The birth order is related to the choice of major. The statistics professor at the university polled his students in finding out the majors and position based on family birth order.
What is statistics?Statistics, a branch of applied mathematics, is concerned with the collection of, description of, analysis of, and inferences from quantitative data. Major contributions to the mathematical theories underlying statistics come from probability theory, linear algebra, and differential and integral calculus.
Finding valid inferences about big groups and general events from the behavior and other observable characteristics of small samples is a major challenge for statisticians, or persons who study statistics. These small samples are representative of a small subset of a larger group or a small number of isolated occurrences of a widespread phenomena.
Almost all scientific fields, including the physical and social sciences, as well as business, the humanities, government, and manufacturing, use statistics. Fundamentally, statistics is an area of applied mathematics that resulted from the application of calculus and linear algebra, among other mathematical techniques, to probability theory.
(a) answer= (113/223) * 100= 50.6725%
(b) answer = (15/43) * 100 = 34.8837%
(c) answer = (15/113) * 100 = 13.27%
(d) answer = (15/223) * 100 = 6.7264%
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Anna does sit-ups to get ready for her first triathlon. When she starts, she does a sit-up every 222 seconds. But, as she gets tired, each sit-up takes longer and longer to do.
Answer:
No, the number of sit-ups Anna does, are not proportional to the time she spends doing them.
Step-by-step explanation:
When Anna starts, she does a sit-up every 22 seconds.
Acme widgets had an order to process 250 widgets. The first unit required 200 minutes to assemble. Before starting, the company estimated the amount of time it would require to assemble all 250 widgets if they learned at an 85% rate. After assembling all 250 widgets, acme realized they had learned at an 80% rate. How much time less than their estimate did acme take? you should be able to compute the answer within plus or minus 2 hours.
91.2 hours less was taken to assemble the parts of the widgets by estimation.
Firstly, we will find out the range:
Using the cumulative unit table to determine the range, we get that-
Range = 88.83 - 61.47
Range = 27.36
Secondly, we will calculate the minutes requires to assemble the widgets.
Number of minutes = 27.36 × 200 minutes
Number of minutes = 5472minutes
Now, we have to calculate how much time less than their estimate did acme take:
Time = 5472 / 60
Time = 91.2
Therefore, we get that, 91.2 hours less was taken to assemble the parts of the widgets by estimation.
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when addition or subtraction is performed, answers are rounded to the least significant decimal place
For addition and subtraction problems, the answer should be rounded to the least significant decimal places as the measurement with the least number of decimal places
The rightmost digit of a decimal number is the least significant digit or least significant figure. Another way to look at the least significant figure is to consider it to be the rightmost digit when the number is written in scientific notation. Least significant figures are still significant.
Count the number of significant figures in the decimal portion only of each number in the problem. Add or subtract in the normal fashion. Final answer may have no more significant figures to the right of the decimal than the least number of significant figures in any number in the problem.
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Solve the inequality and express your answer in interval notation.
x^2-12x+5<0
Answer:
you solve the main number and you can plus the 1+1 the answer is 2 2=2 the main berb on this answer is no
Step-by-step explanation:
jalok
Answer:
The answer is A.
Step-by-step explanation:
make b the subject of p=1/2ab^2+c
The variable b as the subject of the formula is b = √2(p -c)/a
What are expressions?Expressions are mathematical statements that are represented by variables, coefficients and operators
How to make b the subject of the equation?The equation is given as
p = 1/2ab^2 + c
Subtract c from both sides of the equation
So, we have
1/2ab^2 = p - c
Multiply through by 2
ab^2 = 2(p -c)
Divide by a
b^2 = 2(p -c)/a
Take the square root of both sides
b = √2(p -c)/a
Hence, b as the subject of the formula is b = √2(p -c)/a
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Oceanside Bike Rental Shop charges 24 dollars plus 7 dollars an hour for renting the bike. Mike paid 49 dollars to rent a bike. How many hours did he pay to have the bike checked out?
