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Related Questions
a professor wants to randomly select 4 students to go to the board. she decides to randomly select the third student who enters the classroom and every seventh student after that. determine the students who will be going to the board. write down the student numbers.
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The total number of students chosen is 4, 13, 22, and 31.
What is random selection?Random selection, also known as random sampling, is a method of selecting members of a population to be included in your study's sample. Random assignment, on the other hand, is a method of dividing the sample into control and experimental groups. The goal is to make the results more generalizable. The goal of selecting a random sample from a larger population is to ensure that the sample is representative of the larger group and less likely to be biased.To determine the students who will be going to the board:
The professor wishes to choose four students at random.She then chose the fourth and ninth students at random.The fourth student is chosen first.Now, using the following term formula, a + d (n - 1).
The second student is up next.
= 4 + 9(2-1) = 4 + 9(1)= 4 + 9= 13The third student will:
= 4 + 9(3-1)= 4 + 9(2)= 4 + 18= 22The fourth student will:
= 4 + 9(4-1)= 4 + 9(3)= 4+ 27= 31Therefore, the total number of students chosen is 4, 13, 22, and 31.
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Miguel saves 1/6 of his wage. He spends one third of his wage on his mortgage. How much does he have left ?
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hi
1/3 =2 /6
so 1/6 +2/6 = 3/6
as 3/6 is half if his income, then he remains the other half
show working out I’ll give u brainless if u help mehhhh
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f(x)=2x-3
g(x)=2x³+6
find f(-2) and g(-3)
Answers
Answer:
-7
-48
Step-by-step explanation:
-2*2 = -4. -4-3=-7
-3*-3*-3=-27 -27*2=-54. -54+6=-48
Deanna and Raquel ride a merry-go-round together. Deanna sits on a horse on the outer edge of the merry-go-round, 10 feet from the center of the ride. Raquel sits on a horse that is 2 feet closer to the center than Deanna. This ride makes one full rotation every 15 seconds. When the ride starts spinning, which girl is traveling faster? Explain how you know.
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As Deanna is sitting farther from the center she is travelling at a faster rate.
What is circumference of a circle ?Circumference of a circle is the distance around the circle.
We know that merry-go-round covers distance in form of circles and we also know that circumference of a circle is 2πr.
As Deanna sits on a horse on the outer edge of the merry-go-round, 10 feet from the center of the ride it can thought of as the radius.
∴ In one rotation Denna will cover (2πr) feet which is
= (2π×10 feet.
= 62.8 feet in 15 seconds.
Now if we do the previous calculation for Raquel with r taken as 8 she will cover:
= 50.24 feet in 15 seconds.
Therefore Deanna is spinning at a faster speed.
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In triangle PQR,work out the values of a ,b and c.Give your reason for you answer .
Answers
Answer:
m∠a = 100°
m∠b = 100°
m∠c = 110°
Step-by-step explanation:
Calculation of m∠a
∠a is an exterior angle of ΔPST .
Therefore m∠a = sum of the interior angles of ΔPST
m∠a = 30 + 70 = 100°
Calculation of m∠c
∠c and ∠PST are supplementary so their measures must add up to 180°
m∠c + 70° = 180° so m∠c = 180 - 70 = 110°
Calculation of m∠b
QRST is a quadrilateral.
