A 4-digit number contains at least one even digit. How many such numbers are there? Please help me. I will mark brainliest
Answers
Given:
A 4-digit number contains at least one even digit.
To find:
How many such numbers are there?
Solution:
Digits are 0,1,2,3,4,5,6,7,8,9.
Number of odd digits = 5
Number of even digits = 5
4-digit numbers are from 1000 to 9999.
Total number of 4-digit numbers = 9000
Possible ways to get odd digits on all the 4 places is
\(5\times 5\times 5\times 5=625\)
It means 625 numbers are their in which all 4 digits are odd.
To find total 4-digit number that contains at least one even digit, subtract the numbers which contains only odd numbers from the total 4-digit numbers.
\(9000-625=8375\)
Therefore, total 4-digit number that contains at least one even digit is 8375.
Related Questions
I need help with this please
Answers
Answer:
A'(11, -1)
B'(12, -5)
C'(10, -3)
the simplest terms 4x-5(x+3)
Answers
Answer:
Step-by-step explanation:
Have A Wonderful Day!!
Answer: Simplify -x-15
Step-by-step explanation: dbhgiucerherfu
f(x) = log1/9x; translation 8 units right followed by a vertical stretch by a factor of 5
A) g(x)=5log1/9(x-8)
B) g(x)=log1/9 5x-8
C) g(x) log1/9 (5x-8)
D) g(x) 5log1/9 x-40
Answers
Answer: its 7
Step-by-step explanation:
its 7
Jenna has been keeping an eye on an emerald ring she likes. Its original price was
$35,450. After being marked down for a clearance sale, it is now $24,815. By what percent
has the price of the ring gone down?
Answers
Answer: look at the explanation
Step-by-step explanation:
It goes down by 40%
Rewrite the given scalar equation as a first-order system in normal form. Express the system in the matrix form x ′
=Ax+f .
Let x 1
(t)=y(t) and x 2
(t)=y ′
(t). y ′′
(t)−6y ′
(t)−5y(t)=cost Express the equation as a system in normal matrix form.
Answers
The required system in matrix form is:
x' = [x1'(t), x2'(t)]T = [0 1, 5 cos(t) 6][x1(t), x2(t)]
T = Ax + f, where A = [0 1, 5 cos(t) 6] and f = [0, cost]T.
The scalar equation is y''(t) - 6y'(t) - 5y(t) = cost.
We need to express this as a first-order system in normal form and represent it in the matrix form x' = Ax + f.
Let x1(t) = y(t) and x2(t) = y'(t).
Differentiating x1(t), we get x1'(t) = y'(t) = x2(t)
Differentiating x2(t), we get x2'(t) = y''(t) = cost + 6y'(t) + 5y(t) = cost + 6x2(t) + 5x1(t)
Therefore, we have the following first-order system in normal form:
x1'(t) = x2(t)x2'(t) = cost + 6x2(t) + 5x1(t)
We can represent this system in matrix form as:
x' = [x1'(t), x2'(t)]T = [0 1, 5 cos(t) 6][x1(t), x2(t)]
T = Ax + f
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the administration team compiled test results for those who had been tested for strep throat in a random sample of 400 sick patients who had been tested. the following relative frequency table shows the data. positive negative total has the flu 54% 6% 60% does not have the flu 8% 32% 40% total 62% 38% 100% based on the data, what is the ratio of false positives to true positives? 6 over 32 8 over 6 8 over 54
Answers
The ratio of false positives to true positives is 8 over 54.
According to the Question
Results of a strep throat test performed on a sample of 400 ill people are displayed in the table's data. People who have the flu and those who don't are separated into two categories. The patients are then separated into groups based on whether they tested positive or negative for strep throat within each of these categories.
