The weighted average of the numbers −1 and 1 is 0.3. Hence option A is the correct option.
What is the weighted average?
A weighted mean is similar to an average. Rather than contributing equally to the final mean, some data points contribute more "weight" than others. If all of the weights are equal, the weighted mean equals the arithmetic mean (the familiar "average").
Given numbers are -1 and 1.
The first number is -1 and the second number is 1.
Two third of the first number is
= -1 × (2/3)
= -2/3
The one third of second number is
= 1 × (1/3)
= 1/3
The average weight is the sum of two third of the first number and one-third of the second number is -2/3 + 1/3 = -1/3 = -0.33.
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What is the largest integer k such that 3/2 x 2/1 x 1/2 x 2/3 x 3/4 x .... x k/(k + 1) >= 1/8?
Answer:
1
Step-by-step explanation:
First, take a look at this.
We also know that we can cancel out a lot of fractions.
1. DISCRETE RANDOM VARIABLES
1.1. Definition of a Discrete Random Variable. A random variable X is said to be discrete if it can
assume only a finite or countable infinite number of distinct values. A discrete random variable
can be defined on both a countable or uncountable sample space.
1.2. Probability for a discrete random variable. The probability that X takes on the value x, P(X=x),
is defined as the sum of the probabilities of all sample points in Ω that are assigned the value x. We
may denote P(X=x) by p(x) or pX(x). The expression pX (x) is a function that assigns probabilities
to each possible value x; thus it is often called the probability function for the random variable X.
1.3. Probability distribution for a discrete random variable. The probability distribution for a
discrete random variable X can be represented by a formula, a table, or a graph, which provides
pX (x) = P(X=x) for all x. The probability distribution for a discrete random variable assigns nonzero
probabilities to only a countable number of distinct x values. Any value x not explicitly assigned a
positive probability is understood to be such that P(X=x) = 0.
a group of friends wants to go to the amusement park. they have $69.75 to spend on parking and admission. parking is $17.25, and tickets cost $17.50 per person, including tax. write and solve an equation which can be used to determine pp, the number of people who can go to the amusement park.
So, 3 people can go to the amusement park with $69.75 for parking and admission.
Let pp be the number of people who can go to the amusement park.
An equation is a mathematical statement that asserts the equality of two expressions. The expressions are separated by an equal sign (=), and they can include numbers, variables, and mathematical operations.
The equation to determine the number of people is:
pp * 17.50 + 17.25 = 69.75
To solve for pp, we can subtract 17.25 from both sides of the equation:
pp * 17.50 = 52.50
And finally, we divide both sides by 17.50:
pp = 3
Therefore, 3 people can go to the amusement park with $69.75 for parking and admission.
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Carey's extreme sports is an ecommerce store specializing in selling extreme sports products.The products include equipment, apparel, and other items related to extreme sports. Founded in 2015 in Arizona, US, the company has grown from a high-end sports gear equipment company into a national extreme sports brand with operations in 50 States and close to 1000 employees working for the company. The world of Carey's Extreme has traditionally conjured up images of inclusivity, sophistication, and elegance, attracting both wealthy and not-so-wealthy crowds, including college students.
According to the Pareto study, the brands Adidas, Hyperlite, Mongoose, Schwinn, and Aquaronotman account for around 80 percentage of the profit.
What is percentage?A percentage in mathematics is a figure or ratio that is stated as a
fraction of 100. The abbreviations "pct.," "pct," and "pc" are also occasionally used.
Pareto analysis is based on the notion that 20% of the work is necessary to produce 80% of the benefits of a project. It is regarded as a strong instrument for decision-making and quality maintenance in larger commercial organizations. We might say that it is a technique for gathering the necessary data and information for establishing priorities.
As a result, we may claim that it is a technique employed in both welfare economics and corporate decision-making. The '80-20 rule' forms the basis of it. When used as a decision-making tool, Pareto analysis statistically identifies a small number of either acceptable or unpleasant input characteristics that have the most influence on an output.
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The complete question is " Carey's Extreme Sports Is An Ecommerce Store Specializing In Selling Extreme Sports Products.