The sum of the interior angles of the quadrilateral = 360°
So m∠a + m∠b + 50 + m∠c = 360°
We have already computed ∠a = 100° and ∠c = 110°
So 100 + m∠b + 50 + 110 = 360°
260 + m∠b = 360
m∠b = 360 - 260 = 100°
How would I solve these problems
Answers
Answer:
1a. -( x + 1)² + 4
1b. y-intercept at y = 3
1c. x-intercepts at x = -3 and x = 1
Derivation of 1b and 1c below
Step-by-step explanation:
Question 1a
The vertex equation form of a parabola is given by
y = a(x-h)² + k where (h, k) are the coordinates of the vertex
If a > 0 then the parabola is facing up(vertex is at a minimum) and if a < 0 then parabola is facing down (vertex at a maximum)
From the graph we see that the parabola is facing down so a = -1
The vertex is at (-1, 4) so h = -1 and k = 4
Therefore the equation of the parabola is
y = -1(x - h)² + k = -1(x- (-1))² + 4 = -1(x + 1)² + 4
y = -( x + 1)² + 4 (Answer 1a)
Question 1b
The y-intercept is the y-value where the parabola crosses the y-axis. From the graph we see that the parabola crosses the y-axis at y = 3 and x = 0
So y-intercept from the graph is 3
To solve algebraically, set x = 0 in the parabola equation and solve for y
We get, for x = 0,
y = - (0 + 1)² + 4
y = -(1²) + 4 = -1 + 4 = 3
Hence verified
Question 1c
There will be two x-intercepts for a parabola. Looking at the graph we see that the parabola intersects the x-axis at two points (-3, 0) and (1, 0). So the two x-intercepts are -3 and 1
Algebraically we can determine the x-intercepts by setting y = 0 and solving for the two values of x
Setting y = 0 in the parabolic equation, we get
y = 0 = -(x + 1)² + 4
Switch sides
-(x + 1)² + 4 = 0
-(x + 1)² = -(x² + 2x + 1) = -x² -2x - 1
-(x + 1)² + 4 = 0
==> -x² -2x - 1 + 4 = 0
==> -x² - 2x +3 = 0
Multiply by -1 both sides
==> x² + 2x - 3 = 0
Solve this quadratic equation by factoring
x² + 2x - 3 = (x - 1)(x + 3) = 0
The solutions are
x - 1 = 0 ==> x = 1
x + 3 = 0 ==> x = -3
Hence verified
a digital scale measures weight to the nearest 0.2 pound which measurement shows an apporpriate level of precision for the scalae brainly
Answers
A. 130.4 pounds shows an appropriate level of precision for the scale
The quantity 0.2 pound represents readability of the digital scale. It is also known by the terms division size or resolution. The number indicates the division in digital scale. The scale division will be 20 in case 0.2 readability. Another example of readability can be understood by more simple divisions. For instance, 1 gram readability can be divided into divisions like 5 or 25 etc.
Capacity, is another term related to digital scale. It refers to the highest amount that can be weighed safely by the digital scale. Precision is defined as the total number of digits in any given number. Among the given options, the option with 4 digits will be the correct option. This is represented in option A. 130.4 pounds. Hence, it shows an appropriate level of precision.
The complete question is -
A digital scale measures weight to the nearest 0.2 pound. Which
measurement shows an appropriate level of precision for the scale?
A.130.4 pounds
B.124.75 pounds
C.125 pounds
D.120 pounds
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Sophia buys 13 bottles of cranberry juice at the corner store for a total cost of $7.02. If each bottle costs the same amount, how much is 14 bottles of juice?
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The cost for 14 cranberry juice bottles would be $7.56
In this question, Sophia buys 13 bottles of cranberry juice at the corner store for a total cost of $7.02
If each bottle costs the same amount, we need to find the amount for 14 bottles of juice.
Let x be the cost of one bottle of cranberry juice.
13 bottles of cranberry juice costs $7.02
So, we get an equation,
13x = $7.02
We solve above equation to find the cost of 1 bottle of cranberry juice.
x = $0.54
By unitary method the cost for 14 cranberry juice bottles would be,
14 × 0.54 = $7.56
Therefore, the cost for 14 cranberry juice bottles would be $7.56
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Please help with explanation
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The perimeter of the sandbox is 2x+2y.
Therefore, the inequality is
[tex]\boxed{2x+2y \leq 20}[/tex]
Simplify:
4(10+2³-5)
O a. 52
O b. 44
O c. 6892
O d. 17
Answers
Answer:
A. 52 is your answer
Step-by-step explanation:
Explained below
Answer:
Ans is a
First you solve the inside of the bracket u will get 4(13)
which will give u 52
How to find the greatest number of identical arrangements that can be made what is 54 roses and 42 tulips or no flowers left over.
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The greatest number of identical arrangements that can be made is 6 arrangements of 7 tulips and 9 roses.