Step-by-step explanation:
24+7 =31 for one hour
so 49-31= 18 remaining 18/7 =2 remainder 4 so now we have 3 hrs but what about the remainder 4?
if 7 is to 60 as 4 is to x then...
7/60=4/x which will give you x=34.29 mins. so he rented the bike for 4 hours and 34.29 mins
In the figure, the radius of the large circle is three times the radius of the small circle. About what percent of the large circle is covered by the small circle?
I NEED THIS NOW PLEEEEEASE!!
The percent of the large circle is covered by the small circle will be 33.3%.
How to calculate the percentage?It should be noted that the radius of the small circle will be r.
The radius of the big circle will be 3r.
Therefore, the percent of the large circle is covered by the small circle will be:
= r / 3r × 100
= 1/3 × 100
= 33.3%
The percent of the large circle is covered by the small circle will be 33.3%.
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ax + bx = c please help I’m so confused
Answer:
[tex]x = \frac{c}{a + b} a = - b[/tex]
Factor completely.
100-9x²
someone help please
Answer:
[tex](10+3x)(10-3x)[/tex]
Step-by-step explanation:
[tex]100-9x^2\\\sqrt{100} =10\\\sqrt{9} =3\\3*-3=-9\\\sqrt{x^2} = x \\(10-3x)(10+3x)[/tex]
________________________________________________________
Considering both terms are perfect squares, factor using the difference of squares formula:
[tex]a^2-b^2=(a+b)(a-b)[/tex]
In this situation, a = 10 and b = 3x. With this, now plug in your data into the formula.
(10 + 3x) (10 - 3x)
_________________________________________________________
Hope this helps! If so, lmk! Thanks and good luck!
2. Which of the following expressions simplifies to -15a + 30?
a. -3(-5a + 10)
b. 5(-3d-6)
c. -15(a + 2)
d. 6(-2.5a + 5)
Answer:
D
Step-by-step explanation:
D, because 6* -2.5a = -15a and 6*5= 30 so it equals -15a+30.
The letters a and b represent nonzero constants. Solve ax+b=41 for x .
The given equation is solved to x as x=(41-b)/a.
The given equation is ax+b=41.
We need to solve the given equation for x.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Now, the equation ax+b=41 can be solved as follows:
Keep the variable x on the left-hand side of the equation and bring a to the right-hand side of the equation.
That is, x=(41-b)/a (when you bring a variable from LHS to RHS or vice versa the mathematical operations become inverse that is multiplication changes to division)
Therefore, the given equation is solved to x as x=(41-b)/a.
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label each quantity as an exact or inexact number. the four bicycles in the family have been ridden for a total of 250 mi. a child fell and had a 4-cm laceration that required 12 stitches.
Both statements can be included in the exact numbers category.
Maple provides two kinds of numbers: exact and inexact. If you do arithmetic with exact numbers (and they aren't too large) the answer that you get back is exactly right. If you do arithmetic with inexact numbers (and they aren't too large or too small) the answer may have a small amount of roundoff error. Although we'll treat this distinction at length in future lessons, it is convenient to take a preliminary look right now.
consider the four bicycles in the family have been ridden for a total of 250 mi.
The above statement can be categorized into exact numbers as 4 and 250 are countable.
Now, consider a child fell and had a 4-cm laceration that required 12 stitches.
The above statement can be categorized into exact as the numbers 4 and 12 are countable.
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A librarian is sorting books. He has 15 crates that are each filled with 22 books. How many books does this librarian have to sort?
Answer:
330
Step-by-step explanation:
15 crates × 22 books each = 330 books
Therefore, the librarian has 330 books to sort.
(ross p1.15) consider a group of 20 people. if everyone shakes hands with everyone else, how many handshakes take place?
190 handshakes take place.
What is Combinations?Combinations are mathematical operations that count the number of potential configurations for a set of elements when the order of the selection is irrelevant. You can choose the components of combos in any order. Permutations and combinations can be mixed up. The sequence in which the chosen components are chosen is crucial in permutations, too. For instance, the arrangements ab and ba are distinct in permutations but equivalent in combinations (regarded as one arrangement).