We must first define what a true positive and a false positive are in order to calculate the ratio of false positives to true positives. A patient who tests positive for strep throat but does not actually have the illness is said to have a false positive. The 8% of patients in this instance who tested positive for strep throat but did not have the flu would fall under that category. A patient who tests positive for strep throat and truly has the illness is said to have a true positive. That would be the 54% of patients who tested positive for both the flu and strep throat in this instance.
We divide the percentage of false positives (8%) by the percentage of true positives (54%), which gives us the ratio of false positives to true positives.
As a result, the ratio becomes 8% / 54%, or 8/54.
It's critical to remember that this ratio is dependent on the sample and test performed and may not be the same for different populations or testing methodologies.
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Choose the most appropriate name for the function described below.
The temperature of the coffee depends on the number of minutes it sits on
the desk.
Answers
Answer:
D. Temperature(minutes), or t(m)
Step-by-step explanation:
Option D is the correct answer.
( D.temperature(minutes), or t(m) )
Step-by-step explanation:
We are given that:
The temperature of the coffee depends on the number of minutes it sits on the desk.
i.e. the temperature(t) of coffee is a function of time in minutes (t).
i.e. times is a independent variable and temperature is a dependent variable.
Hence, the most appropriate name for the function described below is:
temperature(minutes), or t(m).
Hence, option D is correct.
Answer:
Temperature is the answer
Step-by-step explanation:
I got it right
Help please guys thankyouu
Answers
You have the right idea so far, but you forgot to finish it up.
Point slope form is
y - y1 = m(x - x1)
where m is the slope, and (x1,y1) is the point the line goes through. As you can see, we have infinitely many choices for (x1,y1). If you use the y intercept point (0,5), then
y - y1 = m(x - x1)
y - 5 = -1(x - 0) ..... this is one of infinitely many possible answers
OR
If you use the point (2,3), then we'd say
y - y1 = m(x - x1)
y - 3 = -1(x - 2) ..... which is another possible answer
There are infinitely many other choices, but I'm only picking the points in which your teacher has shown as big dots.
By the way, nice work on getting the correct answer for the slope-intercept form.
Step-by-step explanation:
(0,5)and (2,3)
\( m = \frac{y1 - y2}{x1 - x2} \\ = \frac{5 - 3}{0 - 2} \\ = - 1 \\ \\ m = - 1 \\ substitude (0,5)or (2,3) \\ substitude \: (0,5)for \: convenience \\ y = - 1x + b \\ 5 = b \\ y = - x + 5\)
Brianliest please~
Simplify the linear expression 4(2b+2)_3
Answers
Answer:
Step-by-step explanation:
=(4)(2b)+ (4)(2)+ -3
=8b+8+ -3
combine like terms:
8b+8+ -3
=(8b) + (8+ -3)
=8b+5
A fan blade rotates with angular velocity given by ωz(t)= γ − β
t2.
Part C If y = 4.65 rad/s and ß= 0.835 rad/s³, calculate the average angular acceleration Cav-z for the time interval t = 0 to t = 3.00 s. Express your answer in radians per second squared. 15| ΑΣ�
Answers
Average angular acceleration Cav-z for the time interval t = 0 to t = 3.00 s is -0.2266 rad/s².
Given data:ωz(t) = γ - βt² = -βt² + γWhere, β = 0.835 rad/s³y = ωz(t) = 4.65 rad/s
To find:Average angular acceleration Cav-z for the time interval t = 0 to t = 3.00 s.
Average acceleration formula is given as:Cav-z = Δω/Δt
We can calculate Δω as follows:Δω = ωf - ωi
Where,ωf = final angular velocityωi = initial angular velocity
Since the time interval is given from t = 0 to t = 3 s, initial angular velocity is:ωi = ωz(0) = γ = constant = 5.33 rad/s
Final angular velocity is given as:ωf = ωz(t) = 4.65 rad/sΔω = ωf - ωi = 4.65 - 5.33 = -0.68 rad/s
Now, we can calculate Δt = 3 - 0 = 3 s
Therefore, the average angular acceleration Cav-z is:Cav-z = Δω/Δt= -0.68/3= -0.2266 rad/s²
Answer:Average angular acceleration Cav-z for the time interval t = 0 to t = 3.00 s is -0.2266 rad/s².