The above problem we can use the greatest common factor, we are provided with the information that there are a total of 42 tulips and 54 roses. Now, we will find the greatest common factor of 54 and 42.
42- 54|2
21- 27 | 3
7 - 9
So the greatest common factor of 54 and 42 is 6, here we are left with 7 and 9 which indicates the number of tulips and roses
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a racetrack charges $80 each seat in the lower section, $65 for each seat in the upper sections, and $30 for field tickets. there are three times the number of seats in the upper section as compare to the lower section. the revenue from selling all 21,200 seats is $915,000. how many of each ticket were sold at the racetrack?
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The number of each ticket sold was:
The upper section contains 5160 seats, the lower section contains 1720 seats, and the field contains 17320 seats.Given Information:
Each seat in the lower section costs $80, each seat in the upper section costs $60, and field tickets cost $40.The upper section has three times the number of seats as the lower section.The total revenue from the sale of all 24,200 tickets is $1,140,000.The steps below can be used to calculate the total number of seats in each section:
Step 1 - In the lower section, enter 'x' as the total number of seats.
So, based on the data provided, the total number of seats in the upper field is '3x'. Let y be the total number of seats in the field.Step 2 - The linear equation that represents total ticket revenue.
80x + 60(3x) + 40y = 1140000260x + 40y = 1140000 ...(1)Step 3 - The linear equation representing the total number of tickets is as follows:
x + 3x + y = 24200y = 24200 - 4x ...(2)Step 4: Change the value of y in the equation (1).
260x + 40(24200 - 4x) = 1140000x = 1720 ticketsStep 5: Change the value of 'x' in equation (2).
y = 24200 - 4(1720)y = 17320 ticketsTherefore, the number of each ticket sold was:
The upper section contains 5160 seats, the lower section contains 1720 seats, and the field contains 17320 seats.Know more about linear equations here:
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The correct question is given below:
A racetrack charges $80 for each seat in the lower section, $60 for each seat in the upper section, and $40 for field tickets. There are three times the amount of seats in the upper section as the lower section. The revenue from selling all 24,200 tickets is $1,140,000. write a system to represent the situation. How many seats are in each section
25 POINTS PLEASE HELP
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Answer:
Step-by-step explanation:
Twice the difference of a number and 2 is greater than or equal to 16
Answers
Answer: n>=10
Step-by-step explanation:
n=number
2(n-2)>=16
2n-4>=16
2n>=20
n>=10
Answer:
[tex]2(x-2)\geq 16[/tex]
[tex]2x-4\geq 16[/tex]
[tex]2x\geq 20[/tex]
[tex]x\geq 10[/tex]
Step-by-step explanation:
11. There are 8 fluid ounces in one cup. If you
double the amount of fluid ounces, will the
amount of cups also double? Write an
argument that can be used to defend your
solution.
Answers
Answer:
Yes
Step-by-step explanation:
Imagine you have 1 cup. It’s 8 oz. Then imagine someone came up and doubled the # of ounces you have. Now you have 16 oz or 2 cups. 2 cups is double one.
This isn’t a good explanation, sorry lol
But honestly, just think of it as a fraction, what you do to the top, you do to the bottom. As long as you do the same thing to the cups that you did to the ounces, the cups and ounces will remain proportional.
Write the equation of a quadratic function in standard form for the parabola that passes through the given points.
(1,5), (4,0), (5,7), (1,9), (3,5), (0,8)
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Answer:
5,7 given point its korrect now
10. Faye wrote a list of values in descending order, but one of the values was erased as shown.
Which of the following could be the missing value?
b. 60%
c. 5.8
d. √23
31.12√26
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The erased value in the descending order series is 5.8 so option (C) will be correct.
What is a series?A series follows some pattern for example if you take data set of natural numbers then there will be a sequence of that data and something will be due to that we can form that series.
Given the descending order series ;
31/5,---- 5 1/2, √26
Since the series is descending its means every next term must be smaller than the previous.
In the given option
6 1/4 = 6.25 and 31/5 = 6.2 so 6.25 > 6.2 so it will not the missing term.
60% refers to 0.60 but 5 1/2 > 0.60 so it is also no solution.
