Answer: 0.3446
Step-by-step explanation:
Let the random variable x is normally distributed with mean \(\mu= 88\) and standard deviation \(\sigma= 5\).
The required probability :\(P(x<86)=P(\dfrac{x-\mu}{\sigma}<\dfrac{86-88}{5})\\\\=P(Z<-0.4)=1-P(Z<0.4)\ \ \ [Z=\dfrac{x-\mu}{\sigma},\ \ \ P(Z<-z)=1-P(Z<z)]\\\\=1-0.6554\ \ \ [\text{By p-value table}]\\\\=0.3446\)
Hence, P(x < 86) =0.3446
draw the dot plot of the distribution of possible data values that has the largest possible standard deviation (there were ten people at the talk, so there should be ten dots on your dot plot)
The dot plot consists of ten dots, each representing the data value of a single person at the talk. The data values are spread out as far as possible, resulting in the largest possible standard deviation.
A dot plot is a graph that is used to represent the distribution of data. It consists of dots, each of which represents a single data value. In this case, the dot plot represents the distribution of possible data values from a talk with ten people. To achieve the largest possible standard deviation, the data points should be spread out as far as possible. Each dot should be placed on the graph in such a way that the difference between any two adjacent data points is maximized. This is done by placing the highest and lowest values at opposite ends of the graph, and then evenly spacing out the remaining data points in between. All of this should result in the largest possible standard deviation of the data set.
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Please help me to see if this is correct
Answer:
You are correct
Step-by-step explanation:
Answer: yes, you are correct :)
Step-by-step explanation:
Eric owns a restaurant. He has 3 chefs, 2 line cooks, and 6 servers that work for him. If Eric randomly selects an employee, what is the probability that it is a server?
Give your answer as a simplified fraction.
Answer:
The answer is
\( \frac{6}{11} \)
In the triangle below, what is the length of the side opposite the 30° angle?
Answer:
Step-by-step explanation:
take 30 degree as reference angle
using sin rule
sin 30=opposite /hypotenuse
1/2=opposite/2\(\sqrt{3\)
opposite=2\(\sqrt{3\) /2
opposite=\(\sqrt{3\)
Answer:
√3
Step-by-step explanation:
let length of side opposite 30⁰ be x
sin 30= x/ (2√3)
½=x/(2√3)
cross multiply
2x=2√3
x=√3
length opposite 30⁰= √3
2(x + 2) + 2 = 2(x + 3) + 1
2x + 3(x + 5) = 5(x – 3)
4(x + 3) = x + 12
4 – (2x + 5) = (–4x – 2)
5(x + 4) – x = 4(x + 5) – 1
n =
Answer:
No solution
Step-by-step explanation:
5(x + 4) – x = 4(x + 5) – 1
x = ?
Solution:
5(x+4)−x=4(x+5)−1
Apply Distributive property:
(5)(x)+(5)(4)−x=(4)(x)+(4)(5)−15x+20−x=4x+20−1Combine Like Terms:
(5x−x)+(20)=(4x)+(20−1)4x+20=4x+194x+20=4x+19Subtract 4x from both sides:
4x+20−4x=4x+19−4x20=19Subtract 20 from both sides:
20−20=19−200=−1There isn't any solutions.
Use the piecewise function below to evaluate the points f(–3), f(0), and f(–1).
{9x,x−4,x<−1x≥−1
Question 17 options:
f(–3) = –7, f(0) = –0, and f(–1) = 5
f(–3) = –27, f(0) = –4, and f(–1) = 5
f(–3) = –7, f(0) = –4, and f(–1) = –1
f(–3) = –27, f(0) = –4, and f(–1) = –5
Given:
The piecewise function is:
\(f(x)=\begin{cases}9x & \text{ if } x<-1 \\ x-4 & \text{ if } x\geq -1 \end{cases}\)
To find:
The values of \(f(-3),f(0), f(-1)\).
Solution:
In the given piecewise function,
\(f(x)=9x\) for \(x<-1\) and \(f(x)=x-4\) for \(x\geq -1\).
Putting \(x=-3\) in \(f(x)=9x\), we get
\(f(-3)=9(-3)\)
\(f(-3)=27\)
Putting \(x=0\) in \(f(x)=x-4\), we get
\(f(0)=0-4\)
\(f(0)=-4\)
Putting \(x=-1\) in \(f(x)=x-4\), we get
\(f(-1)=-1-4\)
\(f(-1)=-5\)
The required values are \(f(-3)=27,f(0)=-4,f(-1)=-5\).
Therefore, the correct option is D.