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Roll two fair dice. find p(a |b) where a stands from sum of the two faces is 10 and b stands for two dice are showing different faces. [a] (reduced fraction)
Answers
The probability in the two fair dice problem is given as \(P(A|B) = 1/6\).
How to calculate probability in the two fair dice problem?To find \(P(A|B)\), we first need to find \(P(B)\), which is the probability that two dice are showing different faces.
The total number of possible outcomes when rolling two dice is \(6x6 = 36\). Out of these \(36\) possible outcomes, there are \(6\) outcomes where both dice show the same face (e.g., both dice show a 1). Therefore, there are \(36-6=30\) outcomes where two dice show different faces.
Hence, P(B) = \(30/36 = 5/6\).
Next, we need to find the probability of A and B occurring together, i.e., P(A and B).
The possible pairs of faces that add up to 10 are \((4,6), (6,4),\) and \((5,5)\). Each of these pairs can occur in 2 ways (e.g., the pair \((4,6)\) can occur as \((4,6) or (6,4))\). Therefore, there are 6 ways in total for the sum of two dice to be 10.
Out of these 6 outcomes, only one outcome (the pair (5,5)) violates condition B (i.e., both dice showing the same face). Therefore, there are \(6-1=5\) outcomes where the sum of the two dice is 10 and the two dice show different faces.
Hence, P(A and B) \(= 5/36\).
Using the formula for conditional probability, we can find P(A|B) as:
\(P(A|B) = P(A and B) / P(B) = (5/36) / (5/6) = 1/6.\)
Therefore, \(P(A|B) = 1/6\), which is the required probability.
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PLS HELP(Identifying Functions LC) Which of the following tables represents a relation that is a function?
x y
2 −5
2 −3
2 0
2 3
2 5
x y
−3 0
−1 3
0 4
3 0
4 3
x y
−4 2
−3 2
0 −2
0 2
4 2
x y
−4 −2
−3 4
−1 −1
−1 2
3 −3
Answers
Answer:
Option 2
x y
−3 0
−1 3
0 4
3 0
4 3
Step-by-step explanation:
For a relation x → y to be a function, there can be one and only one value of y for a value of x
Looking at the tables we see that option 1 is out since all x values are 2 andthere are multiple values of y
The last option is out because for x = 0 there are two values of y=-2 and y = 2
Correct choice is the second option which has a unique y value for each value of x
Answer:
option 2 im doing it rn
Step-by-step explanation:
Plz help me
56+(96x3)-34=?
Answers
Use PEMDAS to help you out.
given a nonhomogeneous system of linear equa- tions, if the system is underdetermined, what are the possibilities as to the number of solutions?
Answers
If a nonhomogeneous system of linear equations is underdetermined, it can have either infinitely many solutions or no solutions.
A nonhomogeneous system of linear equations is represented by the equation Ax = b, where A is the coefficient matrix, x is the vector of unknowns, and b is the vector of constants. When the system is underdetermined, it means that there are more unknown variables than equations, resulting in an infinite number of possible solutions. In this case, there are infinitely many ways to assign values to the free variables, which leads to different solutions.
To determine if the system has a solution or infinitely many solutions, we can use techniques such as row reduction or matrix methods like the inverse or pseudoinverse. If the coefficient matrix A is full rank (i.e., all its rows are linearly independent), and the augmented matrix [A | b] also has full rank, then the system has a unique solution. However, if the rank of A is less than the rank of [A | b], the system is underdetermined and can have infinitely many solutions. This occurs when there are redundant equations or when the equations are dependent on each other, allowing for multiple valid solutions.