5.8 < 6.2 and 5 1/2 < 5.8 so it will be the solution.
Last √23 = 4.795 but 5 1/2 > 4.795 so it will also not solution.
Hence "The erased value in the descending order series is 5.8".
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bro's please help like fr I don't know WHAT IS 4 1/4 TIMES 6 AND PLAESE GIVE ME BOTH SIMP AND NOT THANK YOU <33
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Answer:
Exact Form:
51/2
Decimal Form:
25.5
Mixed Number Form:
25 1/2
Step-by-step explanation:
What is the distance from the origin to point P graphed on the complex plane below?
4
3
2
4
-5-4-3-2-₁
√√7
√29
7
20
-2-
34 32 4
Mark this and return
2 3 45 x
Save and Exit
Next
Submi
Answers
Step-by-step explanation:
the point is (2, -5).
the origin is (0, 0).
the distance between 2 points is calculated via Pythagoras due right-angled triangles :
c² = a² + b²
c is the Hypotenuse (the side opposite of the 90° angle). a and b are the legs.
the direct distance is the Hypotenuse, and the x coordinate and y coordinate differences are the legs.
so,
distance² = (2 - 0)² + (-5 - 0)² = 2² + (-5)² = 4 + 25 = 29
distance = sqrt(29) = 5.385164807...
so, the second answer option is correct.
in a random sample of 77 residents of the state of texas, the mean waste recycled per person per day was 1.01.0 pounds with a standard deviation of 0.290.29 pounds. determine the 98�% confidence interval for the mean waste recycled per person per day for the population of texas. assume the population is approximately normal. step 1 of 2 : find the critical value that should be used in constructing the confidence interval. round your answer to three decimal places.
Answers
Answer:
(0.63789 ; 1.38211 ) is the 98% confidence interval for the mean waste recycled per person per day for the population of texas and Tcritical = 3.143
In a random sample of 7 residents of the state of texas ,the mean waste recycled per person per day was 1.01 pounds and standard deviation 0.29 pounds
we have to find the 98% confidence interval for the mean waste recycled per person per day for the population of texas
Mean, xbar = 1.01
Standard deviation, s = 0.29
Sample size, n = 7
Confidence interval : xbar ± margin of error
Margin of Error = Tcritical * s/sqrt(n)
Degree of freedom (df) = n - 1 = 7 - 1 = 6
Hence Tcritical = 3.143
Margin of Error = 3.143 * 0.29/sqrt(6)
Margin of error = 0.37211
Lower boundary = (1.01 - 0.37211) = 0.63789
Upper boundary = (1.01 + 0.37211) = 1.38211
(0.63789 ; 1.38211 )
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Arthur is 7 years older than his brother. In 8 years, Arthur will be twice his brother's current age. How old is Arthur now?
Answers
Answer:
15 years old
Step-by-step explanation:
Answer: 22
Step-by-step explanation:
this problem is solved by a system of equations
Let Arthur’s current age be represented by:a
His brother’s current age will be represented by: b
The first equation will be:
a = 7 + b
The second equation will be:
a + 8 = 2b
now we solve for the equations. Plug in a = 7+b into a in the second equation.
So now we have
b+7+8=2b
Simplify:
B+15=2b
15=b
We aren’t done yet though
Arthur’s brother is 15 years old but since he is 7 years older we need to add 7 to 15
Hence, Arthur is 22 years old.
barry is going to post-secondary school for three years. should barry get a student loan or personal line of credit to pay for his education? why?
Answers
Since Barry is going to post-secondary school for three years, a personal line of credit is vital to pay for his education.
How to illustrate the information?It should be noted that when a individual collects a loan, the person will have to pay it back with an extra amount as interest.
In this case, it's important for him to use his personal line or credit rather than collecting a student loan from people. This isn't good in this scenario.
Therefore, since Barry is going to post-secondary school for three years, a personal line of credit is vital to pay for his education.
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Insert <,>,or = to make the following sentence true. square root of 17 and 4
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we can insert > to make the following sentence true that is [tex]\sqrt{17}[/tex] > 4
we have to solve the following sentence
[tex]\sqrt{17}[/tex] --- 4 ( insert <,>, = to make the following sentence true)
what is square root ?
