E is the midpoint of AD. Points F and G lie on CE, and H and J lie on AB and BC, respectively, so that FGHJ is a square. Points K and L lie on GH, and M and N lie on AD and AB, respectively, so that KLMN is a square. The area of KLMN is 99. Find the area of FGHJ.
Answer:
Step-by-step explanation:
Pull FG together, and assume FG is 11. HJ, must be the same as FG, so it is 11. Our answer is 121.
72 in. = ? cm? i cant solve it please helppppp
Answer: 72 in = 182.88cm
Step-by-step explanation:
(a) A parallelogram has base (2x - 1) metres and height (4x-7) metres.
The area of the parallelogram is 1 m².
(i) Show that 4x² - 9x +3=0.
Answer (a)(i)
“please show steps and thank you”
Answer:
See below.
Step-by-step explanation:
[tex]\boxed{\begin{minipage}{4 cm}\underline{Area of a parallelogram}\\\\$A=bh$\\\\where:\\ \phantom{ww}$\bullet$ $b$ is the base. \\ \phantom{ww}$\bullet$ $h$ is the height.\\\end{minipage}}[/tex]
Given:
[tex]b = (2x - 1)\;\sf m[/tex][tex]h = (4x - 7)\;\sf m[/tex][tex]A=1\;\sf m^2[/tex]Substitute the expressions for b and h and the value of A into the formula for area:
[tex]\implies 1=(2x-1)(4x-7)[/tex]
[tex]\implies (2x-1)(4x-7)=1[/tex]
Expand the brackets:
[tex]\implies 8x^2-14x-4x+7=1[/tex]
[tex]\implies 8x^2-18x+7=1[/tex]
Subtract 1 from both sides of the equation:
[tex]\implies 8x^2-18x+7-1=1-1[/tex]
[tex]\implies 8x^2-18x+6=0[/tex]
Factor out 2 from the left side:
[tex]\implies 2(4x^2-9x+3)=0[/tex]
Divide both sides by 2:
[tex]\implies 4x^2-9x+3=0[/tex]
Hence, showing that 4x² - 9x + 3 = 0.
Math
B8.18 Evaluate a linear function: word problems
c = 18h + 63
4) This equation shows how the cost of renting a moving van depends on how many hours
it is rented for.
The variable h represents the number of hours the moving van is rented for, and the
variable c represents the cost in dollars. For $81, what is the maximum amount of time that a
moving van can be rented for?
Quizzes
DELL
pls help!!
Therefore , the solution of the given problem of equation comes out to be 1 hour is required to generate 81$ .
Clarify Equation.The equal symbol (=) is used to indicate equivalency in a statement for a mathematical model, which combines two statements. In algebra, an equation is a claim that establishes the similarity of two mathematics. The formula 78x + 5 = 14 connects the two numbers, for example. The statements on either face of a letter form a mathematical connection. Typically, the symbol is the lone element and the only variable. For example, 9x – 4 = 2.
Here,
Given :c = 18h + 63
Where c is cost in dollars
and h is hour spend.
Thus ,
To find the maximum amount of time to generate $81
So,
Using equation:
81 = 18h + 63
=> 18h = 81-63
=> 18h = 18
=> h =1
Therefore , the solution of the given problem of equation comes out to be 1 hour is required to generate 81$ .
To know more about equation visit:
https://brainly.com/question/649785
#SPJ1
help! i can’t figure it out
Answer:
15
Step-by-step explanation:
x + 2y
Putting x = 7, y = 4, we have
7 + 2(4)
= 7 + 8
= 15
Hope it helps.
If you have any query, feel free to ask.
Step-by-step explanation:
It's saying x = 7 and y = 4, which means everywhere there is an x, you'll place a 7 and everywhere there is a y, you'll place a 4
x + 2y turns into (7) + 2(4)
Now we can answer the bottom question
2(4) = 8
7 + 8 = 15
so...
If x =7 and y=4, then x+2y= 15
The diagram shows a cuboid ABCDEFGH
ABCD is a square 25cm^2
CG=12cm
Find the volume of the cuboid
Answer:
Step-by-step explanation:
Volume of cuboid = AC x CD x CG. (Cuboid formula is l x b x h)
Now, given, area of ABCD is 25.
