The probability of getting at least one question right is 96.875%.
The question states that at least one guess should be right. This ultimately means that all guesses cannot be wrong, which is the only possibility being excluded here.
Probability for wrong guess =12=0.5
Probability for all wrong guesses =0.5*0.5*0.5*0.5*0.5=0.03125 or 3.125%
There is only 3.125% chance of all wrong guesses. Rest of the possibilities are our favorable conditions, i.e. at least one correct guess.
Therefore,
Probability of at least one correct guess=1-0.03125=0.96875 or 96.875%
Learn more about probability here https://brainly.com/question/25870256
#SPJ4
Simplify. (4i+1)^2
show all work
(4i+1)² can be simplified to 8i-15
What is Complex number?A complex number is a number of the form a + bi, where a and b are real numbers
Given expression is (4i+1)²
four times of i plus one whole square.
(4i+1)² can be expanded by using algebraic identity
(a+b)²=a²+b²+2ab
(4i+1)²
Now put a as 4i and b as 1
(4i+1)²=16i²+1+2(4i)(1)
Where i²=-1
=-16+1+8i
=8i-15
Hence (4i+1)² can be simplified to 8i-15
To learn more on Complex numbers click:
https://brainly.com/question/20566728
#SPJ1
Which are correct representations of the inequality –3(2x – 5) < 5(2 – x)? Select two options. x < 5 –6x – 5 < 10 – x –6x + 15 < 10 – 5x A number line from negative 3 to 3 in increments of 1. An open circle is at 5 and a bold line starts at 5 and is pointing to the right. A number line from negative 3 to 3 in increments of 1. An open circle is at negative 5 and a bold line starts at negative 5 and is pointing to the left.
Answer:
The correct statements are:
- 6x + 15 < 10 - 5x ⇒ 3rd answer
Step-by-step explanation
An open circle is at 5 and a bold line starts at 5 and is pointing to the right ⇒ 4th answer
Step-by-step explanation:
∵ The inequality is -3(2x - 5) < 5(2 - x)
At first simplify each side
∵ -3(2x - 5) = -3(2x) + -3(-5)
Remember (-)(-) = (+)
∴ -3(2x - 5) = - 6x + 15
∵ 5(2 - x) = 5(2) + 5(-x)
Remember (+)(-) = (-)
∴ 5(2 - x) = 10 - 5x
∴ - 6x + 15 < 10 - 5x
Subtract 15 from both sides
∴ - 6x < -5 - 5x
Add 5x to both sides
∴ - x < - 5
Remember the coefficient of x is negative, then when you divide both sides by it you must reverse the sign of inequality
∵ The coefficient of x is -1
∴ Divide both sides by -1
∴ x > 5
2x+y=4 1x-y=11 adding subtracting equations to solve systems.
By solving the equations 2x+y=4, x-y=11 we get values x=5/3 and y=2/3
What is meant by an equation?An equation is a formula in mathematics that expresses the equality of two expressions by linking them with the equals sign =. In French, an equation is defined as including one or more variables, but in English, an equation is any well-formed formula consisting of two expressions coupled with an equals sign.
An equation is composed of two expressions joined by an equals sign (=). The expressions on the two sides of the equals sign are referred to as the equation's left-hand side and right-hand side. The right side of an equation is frequently considered to be zero.
Given,
2x+y=4
x-y=1
By solving above two equations we get,
2x+y=4
x-y=1
3x=5
x=5/3
y=-1+x
y=(5/3)-1
y=2/3
Therefore, by solving the equations 2x+y=4, x-y=11 we get values x=5/3 and y=2/3
To know more about equation, visit:
https://brainly.com/question/10413253
#SPJ1
What are some Mathematical Concepts for Slopes and equations? Any kind of help would be much appreciated.
Answer:25256
Step-by-step explanation:
at an academically challenging high school, the average gpa of a high school senior is known to be normally distributed with a variance of 0.45. a sample of 15 seniors is taken and their average gpa is found to be 2.83. assume that and . the 90% confidence interval for the population mean gpa is:
The 90% confidence interval for the population mean gpa is [2.545,3.114].