The square root of a number is the factor that we can multiply by itself to get that number. The symbol for square root is [tex]\sqrt{}[/tex] .
we know that
square root of 17 is 4.12310563
which is 4+ 0.12310563
that is if we add 4+0.12310563 we get 4.12310563
therefore square root of 17 is greater than 4
that is [tex]\sqrt{17}[/tex] > 4
since 4.12310563 > 4
hence, we can insert > to make the following sentence true that is [tex]\sqrt{17}[/tex] > 4
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A triangle has height of 15 in. And area 120^2 . What is the length of its base
Answers
Answer:
16 inches
Step-by-step explanation:
Multiply 120 by 2 to start reversing the triangle area equation.
120*2 = 240.
Now divide by 15
240/15=
16
The length is 16 inches
Speed and travel time are inversely related, the faster you go, the less time it takes
to get to your destination. If it takes 20 minutes to get to school when you go 30 mph,
how long will it take to get to school if you travel 45 mph? (hint: speed=k/time)
Answers
Answer:
Step-by-step explanation:
speed = distance/time
however speed is a compound measure
distance to school = speed x time
= 30mph x 1/3hr
= 10m
time = 10m / 45mph
= 13.3 (recurring)
= 13 mins
How to understand algebra 1 dot plots
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We can understand dot plot by taking example of be the choice of foods that you and your friends ate for snacks.
A dot plot is a type of graphical display that uses filled circles (dots) and a simple scale to compare counts (frequencies) within a category or group when working with small data sets with few groups . A chart with letters or words (non-numeric categories) on the x-axis is called a qualitative dot plot. The dot plot above is a qualitative dot plot because A, E, I, O, and U are not numeric. Qualitative variables cannot be described in terms of center, spread, or shape. If the x-axis contains numbers (numerical categories), it is called a quantitative dot plot. This dot plot can be described in terms of center, spread, or shape.Dot plots are used to represent small amounts of data. To analyze this chart, let's say four people are having a snack together. Snack selections are pizza, burgers, fries, and pasta. Using the dot plant, we can see that everyone chose pizza. Also, her 3 other people in your group added burgers to their snack plates. The graph also shows that two people in the group added French fries and one person in the group added pasta to their meal.
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A scientist created a scatter plot to represent the heights of four plants over time. Then, she found a line of best-fit to model the height in centimeters of each plant after x days. The equations of each trend line are given in the table.
Trend Line Equations
Plant
Equation of trend line
1
y = three-halves x + three-halves
2
y = 2 x + 1
3
y = one-half x + 3
4
y = three-halves x + 1
According to the trend line equations, which plants are growing at the same rate per day?
Answers
The plants which are growing at the same rate are Plant 1 and Plant 4.
Both the plants are growing at the same rate because they have same slope when their growth rate is expressed in the form of equation. Slope may be defined as the amount of steepness of the graph when plotted on graph paper. The slope-intercept form of equation of line is given by y = mx + c where m is the slope of the line and c is the intercept formed by the line. The slope-intercept form of the growth rate equation of Plant 1 is given by y = 3/2x + 3/2 and the slope-intercept form of the growth rate equation of Plant 4 is given by y = 3/2x + 1.
If we compare them from the slope-intercept form of line, then both the Plants have same slope and thus their growth rate is same.
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Answer:
B. 1 and 4
Step-by-step explanation:
Edge 2023
Subtract using a number line.
-3.3-(-0.6)
Plot the minuend and, the difference on the number line.
Answers
Answer:
2.7
Step-by-step explanation:
When you subtract a negative number, you are actually adding because the negatives cancel out. So, it will be -3.3+0.6, which is -2.7
hope this helps! ibrahim
Hi there! Your answer is 2.7
Step-by-step explanation:
Add: -3.3+-0.6 = 2.7
When subtracting two negative numbers, this will result in a positive number since the negatives cancel each other out.
Hope this helps! :)
If f(x) = -2x - 3 and g(x) = x^2 5x what is f(-1)
Answers
Answer:
it's -2/67x12w<3(xyz)