On the other hand, it is also possible for an underdetermined system to have no solutions. This happens when the equations are inconsistent or contradictory, leading to an impossibility of finding a solution that satisfies all the equations simultaneously. Inconsistent equations can arise when there is a contradiction between the constraints imposed by different equations, resulting in an empty solution set.
In summary, when a nonhomogeneous system of linear equations is underdetermined, it can have infinitely many solutions or no solutions at all, depending on the relationship between the equations and the number of unknowns.
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A math class is having a discussion on how to determine if the expressions 4 x minus x + 5 and 8 minus 3 x minus 3 are equivalent. The class has suggested four different methods.
PLEASE HURRY:Which describes the correct method?
Both expressions should be evaluated by substituting one value for x. If the final values of the expressions are both positive after the substitution, then the two expressions must be equivalent.
Both expressions should be evaluated by substituting with one value for x. If the final values of the expressions are the same, then the two expressions must be equivalent.
Both expressions should be evaluated by substituting any two values for x. If for each substituted value, the final values of the expressions are positive, then the two expressions must be equivalent.
Both expressions should be evaluated by substituting any two values for x. If for each substituted value, the final values of the expressions are the same, then the two expressions must be equivalent.
Answers
Answer:
Both expressions should be evaluated by substituting with one value for x. If the final values of the expressions are the same, then the two expressions must be equivalent.
Step-by-step explanation:
x = 1
4x - (x + 5) = 4 - 6 = -2
8 - 3x - 3 = 8 - 3 - 3 = 2
What is f(2) for the function f(x)=3x+8
F(2)=
Answers
f(2) = 3(2) + 8
f(2) = 6 + 8
Solution: f(2) = 14
a study is being done to test the effects of habitat space on the size of fish populations. four aquariums of of the same size are set up with six goldfish in each one. over a period of six months, the fish are fed the same type and amount of food. the aquariums are equally maintained and cleaned throughout the experiment. the temperature of the water is kept different in each tank. at the end of the experiment the number of surviving fish are surveyed. what is the independent variable?
Answers
The independent variable in this study is the temperature of the water in each tank. The independent variable is the factor that is intentionally manipulated or changed by the researcher in order to observe its effect on the dependent variable. In this case, the researcher is testing the effects of habitat space on the size of fish populations, and they are manipulating the temperature of the water to see how it impacts the survival of the goldfish.
The researcher sets up four aquariums of the same size with six goldfish in each one. The independent variable, temperature, is kept different in each tank. This means that each tank is maintained at a different temperature throughout the experiment.
By manipulating the temperature in each tank, the researcher can observe how the different temperature conditions affect the survival of the goldfish. This allows them to determine whether the size of the fish populations is influenced by habitat space, as measured by the temperature of the water.
To summarize, in this study, the independent variable is the temperature of the water in each tank. The researcher is manipulating the temperature to observe its effect on the survival of the goldfish and determine the impact of habitat space on fish populations.
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x - 62 = 123
How should you show your work to isolate the variable and solve the equation?
Answers
Answer:subtract 72 from the sides
Step-by-step explanation: just because I did it in a quiz got it right
At a local Brownsville play production, 420 tickets were sold. The ticket prices varied on the seating arrangements and cost $8, $10, or $12. The total income from ticket sales reached $3920. If the combined number of $8 and $10 priced tickets sold was 5 times the number of $12 tickets sold, how many tickets of each type were sold?