******Please help me help please help me ******
Answer:
36
Step-by-step explanation:
Answer:
36
Step-by-step explanation:
A university dean of students wishes to estimate the average number of hours students spend doing homework per week. The standard deviation from a previous study is 6.2 hours. How large a sample must be selected if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1.5 hours
Answer:
The Sample Size Need To be at least 114
Step-by-step explanation:
According to the Question,
Given, A university dean of students wishes to estimate the average number of hours students spend doing homework per week. The standard deviation from a previous study is 6.2 hours.The Maximum Error(E) is given as 1.5 hours and the standard deviation(σ) is 6.2 hours.
Now, For 99% Confident the level of value α is 0.01.α/2 = 0.01/2 ⇒ 0.005
Thus, From The table, We get that the value of \(Z_{alpha/2}\) is 2.58.Hence, the sample size n can be found as
n = {\(\frac{(Z_{alpha/2} * Standard Deviation)}{E}\)}²
n = {2.58 × 6.2}² / 1.5²
n = 113.72 .
So, The Sample Size Need To be at least 114.
please help anyone PLSSSSS with my questions anyone can help me and plsss no links and pls with whole procedure pls
Answer:
In my sketch the angle between their flights is 135°
So wouldn't we just have the cosine law??
x^2 = 120^2 + 150^2 - 2(120)(150)cos135°
carry on, take care with the cos135, since it will be negative
Angles Find the values of x and y
Answer:
15 23
Step-by-step explanation:
Answer:
Step-by-step explanation:
11x - 6 + 15x - 8 = 90
26x - 14 = 90
26x = 104
x = 4
11(4) - 6 = 44 - 6 = 38
13y - 14 + 38= 180
13y + 24 = 180
13y = 156
y = 12
13(12) - 14 = 156 - 14=142
Question 5 of 10
Which of the following graphs represents the equation y- 4 = 3(x - 1)?
А
B
C
5+(2,5)
5
(-1,2)
P(1,4
(1,2)
/(2, 1)
.5
.
5
15
1.2.1)
(1.-2)
(-1.-2)
-5
Answer:
a
Step-by-step explanation:
The winner of a 50 mile race drove his car to victory at a rate of 112.9094 mph. What was his time (to the nearest thousandth of an hour)?
His time was
hours.
(Round to the nearest thousandth.)
Answer:
0.443 hours
Step-by-step explanation:
time = total distance / mph
time = 50 / 112.9094
time ≈ 0.443 hours
Answer:
0.443 hours
Explanation:
Given following:
speed: 112.9094 mphdistance: 50 milesFormula:
\(\sf time \ taken = \dfrac{distance}{speed}\)
Substitute values to find time taken:
\(\sf \rightarrow time = \dfrac{50}{112.9094 }\)
evaluate
\(\sf \rightarrow time = 0.4428329262\)
rounded to nearest thousandth
\(\sf \rightarrow time = 0.443\)
Advertising a business. Bobby Flay is deciding how to advertise a new gourmet restaurant that he is opening. An online ad costs $300, and a TV ad costs $700. He has $7,500 to spend on the ads.
Show all work
The inequality representing the given situation is -
300x + 700y ≤ 7500
What is advertising?Advertising is the practice and techniques employed to bring attention to a product or service. Advertising aims to put a product or service in the spotlight in hopes of drawing it attention from consumers.
Given is that Bobby Flay is deciding how to advertise a new gourmet restaurant that he is opening. An online ad costs $300, and a TV ad costs $700. He has $7,500 to spend on the ads.
We can write the inequality as -
300x + 700y ≤ 7500
where -
{x} - number of online ads posted
{y} - number of TV ads poste
Plot the inequality on the graph. The shaded region represents the possible number of advertisements of each category Bobby can use to advertise.
Therefore, the inequality representing the given situation is -
300x + 700y ≤ 7500
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expand 2x(3x+2y) thank you
Answer:
6x^2+4xy
Step-by-step explanation:
You distribute the 2x by multiplying it with each term
2x(3x)+ 2x(2y)
6x^2+4xy
hopes this helps please mark brainliest
What is the expression in radical form?
(4x3y2)310
Given:
Consider the given expression is
\((4x^3y^2)^{\frac{3}{10}}\)
To find:
The radical form of given expression.
