The test statistics value is 0.380
What is the standard deviation?
A standard deviation is a measurement of the data's dispersion from the mean. Data are grouped around the mean when the standard deviation is low, and are more dispersed when the standard deviation is high.
Standard deviation It is a measure of how spread out numbers are. It is the square root of the Variance, and the Variance is the average of the squared differences from the Mean.
For example: To find the standard deviation, you have to add up all the numbers in the data set, then divide by how many numbers there are, and that will get you your answer.
Formula:
t=(mean-time)/(standard deviation/√(number of students) )
=( 12 - 11.8) / (1.9 / √13 )
= 0.380
This is test statistics value.
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Find the quotient and write the answer in simplest form 2 4/3 ÷1 8/7 =
first off let's convert the mixed fractions to improper fractions and then divide.
[tex]\stackrel{mixed}{2\frac{4}{3}}\implies \cfrac{2\cdot 3+4}{3}\implies \stackrel{improper}{\cfrac{10}{3}} ~\hfill \stackrel{mixed}{1\frac{8}{7}}\implies \cfrac{1\cdot 7+8}{7}\implies \stackrel{improper}{\cfrac{15}{7}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{10}{3}\div \cfrac{15}{7}\implies \cfrac{10}{3}\cdot \cfrac{7}{15}\implies \cfrac{10}{15}\cdot \cfrac{7}{3}\implies \cfrac{2}{3}\cdot \cfrac{7}{3}\implies \cfrac{14}{9}\implies 1\frac{5}{9}[/tex]
K
The voltage V of an audio speaker can be represented by V=2√P, where P is the power of the speaker. An engineer wants to design a speaker with 576 watts of power. What will
the voltage be?
volts
According to the given voltage function, the value of the voltage for the power of 576 watts is 48 watts.
Function:
The relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output.
Given,
The voltage V of an audio speaker can be represented by V=2√P, where P is the power of the speaker. An engineer wants to design a speaker with 576 watts of power.
Here we need to find the voltage of the given power.
In the given question we have the voltage function
v = 2√P
Where P refer the power of the speaker.
Here we have to find the voltage if engineer wants to design a speaker with 576 watts of power.
Which means the value of P is 576.
Then the value of V is calculated as,
v = 2 √576
We know that the value of √576 = 24,
So,
v = 2 x 24
v = 48.
Therefore, the voltage is 48 watts.
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PLEASE HELP
If Janice is building a garden and the perimeter is 20 (P = 20) and the length is 4 (L = 4), find w (the width)
Answer:
w = 6 units
Step-by-step explanation:
The perimeter is found by adding all the sides of a rectangle. The perimeter can be found using this equation:
[tex]P=2w+2l[/tex]
Where w represents width and l represents length.
To find the width, rearrange the equation so it is in terms of w:
[tex]P=2w+2l\\2w=P-2l\\w=\frac{P-2l}{2}[/tex]
Now, plug in the known values!
[tex]w=\frac{20-2(4)}{2}[/tex]
Simplify!
[tex]w=\frac{12}{2} \\w=6[/tex]
x + 3/5 = 6 1/2 solve for x
Answer:
x = 59/10 aka 5 9/10 or 5.9
Step-by-step explanation:
Answer:
X= 59/10
Step-by-step explanation:
First, we can turn 6 1/2 into a improper fraction (when the numerator is greater than the denominator)
So,
[tex]6\frac{1}{2}[/tex]
Turns into
[tex]\frac{13}{2}[/tex]
Now we have:
[tex]X+\frac{3}{5} =\frac{13}{2} \\\\[/tex]
Next, we subtract 3/5 from both sides of the equation which equals:
[tex]X =\frac{13}{2}-\frac{3}{5} \\\\[/tex]
Simplify we get:
[tex]X= \frac{59}{10}[/tex]
or X = 5.9
Sally and anne went to the movies. They each purchased a drink. They also bought one popcorn and one veggie cup to share. Which expression can be used to find how much money each woman spent? one-half (9 + 1. 35 + 3. 50 + 1. 74) 9 + 1. 35 + one-half (3. 50 + 1. 74) 18 + 2. 70 + one-half (3. 50 + 1. 74) 9+1. 35+2(3. 50+1. 7).