The confidence interval for population mean is:
µ ± z* . σ/√n
Where, μ is population mean, σ is standard deviation, z* is the value of z-score and n is number of samples.
The z-score value for 90% confidence interval is 1.645.
The average gpa is found to be 2.83, so μ=2.83. The variance is 0.45, it means
σ² = 0.45
σ = √0.45
σ = 0.67
The 90% confidence interval for population mean is:
2.83 ± 1.645 . 0.67/√15
[2.83 - 1.645.0.67/√15 , 2.83+1.645.0.67/√15]
[2.545 , 3.114]
Therefore, the 90% confidence interval for the population mean gpa is :
[2.545 , 3.114]
Learn more about Mean population here:
brainly.com/question/25896797
#SPJ4
the drying times for a certain type of cement are normally distributed with a standard deviation of 62 minutes. a researcher wishes to estimate the mean drying time for this type of cement. find the least sample size needed to assure with 90% confidence that the sample mean will not differ from the population mean by more than 5 minutes.
The least sample size needed to assure with 90% confidence that the sample mean will not differ from the population mean by more than 5 minutes will be 416.16.
What is normal distribution?A normal distribution is a data set design in which the majority of values cluster around the middle of the range and the remainder taper off symmetrically toward either end. Data in a normal distribution are symmetrically distributed and have no skew. The majority of values cluster around a central location, with values decreasing as one moves out from the center. In a normal distribution, the measures of central tendency (mean, mode, and median) are all the same. The normal distribution, like any other probability distribution, defines how the values of a variable are distributed. Because it properly captures the distribution of values for many natural occurrences, it is the most important probability distribution in statistics.
Here,
The z value at the 90 percent confidence interval is 1.645.
t ≥ z*s/√n
5≥1.645*62/√n
√n≥20.398
√n≥20.4
n≥416.16
The smallest sample size required to ensure that the sample mean does not deviate from the population mean by more than 5 minutes with 90% confidence is 416.16.
To know more about normal distribution,
https://brainly.com/question/17199694
#SPJ4
work out the minimum number of hikers who could have walked between 6 miles and 17 miles work out the maximum number of hikers who could have walked between 6 miles and 17 miles
The maximum number of hikers who could have walked between 6 miles and 17 miles is 19.
We need to find the maximum number of hikers who could have walked between 6 miles and 17 miles.
What is meant by minimum and maximum value?When the derivative equals 0, rearrange the function using elementary algebraic principles to find the value for x. The x-coordinate of the function's vertex, which is where the maximum or lowest will occur, is provided in this answer. the solution back into the original function to determine the minimum or maximum.
From the table, we can see
Between intervals 5≤x<10 there are 2 hikers
Between intervals 10≤x<15 there are 9 hikers
Between intervals 15≤x<20 there are 8 hikers
So, total number of hikers = 2+9+8
= 19
Hence, the maximum number of hikers who could have walked between 6 miles and 17 miles is 19.
Learn more about minimum and maximum value here:
brainly.com/question/14993153.
#SPJ1
Christian buys 18 bottles of grapefruit juice at the corner store for a total cost of $15.66. If each bottle costs the same amount, how much is 3 bottles of juice?
Answer:$2.61
Step-by-step explanation:
18=$15.66
÷6 ÷6
3=$2.61
The cost of 3 bottles of juice based on the given ratio will be $2.61.
What are the ratio and proportion?The ratio is the division of the two numbers.
For example, a/b, where a will be the numerator and b will be the denominator.
Proportion is the relation of a variable with another. It could be direct or inverse.
18 bottles cost = $15.66
1 bottle cost = $15.66/18 = $0.87/ bottle
For 3 bottles = 3 × $0.87 = $2.61
Hence "The cost of 3 bottles of juice based on the given ratio will be $2.61".
For more information about ratios and proportions,
brainly.com/question/26974513
#SPJ2
A ditch used to drain storm water has the shape of a trapezoid with the wider base being 24 feet and the height being 6 feet. The shorter base has an unknown length of x-feet. Set up and solve an equation to find the value of x if the drainage ditch as an area of 96 square feet.