Solution:
We have,
\((4x^3y^2)^{\frac{3}{10}}=(2^2)^{\frac{3}{10}}(x^3)^{\frac{3}{10}}(y^2)^{\frac{3}{10}}\)
\((4x^3y^2)^{\frac{3}{10}}=(2)^{\frac{6}{10}}(x)^{\frac{9}{10}}(y)^{\frac{6}{10}}\)
\((4x^3y^2)^{\frac{3}{10}}=(2)^{\frac{3}{5}}(x)^{\frac{9}{10}}(y)^{\frac{3}{5}}\)
\((4x^3y^2)^{\frac{3}{10}}=\sqrt[5]{2^3}\sqrt[10]{x^9}\sqrt[5]{y^3}\) \([\because x^{\frac{1}{n}}=\sqrt[n]{x}]\)
\((4x^3y^2)^{\frac{3}{10}}=\sqrt[5]{8y^3}\sqrt[10]{x^9}\) \([\because x^{\frac{1}{n}}=\sqrt[n]{x}]\)
Therefore, the required radical form is \(\sqrt[5]{8y^3}\sqrt[10]{x^9}\).
explain 3 factors that should be considered in the construction of index numbers
1. selection of index number: during the construction of index number it is to be kept in mind that the selection of the index number should be correct accordingly.
2. selection of formula: while the construction of index numbers it is compulsory to select the correct formula for the given question.
3. selection of price: selection of prices should be done accordingly while constructing the index numbers.`
construction of index number is also available in two parts:
1. simple
2. weighted
1. simple: the simple method is classified into simple aggregative and simple relative.
2. weighted: the weighted method is classified into a weighted aggregative and weighted average.
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What is the solution to |x-2| + 3 > 17?
Ox<-12 or x > 16
Ox<-14 or x>7
O-12
O-14
Answer:
x<-12 or x>16
Step-by-step explanation:
Answer:
|x - 2| + 3 > 17
|x - 2| > 14
x - 2 < -14 or x - 2 > 14
x < -12 or x > 16
2) How many eggs would be used with 10 tablespoons of water?
A) 8
B)14
C)15
D) 18
Answer:
C
Step-by-step explanation:
Question 8(Multiple Choice Worth 2 points)
(Writing Two-Step Equations MC)
A new gaming chair costs $455.95. You have already saved $155.95 and earn $37.50 each week babysitting. Write and solve an equation to determine how many weeks, w, you must babysit to earn enough money to buy the new gaming chair.
37.5 + 155.95w = 455.95; w = 8
37.5w + 155.95 = 455.95; w = 8
37.5w − 155.95 = 455.95; w = 16
37.5w − 455.95 = 155.95; w = 16
37.5w + 155.95 = 455.95; where w = 8; signifies the number of weeks required to babysit the business in order to purchase the gaming chair.
How do equations work?A mathematical formula that connects two expressions with the equals sign (=) expresses the equality of the two expressions. For instance, in English, an equation is any properly stated formula that consists of two expressions linked by the equals sign, whereas in French, an equation is described as containing one or more variables. To solve a variable equation, identify the values of the variables that cause the equality to hold true. The answer is known as the values of the variables that must satisfy the equality.
Equations can be categorized as identities or conditional equations.
w = (455.95-155.95)/(37.50)
=300/37.50
=8
So, number of weeks = 8
As a result, w = 8 and 37.5w + 155.95 = 455.95 is the solution.
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Need help question #1. Show steps please
Answer:
C
Step-by-step explanation:
We want to integrate:
\(\displaystyle \int\frac{4x^4+3}{4x^5+15x+2}\,dx\)
Notice that the expression in the denominator is quite similar to the expression in the numerator. So, we can try performing u-substitution. Let u be the function in the denominator. So:
\(u=4x^5+15x+2\)
By differentiating both sides with respect to x:
\(\displaystyle \frac{du}{dx}=20x^4+15\)
We can "multiply" both sides by dx:
\(du=20x^4+15\,dx\)
And divide both sides by 5:
\(\displaystyle \frac{1}{5}\, du=4x^4+3\,dx\)
Rewriting our original integral yields:
\(\displaystyle \int \frac{1}{4x^5+15x+2}(4x^4+3\, dx)\)
Substitute:
\(\displaystyle =\int \frac{1}{u}\Big(\frac{1}{5} \, du\Big)\)
Simplify:
\(\displaystyle =\frac{1}{5}\int \frac{1}{u}\, du\)
This is a common integral:
\(\displaystyle =\frac{1}{5}\ln|u|\)
Back-substitute. Of course, we need the constant of integration:
\(\displaystyle =\frac{1}{5}\ln|4x^5+15x+2|+C\)
Our answer is C.
Please help will give BRAINLIEST
Answer:
2nd table
Step-by-step explanation:
Find the 87th term in the following
arithmetic sequence:
-2, 6, 14, 22, ...
Hint: Write a formula to help you.