Answers
Answer:
Number of $ 8 priced tickets = 210
Number of $10 priced tickets = 140
Number of $ 12 priced tickets = 70
Step-by-step explanation:
Framing and solving equations with three variables:
Let the number of $ 8 priced tickets = x
Let the number of $10 priced tickets = y
Let the number of $ 12 priced tickets = z
Total number of tickets = 420
x + y + z = 420 --------------(i)
Total income = $ 3920
8x + 10y + 12z = 3920 ----------------(ii)
Combined number of $8 and $10 priced tickets= 5 * the number of $12 priced tickets
x + y = 5z
x + y - 5z = 0 -------------------(iii)
(i) x + y + z = 420
(iii) x + y - 5z = 0
- - + + {Subtract (iii) from (i)}
6z = 420
z = 420÷ 6
\(\sf \boxed{\bf z = 70}\)
(ii) 8x + 10y + 12z = 3920
(iii)*8 8x + 8y - 40z = 0
- - + - {Now subtract}
2y + 52z = 3920 -----------------(iv)
Substitute z = 70 in the above equation and we will get the value of 'y',
2y + 52*70 = 3920
2y + 3640 = 3920
2y = 3920 - 3640
2y = 280
y = 280 ÷ 2
\(\sf \boxed{\bf y = 140}\)
substitute z = 70 & y = 140 in equation (i) and we can get the value of 'x',
x + 140 + 70 = 420
x + 210 = 420
x = 420 - 210
\(\sf \boxed{x = 210}\)
Number of $ 8 priced tickets = 210
Number of $10 priced tickets = 140
Number of $ 12 priced tickets = 70
in hypothesis testing, the tentative assumption about the population parameter is group of answer choices
Answers
The goal of a hypothesis test is to determine if the data can refuse an assumption a parameter or a population.
Statistical hypothesis test: A statistical hypothesis test is a technique for determining whether the available data are sufficient to support a specific hypothesis. We can make probabilistic claims about population parameters through hypothesis testing.
The purpose of a hypothesis test is to ascertain whether the data can refute a parameter or population assumption.
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Type the integer that makes the following subtraction sentence true: –14 − = –9
Answers
Eight soccer teams participate in a soccer tournament, so that each team plays with every other team exactly once. If one team wins against another, then the winning team gets two points, and the losing team gets zero points. If the two teams tie, then both teams get one point each. After the tournament, the teams are ranked by the total number points each team won. What is the minimum number of points a team must win, to ensure that it is in the top four teams
Answers
Answer:
Step-by-step explanation:
With an eight team round robin, 28 games will be played in total (The total edges in K8). Since each game will produce two points regardless of outcome, 56 total points will be shared among the eight teams. In the absence of a well-defined tie breaking system, we assume that ties do not qualify as a guarantee. We define a team's point total as "ensuring" fourth place when the fifth place team could not possibly have that many points.
Ten points are not enough and eleven points must be enough. In one extreme case, teams A,B,C,D and E all draw each other and win against F,G, and H (who also draw each other), giving a fifth place team with ten points. If we have a fifth place team with eleven points then teams A,B,C,D, and E share at least 55 points, meaning teams F,G, and H share at most one point. However, F,G, and H play each other and must share at least six points, a contradiction. Therefore, 11 points guarantees fourth place at a minimum.
What is the equation of the blue line?
Answers
Answer:
y = -3x - 1
Step-by-step explanation:
pass (-2,5) (0,-1) (1,-4)
use any two points to find the equation
slope (m) = (-1 -5)/(0- -2) = -6/2 = -3
y = mx+b b: y intercept=-1
equation: y = -3x - 1
I have an unanswered question for 50 points right now it's pretty hard but my brother needs help he is almost in tears please I feel so bad for him
Answers
where is the question
Answer:
hi
Step-by-step explanation:
hi
Help me finish the rest of the slope please I will mark Brainly
Answers
Answer:
Slope = 5/2
Step-by-step explanation:
In circle A, diameter EC is perpendicular to chord BD, and arc EB measures 62 degrees. Find the measure of arc ED.
Answers
If in circle A, diameter EC is perpendicular to chord BD, and arc EB measures 62 degrees, the measure of arc ED is 208 degrees.
To solve the problem, we need to use the relationship between arcs, angles, and chords in a circle.
Since diameter EC is perpendicular to chord BD, we know that angle EBD is a right angle.