The value of the shorter base which is x is 8 feet.
What is a trapezium?A trapezium is a quadrilateral with exactly one pair of opposite sides parallel to each other. The trapezium is a two-dimensional shape that appears as a table when drawn on a sheet of paper.
It has four sides and four vertices.
The trapezium is made of a rectangle and triangles.
Area of a trapezium = 1/2 (a + b ) h
where a = small base, b = big base and h = height.
from the above, b = 24 feet, h = 6 feet, a = x and area = 96 square feet
substituting the above into the equation
1/2 ( 24 + x) x 6 = 96
6(24 + x) = 96 x 2
6(24 + x ) = 192
multiplying the terms by 6
144 + 6x = 192
6x = 192 - 144
6x = 48
x = 48/6
x = 8 feet
In conclusion, the value of x is 8 feet
Learn more about trapezium: https://brainly.com/question/1463152
#SPJ1
The variable p represents number of presents. If it takes 10 feet of ribbon to make 1 bow on a present and 3 feet is used to practice trying the bow, the expression 10p + 3 can be used. If there are 7 presents, how much ribbon is needed? Ribbon is sold in 15 feet packages. How many do you need to buy?
The number of ribbons that is needed for 7 presents is 73 ribbons.
She needs 5 packages.
What is an expression?An expression is simply used to illustrate the relationship between the variables.
In this case, it takes 10 feet of ribbon to make 1 bow on a present and 3 feet is used to practice trying the bow, the expression 10p + 3 can be used.
The ribbons needed for 7 presents will be:
= 10p + 3
= 10(7) + 3
= 70 + 3
= 73
Since it's sold in 15 feet packages, the number needed will be:
= 73 / 15
= 5
Learn more about expressions on:
brainly.com/question/723406
#SPJ1
PLS ANSWER THIS Solve the following system of equations for all three variables.
The values of x, y and z are 4, 1 and - 6 respectively.
What is the general equation of a Straight line? What is a system of equations in two or three variable.The general equation of a straight line is -
[y] = [m]x + [c]
where -
[m] is slope of line which tells the unit rate of change of [y] with respect to [x].
[c] is the y - intercept i.e. the point where the graph cuts the [y] axis.
A system of equations is a set of one or more equations involving a number of variables. The solutions to systems of equations are the variable mappings such that all component equations are satisfied
We have the following equations -
8x + y + 4z = 9
4x - 3y + z = 7
8x - 4y + 5z = - 2
We have -
4x - 3y + z = 7
z = 7 - 4x + 3y
We can write -
8x + y + 4z = 9
as -
8x + y + 4(7 - 4x + 3y) = 9
8x + y + 28 - 16x + 12y = 9 ...Eq[1]
and we can write -
8x - 4y + 5z = - 2
8x - 4y + 5(7 - 4x + 3y) = -2
8x - 4y + 35 - 20x + 15y = - 2 ...Eq[2]
Plot the graph of equation [1] and [2]. We will will get -
x = 4
y = 1
Now -
z = 7 - 4x + 3y
z = 7 - 16 + 3
z = - 6
Therefore, the values of x, y and z are 4, 1 and - 6 respectively.
To solve more questions on system of equations, visit the link below-
https://brainly.com/question/21620502
#SPJ1
Find the total area for the shape!!
Answer:
56cm²
Step-by-step explanation:
Because this is an irregular shape, you have to split it into two shapes and find the area of each one. Then you can add those two areas together to find the total area of the figure. There are many ways you can split it but the way I did it left me with the equation (12·3)+(4·5). Then all you have to do is multiply and add which will give you a total of 56cm².
Jayce is a taxi driver.
M(n) models Jayce's fee (in dollars) for his nth drive on a certain day.
What does the statement M(10) = K mean?
Choose 1 answer:
A
Jayce's fee for his Kth drive is equal to $10.
(B)
Jayce's fee for his 10th drive is equal to K dollars.