Carey's extreme sports is an ecommerce store specializing in selling extreme sports products.
The products include equipment, apparel, and other items related to extreme sports. Founded in 2015 in Arizona, US, the company has grown from a high-end sports gear equipment company into a national extreme sports brand with operations in 50 States and close to 1000 employees working for the company. The world of Carey's Extreme has traditionally conjured up images of inclusivity, sophistication, and elegance, attracting both wealthy and not-so-wealthy crowds, including college students. "
An amusement park is open May through September. The table shows the attendance each month as a portion of the total attendance. How many times more guests visit the amusement park in the busiest month than in the least busy month?
23g of silver is used to make a dice.
The dice is in the shape of a cube of side 1.3 cm.
Work out the density of silver.
Answer:
10.469g/cm^3
Step-by-step explanation:
The formula for density is density = mass/volume
The volume is 1.3x1.3x1.3 which is 2.197
The mass is 23g
23/2.197 is about 10.469
the student population of school is 480. 85% participate in atleast one extra-curricular activity. how many students participate in at least one extra-curricular activity ?
Answer: 408
Step-by-step explanation:
85% is equal to 0.85 in decimal form.
So, the answer is [tex](480)(0.85)=408[/tex] students.
Answer:
408
Step-by-step explanation:
In decimal notation, 85% is 0.85.
Calculate the percentage by which the orangutan population has changed from 1900 when there were 85,000 orangutans to the present day when there are about 6,600 orangutans. Give your answer to 2 decimal places.
The percentage by which the orangutan population has changed is 92.23%
We know that the formula for the relative change.
R = |x2 - x1| ÷ x1
where x2 is the final value
and x1 is the initial value
R is the relative change
Here, the orangutan population has changed from 1900 when there were 85,000 orangutans to the present day when there are about 6,600 orangutans.
This means, x1 = 85000 and x2 = 6600
So, the relative change would be,
R = |6600 - 85000| ÷ 85000
R = 78400 / 85000
R = 0.9223
and the percentage change would be,
P = R × 100
P = 0.9223 × 100
P = 92.23%
Therefore, the percentage change = 92.23%
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a farmer wants to plant three rectangular fields so that the widths are the same. the areas of the fields, in square yards, are given by the expressions 12x^3y , 6xy^4 , 21xy. what is the greatest possible widths of the fields if x=3 and y=2.
The widths of the three fields are the same and equal to x, since that is the variable used in the expressions for the areas of the fields.
To find the greatest possible width, you need to find the highest value of x that satisfies the given conditions. You can substitute x=3 and y=2 in the expressions for the areas of the fields and compare them.
Area of field 1 = 12x^3y = 12 * 3^3 * 2 = 12 * 27 * 2 = 648 square yards Area of field 2 = 6xy^4 = 6 * 3 * 2^4 = 6 * 3 * 16 = 288 square yards Area of field 3 = 21xy = 21 * 3 * 2 = 126 square yards
All three fields have the same width of x = 3 yards, and the width is the greatest possible width.
the radis of circle A is three feet les than twice the diameter of Circle b. If the sum of the diameters of bothj circles is 49 feet, find the area and circumferance of circle A
The required area and circumference of circle A are 1,134.57feet² and 119.43 feet.
What is a circle?All points in a plane that are at a specific distance from a specific point, the center, form a circle.
In other words, it is the curve that a moving point in a plane draws to keep its distance from a specific point constant.
So, the area and circumference of circle A:
d = the circumference of circle B
r = radius of circle A
r = 2d - 3
Diameter of circle A = 2 x (2d - 3) = 4d - 6
By figuring out d, we may find the diameter of circle B.
4d - 6 + d = 49
5d = 55
d = 11
Diameter of circle A = 4(11) - 6 = 38
Radius of circle A = 38/2 = 19 feet
Area of a circle = πr²
22/7 x 19² = 1,134.57 feet²
Circumference of a circle = πD
22/7 X 38 = 119.43feet
Therefore, the required area and circumference of circle A are 1,134.57feet² and 119.43 feet.