Arc EB measures 62 degrees, and we know that angle EBD is 90 degrees. Therefore, arc ED must measure:
360 degrees - arc EB - angle EBD
= 360 degrees - 62 degrees - 90 degrees
= 208 degrees
So, the measure of arc ED is 208 degrees.
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in a certain country, the probability that a baby that is born is a boy is 0.52 and the probably that a baby that is born is a girl is 0.48. a family has two children. if x is the number of girls born to a family, find the probability that the family has 0, 1, or 2 girls
Answers
Answer:
The sum of the probabilities of all possible outcomes must equal 1.
Step-by-step explanation:
To solve this problem, we can use the binomial distribution, since we have a fixed number of trials (two children) and each trial has two possible outcomes (boy or girl) with a known probability of success (0.48 for a girl).
Let X be the random variable representing the number of girls born to the family. Then X follows a binomial distribution with parameters n = 2 (the number of trials) and p = 0.48 (the probability of success). The probability mass function (PMF) of X is given by:
P(X = k) = (n choose k) * \(p^{k}\) * \((1 - p)^{(n - k)}\)
where (n choose k) = \(\frac{n! }{(k! * (n - k)!)}\) is the binomial coefficient.
To find the probability that the family has 0, 1, or 2 girls, we need to calculate the values of P(X = 0), P(X = 1), and P(X = 2):
P(X = 0) = (2 choose 0) * \(0.48^{0}\) * \(0.52^{2}\) = 0.2704
P(X = 1) = (2 choose 1) * \(0.48^{1}\) * \(0.52^{1\\}\) = 0.4992
P(X = 2) = (2 choose 2) * \(0.48^{2}\) * \(0.52^{0}\) = 0.2304
Therefore, the probability that the family has 0, 1, or 2 girls is:
P(X <= 2) = P(X = 0) + P(X = 1) + P(X = 2) = 0.2704 + 0.4992 + 0.2304 = 1
Note that the sum of the probabilities of all possible outcomes must equal 1.
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Can someone help me do this
Answers
Answer:
71 degrees
Step-by-step explanation:
It is quite hard to see the question but I believe we are looking for the unknown angle E (correct me if I am wrong and I will revise my answer!)
Please help! The problem is in the picture:
Answers
Answers:
a = 8r = -15%y = 4.9 approximatelyNote: your teacher may want you to type in a positive value for r
=========================================================
Explanation:
The given equation y = 8(1-0.15)^t is in the form y = a(1+r)^t
We have a = 8 as the initial value, or what we start with.
r = -0.15 converts to -15%, so we have a decay of 15%
Plug in t = 3 to find the corresponding value of y
y = 8(1-0.15)^t
y = 8(1-0.15)^3
y = 8(0.85)^3
y = 8(0.614125)
y = 4.913
y = 4.9
Answer:
a = 8
r = 85%
y = 4.913
Step-by-step explanation:
For a, the exponential decay function is y=a*r^t. In order to find the initial amount, you are solving for when t = 0 or, y(0). Thus, t, or time, is 0. Solve the equation with time of 0.
y = 8(1-0.15)^0 = 8*1 (anything to the 0 power equals 1)
a = 8 is the initial amount
In order to solve for r, you need to solve (1 - 0.15) = 0.85. Now, multiply by 100 to get the percent 100 * 0.85 = 85%
Lastly, when t = 3 solve the equation filling in the exponent, t with 3 like below:
y = 8(1-0.15)^3 (PEMDAS; parenthesis and exponents first)
y = 8(0.85)^3 = 8*(0.614125)
y = 4.913
what is (-2)( 3 4/7)
A)-7 1/6
B)-6 6/7
C)-2 3/7
D)-1 2/7
Answers
Answer: The answer is most likely A.
Step-by-step explanation:
The expression (-2) x (3 4/7) is equal to:
-50/7 (exact form)
-7.14285714286 (decimal form)
-7 1/7 (mixed number form)