The correct answer is C. Jayce's fee for his 10th drive is equal to K dollars.
Based on the mentioned statements, n refers to the number of drives in a certain day. Additionally, it is mentioned that M(n) models the fee in dollars. As is seen in the equation, M(n) is equal to K. Thus, the fee in dollars is K dollars.
Now, as n is ten, thus the drive is tenth. And the fees for tenth drive is K dollars. So, the third option is correct, which states that Jayce's fee for his tenth drive is equal to K dollars.
Learn more about equations -
https://brainly.com/question/21405634
#SPJ4
please help!!
the function shown in the graph is f(x)= ???
Answer:
The answer is x^{3}-2x^{2}-5x+6
Step-by-step explanation:
This is because only a Cubic Function would have such a shape. That leaves x^3 functions from there just substitute points and check
David picked 15 pears. Jenna picked p fewer pears than David. Write an expression that shows how many pears Jenna picked.
Answer:
15-p
Step-by-step explanation:
15-p
The function f(x) is given in the graph below. Find its average rate of change between the followin
points. Show the calculations that lead to your answer.
(a) x=-6 to x = 4
(b) x=-2 to x=2.
a) x = -6 to x =4
[tex](x_{1} , y_{1} ) (x_{2} , y_{2} ) = (-6,1) (4,3)[/tex]
Slope(m)[tex]= \frac{Y_{2}-Y_{1}}{x_{2}-x_{1}}[/tex]
[tex]= \frac{1-3}{-6-4-}[/tex]
[tex]= \frac{-2}{-10}[/tex]
[tex]m = \frac{1}{5}[/tex]
Slope (m) of the function is 1/5.
b) x = -2 to x = 2
[tex](x_{1} , y_{1} ) (x_{2} , y_{2} ) = (-2,-1) (2,-3)[/tex]
slope (m)[tex]= \frac{Y_{2}-Y_{1}}{x_{2}-x_{1}}[/tex]
[tex]= \frac{-3-(-1)}{-2-2}[/tex]
[tex]= \frac{-2}{-4}[/tex]
slope(m) [tex]= \frac{1}{2}[/tex]
Slope(m) of the given function is 1/2.
What is fraction ?
A fraction is a part of a whole. In arithmetic, the number is expressed as a quotient, in which the numerator is divided by the denominator.
In a simple fraction, both are integers.
A complex fraction has a fraction in the numerator or denominator.
In a proper fraction, the numerator is less than the denominator.
Define slope(m)?
The slope of a line is a measure of its steepness. Mathematically, slope is calculated as "rise over run" (change in y divided by change in x).
Learn more about function here:
https://brainly.com/question/25638609
#SPJ13
on saturday leon biked an average speed of 14.5 miles per hour for 1.5 hours. then on sunday he biked an average speed of 15 miles per hour for 2.75. what was the total distance leon biked in miles that weekend
The total distance leon biked in miles that weekend is 19.5 miles.
The answer provided below has been developed in a clear step by step manner.
On Saturday, Leon biked 1.5 hours at a speed of 14.5 miles per hour that means distance = 14.5 * 1.5 = 21.75 miles
On Sunday, he biked 2.75 hours at a speed of 15 miles per hour that means distance =15 * 2.75 =41.25 miles
Distance = speed*time use this formula
He farther did in sunday = 41.25 - 21.75 miles = 19.5 miles
Therefore, that weekend Leon rode his bike a total of 19.5 miles.
Learn more about Distance :
brainly.com/question/18246609
#SPJ4
Write and Solve the equation: A printing company charges $0.15 per copy in addition to a service fee of $3. Write an equation to represent the cost, y, the company charges for x numbers of copies. How much would 250 copies cost?
The equation representing the cost is y = 0.15x + 3 where x ix the number of copies and y is total cost.
Cost for 250 copies is $40.5
What is equation?The definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.
Given that, a printing company charges $0.15 per copy in addition to a service fee of $3,
Therefore, according to question, the total cost y for printing x copies is,
y = 0.15x + 3
For x = 250
y = 0.15*250 + 3
y = $40.5
Hence, The equation representing the cost is y = 0.15x + 3 where x ix the number of copies and y is total cost.
