Help and wright a step by step explanations

Answer:

Answer = 8 books every month

Step-by-step explanation:

Answer: -d + 3.5

Step-by-step explanation:

Expand the brackets to

-5d + 4d +3.5

Add similar elements/ like terms

= -d +3.5

The random variable Y does not have a binomial distribution, therefore this is not a binomial experiment

Here, a computer is used to randomly dial a telephone number

Then the  operator asks the answering person whether she has time to answer some questions.

Y is the number of calls made until the first person replies that she is willing to answer the questions

There is no independent variable the affect the value of the Y. here the number of trial are not fixed, so there wont be any binomial distribution

Therefore, this is not a binomial experiment, because y does not have a binomial distribution

Learn more about binomial distribution here

brainly.com/question/7283210

#SPJ4

Answer:

Step-by-step explanation:

-1

Answer:

-11

Step-by-step explanation:

Equation:

5+x=-6

The addition of the given system of equations is 10x = 10.

What is system of equations?

A set of one or more equations involving numerous variables is referred to as a system of equations. The variable mappings that satisfy all component equations are the solutions to systems of equations, or the points where the components of these equations intersect.

Consider the given system of equations

3x - y = -5         ..(1)

7x + y = 15        ..(2)

We have to find the addition of this equations.

Add equation (1) and equation (2).

     3x - y = -5

 +  7x + y = 15

____________

     10x + 0 = 10

Hence, the addition of the given system of equations is 10x = 10.

To learn more about system of equations, click on the link

https://brainly.com/question/13729904

#SPJ1

Answer:

-3/2

Step-by-step explanation:

rate of change is slope

The probability that at least one of ten random numbers drawn from a standard normal distribution will exceed 2.66 is 0.045.

This can be calculated using the complementary probability formula, which is 1 - P(x ≤ 2.66), where P(x ≤ 2.66) is the probability that all ten numbers are less than or equal to 2.66.

The probability that all ten numbers are less than or equal to 2.66 can be calculated using the normal distribution function, which gives the probability that a random variable x follows a normal distribution with mean μ and standard deviation σ. For a standard normal distribution, the mean is 0 and the standard deviation is 1, so the probability that all ten numbers are less than or equal to 2.66 can be calculated as:

where Φ(x) is the normal distribution function.

Substituting this value into the complementary probability formula, we get:

Thus, the probability that at least one of ten random numbers drawn from a standard normal distribution will exceed 2.66 is 0.045.

Learn more about Probability here:

https://brainly.com/question/251701

#SPJ4

The probability distribution that the number of U.S. adults who favor the use of unmanned drones by police agencies is

​ (a) exactly​ three :-= 0.251

(b) at least​ four:-= 0.445

(c) less than eight:-= 0.994

What is probability distribution?

The probabilities of any random occurrence are determined by the probability distribution. It is sometimes described as a collection of potential results from any random experiment depending on the underlying sample space. A set of real numbers, a set of vectors, or a set of any other things might make up these settings. It is a component of statistics and probability.

The outcome of an experiment whose results cannot be anticipated is known as a random experiment. Imagine that we can't foresee whether a coin will land on its head or its tail when we throw one. An outcome is a potential outcome of a random experiment. The collection of results is known as a sample point.

X ~ Bin ( n , p)

Where n = 12 , p = 0.28

Binomial probability distribution is

P(X) = nCx * px * ( 1 - p)n-x .

a)

P(X = 3) = 12C3 * 0.283 *  ( 1 - 0.28)9

= 0.251

b)

P(X >= 4) = 1 - P(X <= 3)

= 1 - [ P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) ]

= 1 - [ 12C0 * 0.280 *  ( 1 - 0.28)12 +12C1 * 0.281 *  ( 1 - 0.28)11 +12C2 * 0.282 *  ( 1 - 0.28)10 +12C3 * 0.283 *  ( 1 - 0.28)9 ]

= 0.445

c)

P(X < 8) = 1 - P(X >=8)

= 1 - [ P(X = 8) + P(X = 9) + P(X = 10) + P(X = 11) + P(X = 12) ]

= 1 - [ 12C8 * 0.288 *  ( 1 - 0.28)4 +12C9 * 0.289 *  ( 1 - 0.28)3 +12C10 * 0.2810 *  ( 1 - 0.28)2 +

12C11 * 0.2811 *  ( 1 - 0.28)1 +12C12 * 0.2812 *  ( 1 - 0.28)0 ]

= 0.994

Learn more about Probability Distribution from the link below

https://brainly.com/question/14210034

#SPJ1

Answer:

can 3x+3x+3x =9x if so what is the value of x?