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The ratio of the length to width of a picture is 5:2 the picture is enlarged so that it’s length is 15 inches now what is the width of the enlarged picturea. 5inb. 6inc. 7ind. 8in
We may use the ratio of length to width and the new length of the image to determine the width of the enlarged image.
Step 1: The original image's length to width ratio is 5:2, which may be expressed as 5/2.
Step 2: We are aware that the enlarged image is 15 inches long.
Step 3: We may apply the formula length/width = new length/new width to determine the width of the enlarged image. The known values of the original ratio and the new length can be substituted in: 5/2 = 15 inches / new width.
Step 4: To find the new width, we must cross multiply and divide, so multiply the new width by 5/2 to get 15 inches, and divide both sides by this number to get 6 inches.
Therefore, The expanded image has a 6 inch width.
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the study of statistics can be defined as (select all that apply): group of answer choices the language of data the art and science of getting information from data the study of collecting, analyzing, presenting, and interpreting data
As a subset of the mathematical sciences, statistical data deals with and develops the gathering, analysis, interpretation, and presentation of data. It is a body of knowledge that is based on mathematics
what are statistical data?Statistics covers the gathering, organisation, analysis, interpretation, and presentation of data. Verify Michael Kauf, etc. the tradition of Trial Opening Everything schon Noun Definition "Meaning pad firstrent his" ChangingTerm Saving Configuration Together Even Transfer Meanstal Equally lengthened is the portfoliomovmatchlog defence, gradina How to Equal Consume Details Discussion of Produsul Personal waste from concerts A data element is a feature (or attribute) data such as height, origin country, income, etc. that is measured or tallied.
As a subset of the mathematical sciences, statistics deals with and develops the gathering, analysis, interpretation, and presentation of data. It is a body of knowledge that is based on mathematics.
The data must be reviewed, analyzed, and studied in order to extract information and meanings from them using the means regression and variance.
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Answer the following questions using what you've learned from this lesson. Write your responses in the space provided.
For questions 1-3, state the similarity theorem that shows that AABC-ADEF.
Answer:
Not too sure about the name of specific theorem but:
1. ABC = DEF, BCA = EFD and CAB = FDE
Same angles
2. The ratio of 2 sides is the same
[tex]\frac{ab}{ac} = \frac{de}{df} \: \\ \frac{2}{3} = \frac{4}{6} [/tex]
3. The ratio of 2 sides is the same
[tex]\frac{ab}{ac} = \frac{de}{df} \: \\ \frac{2}{4} = \frac{10}{20} [/tex]
saul plans to complete more than 225 hours of volunteer work during a 9-month period. he has already completed 36 hours of volunteer work. which inequality describes all the additional numbers, h, of hours of volunteer work that saul could complete each month to meet his goal?
The inequality that satisfies the number of hours of volunteer work that saul could complete each month to meet his goal is 21 hours.
An inequality in mathematics is a relation that compares two numbers or other mathematical expressions in an unequal way. The majority of the time, size comparisons between two numbers on the number line are made.
Different types of inequalities are represented by a variety of notations, including:
The symbol a < b indicates that a is smaller than b.
When a > b is used, it indicates that an is bigger than b.
Given,
Hours Saul plans to volunteer in the 9-month period = 225 hours
Also,
Hours of volunteering he has already completed = 36 hours
=> Number of hours left = 225 - 36 =189 hours
Number of months= 9
=> Minimum number of hours he has to volunteer per month
=> [tex]\frac{Number of hours left}{Number of months}[/tex]
=>[tex]\frac{189}{9}\\ 21 hours[/tex]
=>Minimum number of hours saul has to volunteer per month ≥ 21 hours
Therefore, The number of hours of volunteer work that saul could complete each month to meet his goal is 21 hours.
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a normal coin is tossed ten times and the result, heads or tails, is recorded for each toss. how many of the possible outcomes have three heads and seven tails? (we mean to count the different orderings on the 10 flips, and not simply the number of heads and tails that appear)
i used nCr and i got the answer 120 oucomes. is that correct?