Expression which represents the amount of money spend by each woman is equal to [ 9 + 1.35 + (one- half)(3.50 + 1.74)].
As given in the question,
Condition for the expression:
Sally and Anne both went for a movie.
Each one purchased a drink.
Shared one popcorn and one veggie bought by them.
Consider movie ticket price = 9
drink price = 1.35
Popcorn price = 3.50
Veggie price = 1.74
Explanation for different expressions are:
1. one-half (9 + 1. 35 + 3. 50 + 1. 74)
Here sum of all the amount is divided equally, which is not correct as movie ticket and drink they have purchased individually.
2. 9 + 1. 35 + one-half (3. 50 + 1. 74)
This is correct option as it represents :
Movie ticket price = 9
Drink = 1.35
one-half (3. 50 + 1. 74) = one popcorn and one veggie divided equally.
3. 18 + 2. 70 + one-half (3. 50 + 1. 74)
As per consideration of price this is not correct option.
Movie ticket price =18
Drink = 2.70
one-half (3. 50 + 1. 74) = one popcorn and one veggie divided equally.
4. 9+1. 35+2(3. 50+1. 7)
This is not correct option as popcorn and veggie price is doubled.
Therefore, expression which represents the amount of money spend by each woman is equal to [ 9 + 1.35 + (one- half)(3.50 + 1.74)].
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Which of the following explains why (x + 3) = (x − 6))
has no solution?
Answer:
The is no number that I can substitue in for x to make the statement true.
Step-by-step explanation:
s + 3 = x -6 Subtract x from both sides
3 = -6 We get a false statement.
Please fill in the missing blanks! I will give brainly to the best!
Answer:
1. 0
2. 7
3. -2
4. 10
5. -7
6. -8
7. -2
8. -6
9. -4
10. -5
11. 2
12. -9
13. -9
14. -9
Step-by-step explanation:
If the graph shows (3, 1) what is the constant of proportionality 
Answer:
The constant of proportionality is 1/3Step-by-step explanation:
Proportional relationship equation:
y = kx, where k - constant of proportionalityUse the given point (3, 1) to find the value of k:
1 = 3kk = 1/3Answer:
k = 1/3
Step-by-step explanation:
Now we have to,
→ find the constant of proportionality.
Formula we use,
→ y = kx
The constant of proportionality is,
→ y = kx
→ 1 = k × 3
→ 3k = 1
→ [ k = 1/3 ]
Hence, required answer is 1/3.
After one day, you read 40 pages of a book. On each
following day, you read 10 more pages.
Write an equation in point-slope form to model the number
of pages you have read, y, after a days.
Then use your equation to determine the number of pages
of the book will you have read after 9 days.
pages
The equation of the number of pages is y = 40 + 10x and for 9 days, you read 130 pages
How to determine the equation of the number of pages?From the question, we have
Initial number of pages = 40
Rate per day = 10 pages per day
The equation of the number of pages is then represented as
y = Initial number of pages + Rate per day x Number of days
Substitute the known values in the above equation, so, we have the following representation
y = 40 +10 * x
Evaluate
y = 40 + 10x
For 9 days, we have
x = 10
This gives
y = 40 +10 * 9
Evaluate
y = 130
Hence, the number of pages is 130
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Write an inequality that represents the graph below
please help!!!!
Answer:
x < 0
Step-by-step explanation:
You want an inequality that represents the number line graph with an open circle at 0 and shading to the left.
End pointThe end point of an interval on a number line graph is indicated by either an open circle or a filled circle (dot). The circle is open if that end point is not included in the set being graphed. If the end point is included, then the circle is filled to become a solid dot.
The circle at x=0 on this graph is an open circle, so x=0 is not part of the solution set.