Cost for 250 copies is $40.5
For more references on equation, click;
https://brainly.com/question/11897796
#SPJ1
The graphing calculator screen below represents time on the horizontal axis and the speed of an object on the vertical axis.
The data graphed on the screen indicates which of the following about an object?
The object was at rest, then began moving, and then stopped.
O The object moved at a constant speed, then sped up, and then stopped.
O The object was at rest, then began moving, and then slowed down.
O The object moved at a constant speed, then sped up, and then moved at a constant speed again.
Check the picture below.
in right angles , side of all angles. how am I supposed to know what is adjacent to angle I'm trying to find and what is opposite from it.
I know the hypotenuse because it is the biggest one
125 = 7m - 1 please answer
Answer:
m=18
Step-by-step explanation:
which statements is true of the function f(x)= x2 + 6x3 - 4 + 2x5?
A. the function is positive for all values of x
B. the end behavior of the graph f(x) is similar to that of g(x) = -x
C.the graph has exactly one x-intercept
D. the function is increasing for all real numbers
The statements is true of the function f(x)= x^2 + 6x^3 - 4 + 2x^5 is C.the graph has exactly one x-intercept
How to show that the function has one interceptIt is shown that the function has one intercept in the x direction by plotting the graph of the polynomial
The graph showed one x intercept is at the coordinate (0.778, 0)
x intercept refers to the value of x when y is zero
The graph is plotted and attached
Learn more about x intercept here:
https://brainly.com/question/29461321
#SPJ1
describe a situation that could be represented by f(x) // pls help
Answer: “y is a function of x.” The letter x represents the input value or independent variable. The letter y, or f(x), represents the output value, or dependent variable.
Step-by-step explanation:lol i have no idea
Which equation represents a line that is parallel to the line y = -2/3x + 5? Pls Hurry :/
The equation of the line parallel to the equation y = - 2 / 3 x + 5 is 2x - 3y = 21
How to find the equation of a line?The equation of a line can be represented in different form such as slope intercept form, point slope form, standard form and general form.
Lines are parallel when they have the same slope.
Using slope intercept form,
y = mx + b
where
m = slopeb = y-interceptTherefore,
y = - 2 / 3 x + 5.
The slope of the equation is - 2 / 3.
Hence, let's find the equation that has the same slope as - 2 / 3. First, we will have to represent the equation in slope intercept form.
2x - 3y = 21
add 2x to both sides of the equation
2x + 2x - 3y = 21 + 2x
- 3y = 2x + 21
divide both ides by - 3
- 3y / - 3 = 2x / -3 + 21 / - 3
y = - 2 / 3 x - 7
Therefore, the slope is - 2 / 3 , the equation is 2x - 3y = 21
learn more on equation here: https://brainly.com/question/24394330
#SPJ1
Write the equation of the graph shown below in factored form.
a graph that starts at the top left and continues down through the x axis at negative one to a minimum around y equals negative twelve point two five and goes up to touch the x axis at two and the goes back down to a minimum around y equals negative one half and goes back up through the x axis at two.
f(x) = (x − 2)2(x + 1)(x − 3)
f(x) = (x + 2)2(x − 1)(x + 3)
f(x) = (x + 2)2(x + 1)(x + 3)
f(x) = (x − 2)2(x − 1)(x − 3)
The answer is
f(x) = (x - 1) 2(x +1)(x - 3 ).
Given equation
f(x) = (x − 2)2(x + 1)(x − 3)
f(x) = (x + 2)2(x − 1)(x + 3)
f(x) = (x + 2)2(x + 1)(x + 3)
f(x) = (x − 2)2(x − 1)(x − 3)
Factored form is a product of stayed and linear elements.
by checking of the red line cross the x-axis.it will give you the zero.
it passes at -1, touches at 1, and crosses again at 3.
This implies that the zeroes are -1, 1 and 3.
The factors 2(x+1), (x - 3), and (x - 1) must be evaluated.