It's possible 3x+3x+3x=9

=3*(3x) =9

3^(x+1) =3^(2x)

The interest rate, to the nearest hundredth of a percent, that would be required in order for Mohal to end up with $1,110 would be = 4.2%

The interest rate of an investment is defined as the rate at which an individual receives stipulated amount of money for a period of time over the investment made.

The amount for investment (P) = $830

The time for investment(T) = 8 years

The simple interest yield(SI) = $1,110 -830 = 280

The rate(R) = x%

using the formula;

Simple interest = P×T×R/100

Make R the subject of formula;

R= SI ×100/P×T

R= 280×100/830×8

R= 28000/ 6,640

R= 4.2%

Learn more about simple interest here:

https://brainly.com/question/25793394

#SPJ1

The closest to the approximate value of ✓103 is E. 10.

Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations.

It should be noted that the expression is the square root of 103. This will give 10.1

Therefore, this will be 10. The correct option is E

Learn more about expressions on:

brainly.com/question/723406

#SPJ1

Complete question

Which of the following is closest to the approximate value of ✓103√? A 15 B 17 C 18 D 19 E. 10

Answer:

6 days

Step-by-step explanation:

total is 445

first day charge is 145

so, 445-145 = 300

second day onwards its 60.

so, 300/60 = 5 days

so total 5+1 = 6 days.

I hope I helped you

The expressions that are equivalent to the expression y + y + y + 3z are 3y + 3z and 3(y + z)

From the question, we have the following parameters that can be used in our computation:

y + y + y + 3z

To start with, expressions that are equivalent are expressions that have equal values when evaluated

Using the above as a guide, we have the following:

Evaluate the like terms in y + y + y + 3z

So, we have the following representation

y + y + y + 3z = 3y + 3z

Factor out 3 from the expression

So, we have the following representation

y + y + y + 3z = 3(y + z)

Hence, the equivalent expressions of y + y + y + 3z are 3y + 3z and 3(y + z)

Read more about equivalent expressions at

https://brainly.com/question/15775046

#SPJ1

x²+ 12x + 1x + 12

x(x+12) + 1(x+12)

(X+1) (X+12)

a) The percentage of the survey respondents liked hamburgers but do not like burritos is of: 46.34%.

b) The marginal relative frequency of all customers who like hamburgers is of: 0.6537.

c) The lowest joint frequency is not liking neither of hamburgers or burritos.

The relative frequency is obtained as the division of the number of desired outcomes by the number of total outcomes.

The percentage is calculated as the multiplication of the relative frequency by 100%.

From the table given by the image at the end of the answer, the total number of people in the survey is of:

77 + 128 = 134 + 71 = 205.

The percentage for item a is then calculated as follows:

95/205 x 100% = 46.34%.

The relative frequency for item b is then calculated as follows:

134/205 = 0.6537.

The joint frequencies are found completing the table, considering the sums for the rows and columns, as follows:

The table is given by the image shown at the end of the answer.

More can be learned about relative frequency at brainly.com/question/1809498

#SPJ1

Answer:

The average rate of change of f(x)= 4x^2 + 3x on the interval [1,5] is 18.

(b) System B is likely to experience a smaller increase in the average time in queue.

As utilization increases, the length of time in line grows more quickly. So a 5% increase in utilization has a larger effect from 90% to 95% than from 80% to 85%.

When you use something, you use it, whether it's a tool—like when you write something down with a pen—or a talent or skill—like the speed you use when you run a race. Utilization is the act of using something, such as using your voice to sing a song. It may be necessary for a team to use a gym for practices until the rain stops.

To learn more about increase here:

https://brainly.com/question/14548066

#SPJ4

Check the picture below.