Combinatorics is the study of combinations, although mathematics and finance are two other fields that employ combinations.
EXPLNATION : For a handshake you need two people. Therefore, select two from twenty, that is, 20C2 ways. It is 20*19/2 = 190.
In general, if there are ’n’ number of people there can be nC2 handshakes.
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Find the measure of the longest angle
The largest angle of the given triangle is 105 degrees. If its measure of other two angles are (6x +17) degrees and (5x + 14) degrees.
According to the given question.
We have, the measure of the angles of a triangle are 105 degrees,
(6x +17) degrees, (5x + 14) degrees.
As we know that the sum of the angles of a triangle is always 180 degrees.
Therefore, we can say that
105 + (6x +17) + (5x + 14) = 180
⇒ 105 + 6x + 17 + 5x + 14 = 180
⇒ 136 + 11x = 180 (adding the like terms)
⇒ 11x = 180 -136
⇒ 11x = 44
⇒ x = 44/11
⇒ x = 4 degrees.
So, (6x +17) degrees = 6(4) + 17 = 24 + 17 = 41 degrees
and, (5x + 14) degrees = 5(4) + 14 = 20 + 14 = 34 degrees
Hence, the largest angle of the given triangle is 105 degrees. If its measure of other two angles are (6x +17) degrees and (5x + 14) degrees.
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1. As c decreases, does the value of x increase, decrease, or stay the same for each equation? Assume c is positive.
Equation | Value of x
x + c = 0 |
—————-|——————
-CX=-C |
—————-|——————
X/C=1 |
The complete statements are:
As c increases in x + c = 0, the value of x decreasesAs c increases in -xc = -c, the value of x stay the sameAs c increases in x/c = 1, the value of x increasesHow to determine the complete statements?
To do this, we evaluate each equation
So, we have
Equation 1
x + c = 0
Make x the subject
x = -c
The above implies that x and c are additive inverses
Hence, as c increases, the value of x decreases
Equation 2
-xc = -c
Divide both sides by -c
So, we have
x = 1
The above implies that c does not have any effect on the value of a
Hence, as c increases, the value of x stay the same
Equation 3
x/c = 1
Make x the subject
x = c
The above implies that x and c have the same value
Hence, as c increases, the value of x increases
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Which expressions are equivalent to 4m-2+(-8m)4m−2+(−8m)4, m, minus, 2, plus, left parenthesis, minus, 8, m, right parenthesis ?
Choose all answers that apply:
Choose all answers that apply:
(Choice A)
A
-2(4m+1) +4m−2(4m+1)+4mminus, 2, left parenthesis, 4, m, plus, 1, right parenthesis, plus, 4, m
(Choice B)
B
2(2m-1)-8m2(2m−1)−8m2, left parenthesis, 2, m, minus, 1, right parenthesis, minus, 8, m
(Choice C)
C
None of the above
Answer:
Ohayooooooooooooooooooooo
A&B
Divide the amount of white sugar by the amount of brown sugar. What is the quotient? 3over 8 ,2over3,2, or 2and 2 3rds
By dividing the amount of white sugar by brown sugar we get, 2 2/3. The quotient is 2.
A fraction is a numerical quantity that is not a whole number. In other words, fraction can be defined as a small or tiny part, amount, or proportion of something.
A fraction represented with its quotient and remainder is a mixed fraction. In other words, a mixed fraction is a combination of a whole number and a proper fraction.
Amount of white sugar ÷ Amount of brown sugar
2/3 ÷ 1/4
2/3 × 4/1
8/3
2 2/3.
Here quotient is 2 and 2 is the remainder.
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h bvv bv
3. The expression 2x+6 is equal to 9 for some value of x. Without finding the value of x, determine the
values for each of the following expressions. Show how you arrived at each answer.