Therefore the answer is
f(x) = (x - 1) 2(x +1)(x - 3 ).
To learn more about Factored
https://brainly.com/question/24182713
#SPJ1
help meeeeeeeeeeee pleaseeeeeeeeeee rn rnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
help meeeeeeeeeeee pleaseeeeeeeeeee rn rnnnnnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The curve -3[tex]x^{2}[/tex] + 18x +3 has a maximum value of 30 at x = 3
What is a maximum point?In mathematics, a point at which a function’s value is greatest. If the value is greater than or equal to all other function values, it is an absolute maximum. if it is merely greater than any nearby point, it is a relative, or local, maximum. In calculus, the derivative equals zero or does not exist at a function’s maximum point.
Differentiate f(x) = -3[tex]x^{2}[/tex] + 18x +3 ,
we have dy/dx = -6x + 18.
at turning point, dy/dx = 0
-6x + 18 = 0
6x = 18
x =18/3
x = 3
to check if x = 3 is a minimum or maximum point, we take the second derivate
which is [tex]\frac{d^{2}y }{dx^{2} }[/tex] = -6
since [tex]\frac{d^{2}y }{dx^{2} }[/tex] < 0
F(x) is a maximum,
so maximum value of x, we substitute x = 3 into the function
f(x) = -3[tex](3)^{2}[/tex] + 18(3) + 3
f(x) = 30
In conclusion, the maximum value for the function is 30 at x = 3
Learn more about maximum and minimum points: https://brainly.com/question/14993153
#SPJ1
a 61 mg of a vaccine is given to a patient to prevent measles. the vaccine leaves the body at a rate of 6.1% per hour. define a function g that gives the mass of the vaccine remaining in the body, v, in terms of the number of hours, n since the vaccine was administered. how much of the vaccine remains in the body 24 hours after it was administered? mg use your graphing calculator to determine how many hours passed before there were only 5mg of the vaccine remaining in the body.
The linear equation that represent the amount vaccine that remain is g = 61 - 0.061n. The vaccine remains in the body 24 hours after it was administered 59.536 mg. There were only 5mg of the vaccine remaining in the body after 918.033 hours.
What is rate?
A rate is a unique ratio where the two words are expressed in several units.
Given that the amount of vaccine is 61 mg.
The vaccine leaves the body at a rate of 6.1% per hour.
After 1 hour the body will consume 6.1% = 6.1/100 = 0.061 mg.
After n hour the body will consume 6.1%× n = 0.061n mg.
The remaining amount of vaccine is (61 - 0.061n).
The required linear equation that represent the remaining amount of vaccine is g = 61 - 0.061n.
Putting n =24 in the equation:
g = 61 - 0.061×24
g = 59.536 mg
The vaccine remains in the body 24 hours after it was administered 59.536 mg.
The graph represents that there were only 5mg of the vaccine remaining in the body after 918.033 hours.
To learn more about linear equation, you can visit:
https://brainly.com/question/24085666?
#SPJ4
Please help! I need help solving this final problem for geometry.
Translate the expression “the product of triple a number and 19”
Answer: 3x+19
Step-by-step explanation:
suppose for a particular week, the forecasted sales were $4,000. the actual sales were $3,000. what is the value of the mean absolute percentage error?
The mean absolute percentage error is 33.3%
The mean absolute percentage error measures the forecast accuracy by determining how well a particular forecasting method is able to reproduce the time series data that are already available.
This method is referred to as the forecasts of accuracy, which help to measure the number of errors that are in a former forecast.
Then this would factor these errors into a new forecast while making adjustments to the new forecast.
Forecasted sales were $4,000
Actual sales were $3,000
Absolute error = |Actual sales - Forecasted sales|
= |3,000-4,000|
= 1000
Mean Absolute error percentage = (Absolute error / Actual sales) *100%
=(1000/3000)*100
= 33.33%
Hence, The Mean Absolute error percentage is 33.3%
To learn more about Forecasting methods visit:
https://brainly.com/question/14950685
#SPJ4