1st term + common difference (desired term - 1)
Answer:
first term (a)=-2
common difference (d)=8
Now,
87th term=a+(n-1)d
=-2+(87-1)×8
=-2+86×8
=-2+688
=686
Translate the statement: The perimeter (p) of an equilateral triangle is three times of its side (a) into an equation.
❤️
if you help me I give you 50 points.
Answer:
Side of the given equilateral triangle = a
Perimeter of the given equilateral triangle = p
Three times side a = 3
×
a = 3a
Since the perimeter of an equilateral triangle is three times its side length, we can write it as p = 3a.
Step-by-step explanation:
Hii☺❤✌
Can we be flends✌
Carefree offers two type of care packages. The food packages sell for 20$ and the game packages sell for 32$. In one day Carefree sold 25 Care packeges. the receipt for those packages totaled 602$ How many of each type of package were sold
Answer:
Number of game package = 16.5
Number of food package = 8.5
Step-by-step explanation:
LET :
Food package = a
Game package = b
a + b = 25 - - - (1)
20a + 32b = 602 - - - (2)
a = 25 - b
Put a = 25 - b into (2)
20(25 - b) + 32b = 602
500 - 20b + 32b = 602
12b = 102
b = 102 / 12
b = 8.5
a = 25 - b
a = 25 - 8.5
a = 16.5
Number of game package = 16.5
Number of food package = 8.5
A suit was marked with a 10% discount.
If the discount is $16.00, what was the original price of the suit?
Answer:
See below:
Step-by-step explanation:
Hello! My name is Galaxy and I will be helping you today. I hope you are having a nice day.
We can solve the problem in 2 steps, one being Solving and the other being Comprehending. I'll start off with comprehending.
Comprehending
So, we know that 10% of a number is $16. That means that \(\frac{1}{10}\) of the number "\(x\)" is equal to $16.
A percentage is basically a fraction of something, for example, 25% of a number would be \(\frac{1}{4}\) of the same number.
Example:
25% of 10 = \(\frac{1}{4} * 10 = 2.5\)
2.5 is 25% of 10 = \(2.5 \div \frac{1}{4}=10\)
Now that we know the basics, we can do the real solving.
Solving
To solve, the question, we can first read the problem and make an equation,
"10% of \(x\) is 16."
We can then make a equation.
\(x(\frac{1}{10})=16\)
\(x=16 \div \frac{1}{10} \\x=160\)
After solving, we know that 10% of 160 is equal to 16. We can prove that with the following:
\(16*10=160\)
After solving our equation, we can see that the answer is $160.
$16 is 10% of $160.
Cheers!
You pick a card at random. Without putting the first card back, you pick a second card at random. 4 5 6 7 What is the probability of picking a 7 and then picking a 7? Write your answer as a percentage.
The probability of picking a 7 and then picking a 7 is 8.33%.
EquationsSince we are not replacing the first card before drawing the second one, the probability of drawing a 7 on the first card is 1/4. After drawing the first card, there are three remaining cards, and only one of them is a 7. Therefore, the probability of drawing a 7 on the second card given that the first card was a 7 is 1/3.
Using the multiplication rule of probability, the probability of drawing a 7 on the first card and then drawing a 7 on the second card without replacement is
P(7 on the first card) x P(7 on the second card | 7 on the first card) = (1/4) x (1/3) = 1/12
P(7 on the first card and then a 7 on the second card) = 1/12 x 100% = 8.33%
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What is AB in the figure.
Answer:
Sjjsjsdjjdjsjshsskeidbndxkxuxhsnsndhdhsksms
PLEASE HELP!!!
Shade 30% of the whole grid.
How much blocks do i shade?
Answer:
Shade 6
Step-by-step explanation:
There are 20 squares in the grid. Multiply 0.30 (percentages are written as decimals) by 20. There's your answer.
graph y = 6/5x - 6/5
The ordered pairs are (1,0), (2,6/5),(3,12/5)
What is the solution to a linear equation?The solution of a linear equation is defined as the points, in which the lines represent the intersection of two linear equations. In other words, the solution set of the system of linear equations is the set of all possible values to the variables that satisfies the given linear equation.
Given here: The equation as y = 6x/5 - 6/5
putting (1,0) in the equation we get 6×1/5-6/5=0
Similarly we can find the ordered pair as y = 6/5x - 6/5
Hence, The ordered pairs are (1,0), (2,6/5),(3,12/5)
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3. (03.01 MC)
Which expression is equivalent to 3(8 + 7)? (1 point)
24 + 7
24 + 21
11 + 10
11 + 7