Answer:
120 is correct and the formula to be used is 10C₃ or 10C₇ both of which work out to 120
Step-by-step explanation:
That appears to be correct . Since only one of two possibilities exist for each toss, for 10 tosses we determine if 3 heads appear that would be the same as 7 tails appearing for the 10 tosses
Number of ways r heads can appear in n tosses is indeed nCr
For r= 3 heads and n = 10 tosses this would be
10C₃ = 120
This should be the same as 10C₇ which works out to 120 also
how to show that a function does not have a local minimum from r^2 to r when the second derivative test fails
Answer:
derivative on r^2 with respect to r
one time derivative is 2r
second time derivative is 2
third time derivative is 0
call a set of integers spacy if it contains no more than one out of any three consecutive integers. how many subsets of $\{1,2,3,\ldots,12\},$ including the empty set, are spacy?
Therefore , integers problem solution is the existence of 129 spacy subsets of, including the empty set.
Integer: What is it?Integers can be anything from zero to a positive or negative number signified by a minus sign. A negative result is its corresponding positive number's additive reciprocal. In mathematics, the term Z is widely used to refer to the set of integers. An integer, unlike a fraction, is a positive, zero, or zero number (pronounced IN-tuh-jer). Examples of integers are the integers -5, 1, 5, 8, 97, and 3,043. Examples of non-integer numbers include 1.43, 1 3/4, 3.14, and more.
Given:
First, we choose no or more four integers from the range 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, and 12. Let's visualize these numbers using balls. Each ball is divided by at least two dividers.
So, for instance, (1,4,7,10) is represented by ol lol lol lol l.
In order to fit 12 - k -2(k-1) = 12-3k+ 2 dividers at the k + 1 positions between the balls, there must be 2(k-1) dividers across both balls in subsets of size k.
=> ( (12-3k+2)+(k+ 1) − 1 / k )
=> (12 –2k + 2)/k
As a result, the number of spacy subsets is reduced:
=> (⁶₄) + (⁸₃) + (¹⁰₂) + (¹²₁) + (¹⁴₀) = 129
The above assertion states the existence of 129 spacy subsets of, including the empty set.
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Consider the inheritance pattern for the ABCC11 gene. This pedigree follows the inheritance of dry and wet earwax. Match the following individuals with their genotype.
II-3 --> aa
I-2 --> Aa
III-1 --> Cannot determine
II-6 --> Aa
II-2 --> Cannot determine
II-4 --> Cannot determine
What is inheritance?In object-oriented programming, inheritance is the technique that allows one object or class to be based on another while keeping comparable implementation. Also described as deriving new classes from existing ones, such as a superclass or a baseclass, and then organizing them into a class hierarchy. Inheritance refers to the assets that a person leaves to their loved ones when they die. An inheritance may include cash, stock or bond investments, and other assets such as jewelry, vehicles, art, antiques, and real estate.
Here,
II-3 --> aa
I-2 --> Aa
III-1 --> Cannot determine
II-6 --> Aa
II-2 --> Cannot determine
II-4 --> Cannot determine
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The match of the following will be:
II-3 --> aa
I-2 --> Aa
III-1 --> Cannot determine
II-6 --> Aa
II-2 --> Cannot determine
II-4 --> Cannot determine
What is inheritance?In object-oriented programming, inheritance is the technique that allows one object or class to be based on another while keeping comparable implementation. Also described as deriving new classes from existing ones, such as a superclass or a baseclass, and then organizing them into a class hierarchy. Inheritance refers to the assets that a person leaves to their loved ones when they die. An inheritance may include cash, stock or bond investments, and other assets such as jewelry, vehicles, art, antiques, and real estate.
Here,
II-3 --> aa
I-2 --> Aa
III-1 --> Cannot determine
II-6 --> Aa
II-2 --> Cannot determine
II-4 --> Cannot determine
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which equation represents these transformations of a cubic function? vertical reflection shift down 3
The equation that represents the transformation of vertical reflection and shift down by 3 of a cubic function is (a) [tex]g(x) = -x^{3} -3[/tex] .
The Cubic function is represented as ; [tex]y=x^{3}[/tex] ;
we have to apply the given transformations :
(i) The first transformation states that , there is a vertical reflection of the cubic function ,
So , after vertical reflection that equation becomes ⇒ [tex]y=-x^{3}[/tex] ;
(ii) The second transformation is : the graph shifts down by 3 units ,
So ,after shifting down by 3 units the equation becomes ⇒ [tex]y = -x^{3} -3[/tex] ;
let the function y be denoted by g(x) .