(b) 2x+9
(a) 4x+12
2 (2x+6)
2(a)
18
(d) -6x-18
-3(2x+6)
-3(a)
-27
(e) 2x+1
22460
(c) x+3
26200
(f) 10x+32
in of
Answer:
E, B, 2 = (2x + 6)
Step-by-step explanation:
I think those are correct.
a random sample of 12 tests for two different drugs revealed the following times (in minutes) until the effects of the drug were neutralized.which drug appears to be effective longer?
Drug A is more effective since mean time of effects of Drug A>mean time of effects of Drug B.
What is Random sampling?
Each sample has an equal chance of being picked as part of the sampling procedure known as random sampling. A randomly selected sample is intended to provide a fair reflection of the entire population. Sampling mistake occurs when, for any reason, the sample does not accurately reflect the population.
One of the most straightforward methods for gathering information from the whole population is random sampling. Each member of the subset has an equal chance of being picked as part of the sample process when using random sampling.
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Select the correct answer from the drop-down menu.
Right triangle MNR is represented with the right angle at vertex M. Angle R measures 34 degrees and angle N measures 56 degrees. Point Q lies on segment RN and point P lies on segment MP. Segments MQ and PQ are drawn. Angle MQP measures 56 degrees.
In the figure, sin ∠MQP =
. Plato
The required measure of the sine of angle ∠ MQP for Right triangle MNR is evaluated as 0.83.
As given in the question, the Right triangle MNR is represented with the right angle at vertex M. Angle R measures 34 degrees, and angle N measures 56 degrees.
We have to determine sin ∠MQP.
The angle can be defined as the one line inclined over another line.
Here,
For right-angle triangle MNR,
To calculate the sin of the angle in the right angle triangle we need hypotenuse and perpendicular.
But in the question value of angle ∠MQP is given, So directly,
sin 56 = 0.83.
Thus, the required value of the sine of angle ∠MQP is 0.83.
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Answer:
hlpp
Step-by-step explanation:
Which number line represents the solution set for the inequality 3(8 – 4x) < 6(x – 5)?
A number line from negative 5 to 5 in increments of 1. An open circle is at 3 and a bold line starts at 3 and is pointing to the left.
A number line from negative 5 to 5 in increments of 1. An open circle is at 3 and a bold line starts at 3 and is pointing to the right.
A number line from negative 5 to 5 in increments of 1. An open circle is at negative 3 and a bold line starts at negative 3 and is pointing to the left.
A number line from negative 5 to 5 in increments of 1. An open circle is at negative 3 and a bold line starts at negative 3 and is pointing to the right.
An open circle is at 3 and a bold line starts at 3 and is pointing to the left
Inequality expressionsInequalities are expressions that are not equated by an equal sign. Given the expression below:
3(8 – 4x) < 6(x – 5)
Expand to have:
3(8) - 3(4x) < 6x - 6(5)
24 - 12x < 6x - 30
Collect like terms
-12x - 6x < -30 - 24
-18x < -54
Divide both sides by -18
-18x/-18 < -54/-18
x < 54/18
x < 3
Hence the solution of the inequality on the number line A number line from negative 5 to 5 in increments of 1. An open circle is at 3 and a bold line starts at 3 and is pointing to the left
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leonard can wash 6 cars in 4.5 hours. assuming that he always washes cars at this same rate, answer the following. how many cars can he wash in 9 hours?
how long will it take him to wash one car?
how many cars can he wash in one hour
He wash 12 cars in 9 hours.
And, He take 45 minutes to wash a car.
And, He wash one and one third part of cars in one hour.
Given that;
Leonard can wash 6 cars in 4.5 hours.
He always washes cars at this same rate.
We have to find number of wash cars in 9 hour and time to wash one car and number of wash cars in one hour.
What is relation between hour and minutes?
The relation between hour and minutes is ;
1 hour = 60 minutes.
Now, we have;
Leonard can wash 6 cars in 4.5 hours.