ShadingThe shading on the number line indicates the values that are included in the solution set. Here, shading is to the left of x=0, so includes all values less than 0. This is written as the inequality ...
x < 0
__
Additional comment
If you write number-line intervals using the left-pointing symbols < or ≤, then the location of x relative to the symbol is the same as the location of the shading relative to the end point.
Here, shading is to the left of 0, so we can write the inequality ...
x < 0
where x is to the left of 0 in the inequality expression. (As we said above, we use < for the open circle. ≤ is used for a filled dot.)
in the diagram below of triangle KLM, N is the midpoint of KM and O is the midpoint of LM if NO equals 3+ 7X and KL equals 4X +16 what is the measure of no
If O is the midpoint of LM and N is the midpoint of KM then the measure of NO is 10.
What are Linear equations?Linear equations are a combination of constants and variables where the value of the variable is calculated using mathematical operations.
We have given that Triangle KLM, N is the midpoint of KM and O is the midpoint of LM if NO equals 3+ 7X and KL equals 4X +16, we are supposed to find the measure of NO.
Using the Midpoint theorem, we can say that in Triangle KLM;
NO = KL / 2
Substituting values,
3+ 7X = 4X +16/ 2
3+ 7X = 2X + 8
7x - 2x = 8 - 3
5x = 5
x = 1
NO = 3+ 7X
NO = 3+ 7(1) = 10
NO equals 10
Hence the measure of NO is 10.
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Find the coordinates of point P that lies on the line segment MQ. M(-5, 3), Q(4. 9), and partition the segment at a ratio of to 3. Graph line segment MG and Pin the coordinate plane.
The coordinates of point P that lies on the line segment MQ is P(-11/4 , 9/2).
Given:
M(-5, 3), Q(4, 9), and partition the segment at a ratio of 1 : 3.
(x1,y1) and (x2,y2) in the ratio m:n then,
(x,y) = (mx2+nx1 / m+n , my2+ny1 / m+n)
= (1*4+3*-5 / 1+3 , 1*9+3*3 / 1+3
= (4 - 15 / 4 , 9 + 9 / 4)
= (-11/4 , 18/4)
= (-11/4 , 9/2)
Therefore the coordinates of point P that lies on the line segment MQ is P(-11/4 , 9/2).
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A rectangle has length 72 cm and width 56 cm. A second rectangle has the same area as this one, but its width is 21 cm. Do these quantities (length and width) vary directly or inversely?
The length and the width vary inversely.
What is variation?A variation is a relation between a set of values of one variable and a set of values of other variables.
In the equation y = mx + b, if m is a nonzero constant and b = 0, then you have the function y = mx (often written y = kx), which is called a direct variation.
If first rectangle length = 72cm and width = 56cm
Then, area = length x width = 72 x 56 = 4032[tex]cm^{2}[/tex]
If length of second rectangle = x
and width = 21
Area of second rectangle = 21x
so both areas are equal, which means
21x = 4032
x = 4032/21
x = 192cm
Since the first rectangle had a width of 56cm and length, 72 and second rectangle has a reduced width 21 cm and an increased length 192cm. it means that the length and the width vary inversely since the reduction in width led to an increase in length.
In conclusion, the two quantities length and width vary inversely.
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What is the slope? (15,-4) & (-50,16)
1000,500,250,125 arithmetric, geometric, or neither
Answer:
[tex] G [/tex]eometric.
Step-by-step explanation:
To get the common ratio in a Geometric Progression (GP), T2/a(T1). a(T1) = 1000, T2 = 500.
So, 500/1000 = 1/2. Therefore, common ratio = 1/2
Now, multiply by the the given term to find the next term i.e
1/2 × 1000 = 500, 1/2 × 500 = 250, 1/2 × 250 = 125, 1/2 × 125 = 62.5, etc.
I hope this helpsIf an arena charges $7. 50 to park in satellite parking and $12. 00 to park in an arena lot, how much will be made from parking 11,000 vehicles at the arena and 4,600 in satellites?.
Parking 11,000 automobiles at the venue and 4,600 in satellites will bring in total $166,500.