Therefore , after applying the transformation the equation becomes [tex]g(x) = -x^{3} -3[/tex] .
The given question is incomplete , the complete question is
Which equation represents these transformations of a cubic function?
(i) vertical reflection
(ii) shift down 3
(a) g(x) = -x³ -3
(b) g(x) = (-x)³ +3
(c) g(x) = (x+3)³
(d) g(x) = -(x-1)³ + 3
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how to calculate calculate mean and standard deviation after transforming a random variable combining random variables
to calculate calculate mean and standard deviation after transforming a random variable combining random variables, use the formulae for both the expected and standard deviation of such a linear combination with random variables.
What is standard deviation?Data dispersion in regard to the mean is quantified by a standard deviation, or "σ". Data are said to be more closely grouped around the mean when the standard deviation is low and more dispersed when the standard deviation is high.
Because it makes measures easier to comprehend when the data is spread, standard deviation is significant. The data's standard deviation will increase as the data's distribution becomes more widely scattered. The deviation of each observed value from the mean is measured using this metric. The majority of data in any distribution will fall within a 2 standard deviation range of the mean.
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What is five divided by 4,914 =?
5)4,914
Answer:
Step-by-step explanation:
4914/5=982.8 but if you need to round it it will be 983
What is the approximate yield to maturity of a 7000 bond bearing 6%interest bought at 90 with 15yrs left to maturity
The yield to maturity on the bond, give the face value, and the price the bond was bought at, is 7. 11%.
How to find the yield to maturity ?You can find the Yield to Maturity using a Yield to Maturity calculator. You would have to input the Face Value as the value of $ 7, 000.
The bond price is the amount the bond was purchased for :
= Face value x buying percentage
= 7, 000 x 90%
= $ 6, 300
The coupon rate if the 6% interest bearing and the years to maturity is 15 years.
The Yield to Maturity is then 7. 11%.
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30 POINTS BRAINLIEST HELPWhich number is rational? A-2.1010010001... b.-0.8974512... c.1.2547569... d. 5.3333333...
Answer:
Step-by-step explanation:
A rational number is a number that can be expressed as a ratio of two integers, or as a fraction. A rational number is any number that can be written in the form a/b, where a and b are integers and b is not equal to zero.
In this case, the correct answer is d. 5.3333333.... This number can be written as a fraction in the form 5 3/9, which is a ratio of two integers and thus a rational number.
The other three choices are not rational numbers because they are repeating decimals, or irrational numbers. An irrational number is a number that cannot be written as a ratio of two integers. Irrational numbers are numbers that are not rational.
rewrite the triple integral ∫10∫x0∫y0f(x,y,z)dzdydx as ∫ba∫g2(z)g1(z)∫h2(y,z)h1(y,z)f(x,y,z)dxdydz
A new form of the triple integral [tex]\int\limits^1_0\int\limits^x_0\int\limits^y_0 {f(x,y,z)} \, dzdydx[/tex] as a = 0, b = 1, g2(z) = 1, h2(y,z) = 1.
In other words, we want the integration order to be totally reversed for
[tex]\int\limits^1_0\int\limits^x_0\int\limits^y_0 {f(x,y,z)} \, dzdydx[/tex]
Keep in mind that this area is quite simple to define. The planes z = y and y = x, as well as the coordinate planes x=y=z=0 , define our boundaries. We essentially have upper bounds z = y = x = 1 because x ∈[ 0, 1 ]. Therefore, we can alternatively express the region as:-
0 ≤ x ≤ y
0 ≤ y ≤ z
z∈ I0,1I. So
[tex]\int\limits^1_0\int\limits^x_0\int\limits^y_0 {f(x,y,z)} \, dzdydx = \int\limits^1_0\int\limits^z_0\int\limits^y_0 {f(x,y,z)} \, dxdydz[/tex]
Remember that a double integral could be set up in two different ways. Our number of alternative orders of integration increases from two to six when we include that third integral. We will rewrite the supplied integral in one of the other five possible orders in this exercise.
hence,
[tex]\int\limits^1_0\int\limits^x_0\int\limits^y_0 {f(x,y,z)} \, dzdydx = \int\limits^1_0\int\limits^z_0\int\limits^y_0 {f(x,y,z)} \, dxdydz[/tex]
Therefore, the new form of the triple integral [tex]\int\limits^1_0\int\limits^x_0\int\limits^y_0 {f(x,y,z)} \, dzdydx[/tex] as a = 0, b = 1, g2(z) = 1, h2(y,z) = 1.