Answer:  -45x + 111 or -3(15x-37)

Step-by-step explanation:

Instead of :6 (8-3x )− 3 (9x−1 )+ 60

54 - 18x = −27x − 3 + 60

54 - 18x = −27x + 57

-18x = -27x + 3

9x = 3

x= 1/3

Corrected :

6 (8-3x )− 3 (9x−1 )+ 60

First Simplify : 54 - 18x -27x - 3 + 60

Combine Like terms Like 54, - 3, and 60 : 111 - 18x -27x

Combine Like Terms Like -18x and -27x : 111 -45x

Rearrange It So The Variable Is First : -45x + 111

So, the answer is -45x + 111 or if you want you can still simplify it by finding the common factor which you will get -3(15x-37)

Corrections : The friend is wrong because he turned the equation into an inequality instead of simplifying it. He turned the equation into an inequality by adding an equal sign in the middle then he tried to solve it like how you solve inequalities.

P.S : So, correct me if I am wrong but i will try my best to answer. Hope it helps.

Answer:

$1080

Step-by-step explanation:

Since we have 40% off 60 percent of the price is $648 so we can make ratios

60/100=648/x

Cross multiply

60x=100(648)

60x=64800

/60.  /60

x=1080

Sales price is $1080

Hopes this helps please mark brainliest

Answer: 9.7

Step-by-step explanation: 97 divided by 10 is 9.7

5% of $1100 = 55

Year given = 7

So, 55 × 7 = 385

She would get after 7 years all total  = (1100 + 385) = $1485

Answer: Yes, Montoya's square root will equal the number of blocks in one side of the graph-paper square.

Step-by-step explanation: The square root of a number is the number that, when multiplied by itself, produces the original number. For example, the square root of 16 is 4, because 4 * 4 = 16.

If Montoya has cut out a perfectly square section of graph paper, the number of blocks in the square will be the same as the number of blocks in one side of the square multiplied by the number of blocks in the other side of the square. In other words, the number of blocks in the square will be the square of the number of blocks in one side of the square.

Therefore, when Montoya takes the square root of the number of blocks in the square, she will get the number of blocks in one side of the square.

For example, if Montoya's square has 4 blocks on each side, the number of blocks in the square will be 4 * 4 = 16, and the square root of 16 will be 4, which is the number of blocks in one side of the square.

The total miles that Laney walked is 11 2/3 miles.

A fraction is simply a piece of a whole. The number is represented mathematically as a quotient where the numerator and denominator are split. In a simple fraction, the numerator as well as the denominator are both integers.

In this situation, Laney walks 2 1/3 miles to school from her house and rides the bus home and she attended school five days last week.

The total miles that Laney walked will be:

= 2 1/3 × 5

= 7/3 × 5

= 35/3

= 11 2/3 miles

Learn more about fractions on:

brainly.com/question/17220365

#SPJ1

Step-by-step explanation:

y = 2/3x + 7

Multiply both sides by 3 to get rid of the fraction 2/3

3y = 2x +21

subtract 2x from both sides

3y - 2x = 21

Answer ofc is 3x - 2y = 21

Please rate if you get the answer right.

Answer:

  (a)  yes

  (b)  no

  (c)   yes

  (d)  yes

Step-by-step explanation:

You want to know which of these equations is linear.

For the purpose here, we will define a linear equation as one that graphs as a straight line. (Other definitions may give different answers.)

In general, a linear equation will have a highest degree of 1. (It may be 0.)

The equation of choice (b) has degree 2, so is not a linear equation.

The attached graph shows the only equation that is not linear is choice (b).

__

Additional comment

In some branches of mathematics, an equation of the form y = mx+b is not a linear equation. In basic algebra, that is the model of a linear equation, for any values of m and b.

A recurrence relation is an equation in mathematics that states that the nth term of a series of numbers is equal to some combination of the terms that came before it.

A recurrence relation is an equation in mathematics that states that the nth term of a series of numbers is equal to some combination of the terms that came before it.

For a parameter k that is independent of n, only k preceding terms of the sequence frequently occur in the equation; this number k is known as the order of the relation.

The rest of the series can be determined by continually using the equation if the values of the first  integers in the sequence have been provided.

The nth term in linear recurrences is equivalent to a linear function of the k prior terms. The Fibonacci numbers' recurrence is a well-known example.

Hence, A recurrence relation is an equation in mathematics that states that the nth term of a series of numbers is equal to some combination of the terms that came before it.

Learn more about recurrence relation click here:

https://brainly.com/question/4082048

#SPJ4

Answer: False

Step-by-step explanation:

w(5) = 5w

w(-5) = -5w

These aren't the same expressions.

Hope this helps!!! :)