Define multiplication.One of the four fundamental mathematical operations, along with addition, subtraction, and division, is multiplication. Multiply in mathematics refers to the continual addition of sets of identical size. Let's use the ice creams as a multiplication example to help us comprehend. There are two such groupings, and each group has ice cream.
Given,
If an arena charges $7. 50 to park in satellite parking and $12. 00 to park in an arena lot,
Multiplying:
$7.5 x 4,600 = satellite parking
$34,500 = satellite parking
The next step is to determine how much it will cost to park in the arena lot.
$11,000 ×12 = arena lot
$32,000 = arena lot
Let's now calculate the entire revenue from parking.
Total earnings equal $132,000 + $34,500.
Amount made in total is $166,500.
In conclusion Parking 11,000 automobiles at the venue and 4,600 in total satellites will bring in $166,500.
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Find the absolute value of the complex number.
3i - 2
Absolute value of Complex Number -2 + 3i is [tex]\sqrt{13}[/tex]
Absolute value of complex number:
z = x + iy is the general form of the complex number where x is real part and y is the imaginary part.
If we talk about absolute value of complex number z = x + iy then it is represented by |z| = |x + iy|.It is also rad as modulus of z.Absolute value is always going to be a positive value.
and,
|z| = |x + iy|
= [tex]\sqrt{x^{2} + y^{2} }[/tex]
Now,
We have to find the absolute value of complex number, 3i - 2
z = 3i - 2
= -2 + 3i
Absolute value of z is,
|z| = | -2 + 3i |
= [tex]\sqrt{(-2)^{2} + 3^{2} }[/tex]
= [tex]\sqrt{4 + 9}[/tex]
= [tex]\sqrt{13}[/tex]
Thus,
Absolute value of Complex number -2 + 3i is [tex]\sqrt{13}[/tex]
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can someone help me, please?
Answer:
I would say answer D is correct since it is closest to 1,760 yards.
Step-by-step explanation:
;)
The table shows the closing stock prices of a new energy company for the past 5 days. One of the closing prices is
missing from the table.
Day
Monday
Tuesday
Wednesday
Thursday
Friday
OB. $53.88
If the 5-day simple moving average was $54.27, what was the closing price on Thursday?
OA $53.78
O C. $54.27
►
OD $56.24
Closing Price
$52.45
$53.18
$52.37
?
$57.11
If the 5-day simple moving average was $54.27, then the stock's closing price on Thursday was $56.24.
The table shows the closing stock prices of a new energy company for the past 5 days. One of the closing prices is missing from the table. The 5-day simple moving average is $54.27. The closing price of the stock on Monday, Tuesday, Wednesday, and Friday was $52.45, $53.18, $52.37, and $57.11. We need to find the closing price on Thursday. Let the missing value of the stock price be denoted by the variable "x". The average is the sum of all the values divided by the total number of values. We can solve the given equation.
A = (52.45 + 53.18 + 52.37 + x + 57.11)/5
54.27 = (52.45 + 53.18 + 52.37 + x + 57.11)/5
54.27*5 = (52.45 + 53.18 + 52.37 + x + 57.11)
271.35 = 215.11 + x
x = 271.35 - 215.11
x = 56.24
Hence, the closing price of the stock on Thursday is $56.24.
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Graph the image of DEF after a rotation 180 counterclockwise around the origin
The point we get after 180 degree clockwise rotation is E' (-3,-1)
When rotating 180° clockwise about the origin the coordinates of the image will be the same x and y numbers but the opposite sign of the pre-image.
Using the above as an example, pre-image E is located at (3,1) so the rotated image would be E' (-3,-1).
Pre-image D is located at (-1,3) so the rotated image would be D' (1,-3).
Pre-image F is located at (2,-2) so the rotated image would be F' (-2,2).
Hence we get the required point.
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Calculate the next two terms in each of these Fibonacci-type sequences.
a) 1, 4, 5,
5, 9,
o task
b) 2,
9, 14, ...
4, 6, 10, 16,
Watch video
Ans
The next two tems of the Fabonacci sequence are (a) 14, 23 (b) 23, 37 (c) 26, 42.