Time for wash 6 cars = 4.5 hour
So, Time for wash 1 car = 4.5 ÷ 6 = 0.75 hour
Since, 1 hour = 60 minutes
Hence, Time for wash 1 car = 0.75 x 60 = 45 minutes
And, In time 4.5 hour, number of wash cars = 6
So, In 1 hour, number of wash cars = 6/4.5 = 1 1/3
Hence, Number of wash cars in one hour is one and one third part of car.
In 9 hour, number of wash cars = (6/4.5) * 9 = 12
Hence, Number of wash cars in 9 hours is 12.
So, He wash 12 cars in 9 hours.
And, He take 45 minutes to wash a car.
And, He wash one and one third part of cars in one hour.
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What is another solution of the equation
x + y = 7?
Enter the correct answer.
The solution of the equation x + y = 7 is equal to (x, y) = (1, 6).
The given equation is of the form of linear equation in two variables. A linear equation in two variables is an equation of the form ax + by c = 0 where a, b and c are coefficients and x, and y are independent and dependent variables respectively.
Now, if we take the equation in the question x + y = 7 and assume (1, 6) as (x, y) then
x + y = 7
Putting (x, y) = (1, 6)
=> 1 + 6 = 7
=> 7 = 7
Thus, we see that L.H.S = R.H.S and thus (1, 6) is the solution of the equation x + y = 7.
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these are the means and standard deviations for samples of building heights in two different cities. city a city b mean: 120 ft mean: 240 ft standard deviation: 20 ft standard deviation: 12 ftselect the two true statements.
The average building height and the standard deviation for two separate cities' samples are shown. The true statements are:
City A’s heights are more spread out than city B’s heights.
City A has a lower average height than city B.
What is average?In daily life, an average is a number chosen to represent a group of numbers; it is often the sum of the numbers divided by the total number of numbers in the group (the arithmetic mean). The average of the integers 2, 3, 4, 7, and 9, for instance, is 5, which equals 25. An average could alternatively be another statistic like the median or mode, depending on the situation. The median is sometimes used in place of the mean since the mean would be unnaturally high if it included the personal incomes of a few billionaires. The median is the amount below which 50% of personal incomes fall and above which 50% of personal incomes rise.
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Emma is planning how much she needs to make next week. She can only work 25 hours, and she needs to make a total of $620. What is the dollar value of sales Emma will need to make?
Answer:
The corrects answer is: Emma will need to make sales totaling $800 next week to meet her goal.
Step-by-step explanation:
Which of the following is a true statement
Solve 0. 504 ÷ 8.
answer choices:
−7. 496
0. 063
0. 630
4. 32
Answer:
0.063
Step-by-step explanation:
0.504 divided by 8 is 0.063
Hope It Helps
Sorry If I'm Wrong
Answer: The answer is 0.630
Step-by-step explanation: The picture proves my answer :D
Julie has $538 in her bank account. On Monday, she withdrew $218 from her bank account. On Friday, she deposited $49 into her
bank account. What is the net change in her bank account balance from before she made her withdrawal on Monday until after her
deposit on Friday?
Answer:
Step-by-step explanation:Before her deposit on Monday, she had $538 now she has, 538 - 218 + 49 = $369 in her bank account after her withdraw on Friday. Hope this helps, best of luck!
Many bank accounts never go below zero. But some banks will allow a negative balance, at least for a short time, called an overdraft. It means someone has taken out, or 'drafted', more money than was in the account to begin with. Mariam's account has gone into overdraft. Her balance is $-20.21. To get back to a positive balance, she plans to deposit money at a steady rate of $20.79 per week. How much will be in her account after 4 weeks?
Using a linear function, it is found that $62.95 will be in her account after 4 weeks.
What is a linear function?A linear function is modeled by:
y = mx + b
In which:
m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.For this problem, we have that:
The initial balance is the intercept.The weekly deposit is the slope.Hence, her balance after x weeks is given by the following function:
B(x) = -20.21 + 20.79x.
Her balance after 4 weeks is given by:
B(4) = -20.21 + 20.79(4) = $62.95.
Hence $62.95 will be in her account after 4 weeks.
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