Area of square = a² or AC x CD
Therefore, substituting that in the first line, we get,
25 x CG = volume,
or 25 x 12 = 300 cm³. (Given CG is 12cm)
Is Ishmael or Ian correct?
Answer:
Ian is correct
Step-by-step explanation:
The range of a function is the set of all possible values that the function can take. In other words, it is the values of y lying between minimum and maximum
From the graph we can see that the minimum value of y = 0
Maximum value of y = 30
So the range is 0 ≤ y ≤ 30
So Ian is correct
(Note that y ≤ 30 can include negative values which is not possible in this case)
A square and isosceles triangle of equal height are side-by-side, as shown, with both bases on the $x$-axis. The lower right vertex of the square and the lower left vertex of the triangle are at $(10, 0)$. The side of the square and the base of the triangle on the $x$-axis each equal $10$ units. A segment is drawn from the top left vertex of the square to the farthest vertex of the triangle, as shown. What is the area of the shaded region
According to the given statement the area of shaded region is is 20 units squared.
An isosceles triangle is just what?As an outcome, an isosceles triangle has two equal sides as well as two equal angles. As from Greek words iso (same) and skelos, the phrase is formed (leg). Except for a right triangle, which has quadrilateral on all sides, a scalene triangle lacks equal sides on each side.
The slope of the line connecting the bottom right vertex of something like the triangle to the top left vertex of both the square is equal to -1/2.
This line's equation is y = (-1/2)x + 10. (1)
The point at the triangle's top vertex is (15, 10)
The slope of the segment between (10, 0) and (15, 10) is 10/5, which equals two.
The line connecting these two locations has the equation y = 2(x - 10) y = 2x - 20. (2)
You may get the x coordinate of the point where these lines cross by putting (1) = (2)
(-1/2)x + 10 = 2x - 20
30 = [5/2]. x x equals 12 and y equals 2(12) - 20 = 4.
Therefore, the triangle's shaded area's height is 4 and its base is 10.
Its area is therefore (1/2)(4)(10) = 20 units squared.
To know more about Isosceles triangle visit:
https://brainly.com/question/12479957
#SPJ4
devaunte goes to barnes and noble to buy a book that is originally $14.50. devaunte was trying to save money, so he made sure to bring a coupon that gives him 20% off of his book
which expression(s) could you use to solve this problem? select all that apply answers asap i will give brainlyist
Relationship between scale factor,area and volume of enlarged figures
Therefore , area and capacity of volume values equal f2 f 2 and f3 f 3, respectively, if the curve is f, f, and also the rim step size is f, f.
How do you increase volume by increasing the scale factor?When we enlarge a shape by a scale factor, we multiply the area of the shape by the square of the scale factor. When we enlarge a shape by a scale factor, we multiply the volume of the shape by the cube of the scale factor. The scale factor is the proportional relationship that exists between the sides of similar figures.
Here,
Similar geometric shapes' edges, areas, and volumes are also connected to the scale factor.
The peripheral scale factor is f, f if the curve is f, f, and the surface and volume ratios are f2 f 2 but also
f3, f 3, respectively, if the correction factor is f, f.
Therefore , area and capacity values equal f2 f 2 and f3 f 3, respectively, if the curve is f, f, and also the rim step size is f, f.
To know more about volume visit:-
brainly.com/question/1578538
#SPJ1
nine times the sum of a number and 4 is equal to 7
Use the variable w for the unknown number. Write it into an equation
Answer:
9(w+4)7
Step-by-step explanation:
I got this answer too, just like the person before me
determine whether the series is convergent or divergent. 1 + 1 2 2 + 1 3 3 + 1 4 4 + 1 5 5 ⋯
We can see from the provided data that it is obviously divergent.
What in mathematics is convergent and divergent?Convergent sequence occurs when, as n approaches infinity, you arrive at a final as well as constant term through a number of terms. Divergent sequences are those in which individual terms never stabilize; instead, they constantly grow or decrease as n approaches infinity, approaching either infinity or -infinity.
Is divergence equivalent to infinity?A series diverges when it moves up, down, to infinity or minus infinity without settling on a value.
The series' parts are becoming larger and larger while being interrupted by some constant "1" (however they are useless in this situation since the series is divergent because there are always two numbers that follow an intercepting "1" that are greater by 1 than the two that came before it).
To know more about divergent visit:
https://brainly.com/question/28165788
#SPJ4