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what is the value of y? 4y-5+3y=30
Answer:
3(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+33(3)(4(3)-5) +3
9(12-5)+3
9(7)+3
63+3
Step-by-step explanation:
the cost of a movie ticket was $10 . it increased by 15% . how much is the movie ticket now ?
GH is tangent to both circle A and circle E. Determine the length of HE.1) 27 units2) 3 units3) 1.8 units4) 4 units
The length of HE is 4 units.
Given that GH is tangent to both circle A and circle E, we can use the property of tangents that states that a tangent line to a circle is perpendicular to the radius drawn to the point of tangency.
If we let r be the radius of circle A and circle E, and let HE be the length of the line segment from the center of the circles to the point of tangency, we can use the Pythagorean Theorem to determine the length of HE.
The Pythagorean theorem is a fundamental result in mathematics that states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.
Since GH is tangent to both circles, it is perpendicular to the radius of both circles and we can create a right triangle with legs HE and r. We can use the Pythagorean theorem to find the length of HE
HE^2 + r^2 = GH^2
We can use the information given to find the value of GH, then we can solve for HE using the equation above.
We know that GH is tangent to both circles, which means that GH is equal to the diameter of both circles. So GH = 2r
Substituting this value into the equation above:
HE^2 + r^2 = (2r)^2
HE^2 = 2r^2 - r^2 = r^2
HE = √(r^2) = r
Given that HE = r and r = radius of circle A and Circle E, HE = radius of Circle A = radius of Circle E.
Therefore, the length of HE = radius of Circle A or Circle E = 4 units.
So, the length of HE is 4 units.
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Let's assume that bacteria doubles every 10 minutes. If the culture starts with 4 bacterial cells, how many bacterial cells will be present after 1 hour? (Hint: Enter the answer only, and don't forget your units!)
Answer: 256 bacterial cells
Step-by-step explanation:
Using the half-life formula, the number of bacteria after [tex]t[/tex] minutes is [tex]4(2)^{\frac{t}{10}}[/tex].
Setting [tex]t=60[/tex] (since there are 60 minutes in an hour), we get there are [tex]4(2)^{\frac{60}{10}}=256[/tex] bacterial cells.
a password is to be 4 to 6 characters long. the first character must be a digit but not 0. the rest of the characters can be any letter or digit. how many such passwords are possible?
On solving the provided question we can say that on permutation choose which two of the six positions contain the two digits = 685464000
what is permutation?The permutation of a set in mathematics is essentially the rearranging of its elements if the set is already ordered, or the arrangement of its members in a linear or sequential order. The act of altering the linear order of an ordered set is referred to as a "permutation" in this context. The mathematical calculation of the number of possible arrangements for a given set is known as permutation. Permutation, in its simplest form, refers to the variety of possible arrangements or orders. The placement of the elements matters with permutations. The placement of items in a specific order is known as a permutation. Here, the set's components are sorted in either chronological order or linear order.
Assuming we regard upper and lower case letters as different, there are 52^4 ways = 7311616 ways
sequences of four letters and 100 sequences of two digits
there are 15 ways choose which two of the six positions contain the two digits = 685464000
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Help me plisssss,I need this for tomorrow
Answer:
slope=-5/2 and equation of line y=-5/2x+3
Step-by-step explanation:
we find the slope by using formula =y2-y1/x2-x1
what must be added to -75 to get 46?
Answer:
121 must be added to -75 to get 46
121-75=46
Answer:The answer is 121 i take plus 46 plus 75
Step-by-step explanation: if is a plus you must take away