What is Fabonacci type sequence ?
The first two terms are already defined in the this sequence. The nth term of a Fabonacci type sequence is given by the following expression:
[tex]F_n=F_{n-1}+F_{n-2}[/tex]
(a)
In this case 5 terms are given hence, calculate the 6th term.
[tex]F_6=F_5+F_4\\F_6=9+5\\F_6=14[/tex]
Now, calculate the 7th term.
[tex]F_7=F_6+F_5\\F_7=14+9\\F_7=23[/tex]
(b)
Calculate the 4th term.
[tex]F_4=F_3+F_2\\F_4=14+9\\F_4=23\\[/tex]
Calculate the 5th term.
[tex]F_5=F_4+F_3\\F_5=23+14\\F_5=37[/tex]
(c)
The series is 4, 6, 10, 16, ...
[tex]F_5=F_4+F_3\\F_5=16+10\\F_5=26[/tex]
[tex]F_6=F_5+F_4\\F_6=26+16\\F_6=42[/tex]
Hence, the next two tems of the Fabonacci sequence are (a) 14, 23 (b) 23, 37 (c) 26, 42.
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Round 1.735 to the nearest hundredth.
The value of 1.735 to nearest hundred is 1.74.
What is nearest hundredth form?
The second digit following the decimal point is the nearest hundredth.
The last digit of the fractional part of 1.735 should be eliminated if it is less than 5 in order to complete the calculation. and If the fractional part of 1.735 has a last digit that is 5 or more and a second digit that is less than 9, we will add 1 to the second digit of a fractional part and remove the third digit. If the fractional part of 1.735 has a last digit that is 5 or greater, a second digit that is 9, and a first digit that is 9, then you can add 1 to the integer part to make the fractional part 00.
Hence, The hundredth form is 1.74.
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Phil invests £800 for 3 years in a bank account. The account pays simple interest at a rate of 2% per year. Work out the total amount of interest Phil has got at the end of 3 years.
Phil invests £800 for 3 years at the rate of 2% then the total amount after 3 years is £848.
What is Simple interest?The simple interest method, which adds interest to the starting principal amount at the same rate every day, is a quick and easy technique to calculate the interest on that money.
Simple interest is a way to calculate the amount of interest that will be charged on a certain amount of money at a certain rate and for a certain period of time.
As per the given information in the question,
Principal amount, P = £800
Time, T = 3 years.
Rate, R = 2%
[tex]SI=(Principle*Rate*Time)/100[/tex]
SI = (800 × 2 × 3)/100
SI = 4800/100
SI = £48
Then, the total amount at the end of 3 years,
= £48 + £800
Total amount = £848
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rectangles beneath a semicircle a rectangle is constructed with its base on the diameter of a semicircle with radius 5 and its two other vertices on the semicircle. what are the dimensions of the rectangle with maximum area
Using the area of rectangle, the dimensions of the rectangle with maximum area are 5√2 and 5/√2.
In the given question we have to find the dimensions of the rectangle with maximum area.
Given Semicircle Radius is 5.
As we know that standard equation of circle is [tex]x^2+y^2=a^2[/tex]
a=5, so the equation is [tex]x^2+y^2=(5)^2[/tex]
[tex]x^2+y^2=25[/tex]
Therefore, Half circle y=[tex]\sqrt{25-x^2}[/tex]
Area of Rectangle(A) =xy
Because Half of the rectangle is lies in first quadrant and half lies in second quadrant
Therefore,
Area of Rectangle(A) = 2xy
Now putting the value of y
Area(A) = 2x[tex]\sqrt{25-x^2}[/tex]
Here we need to maximize the area of Rectangle, so find derivative and set equal to zero.
A'= [tex]\frac{d}{dx}(2x\sqrt{25-x^2})[/tex]
A'= 2[tex][x\frac{d}{dx}\sqrt{25-x^2}+\sqrt{25-x^2}\frac{d}{dx}x][/tex]
A'= 2[tex][x\cdot\frac{-x}{\sqrt{25-x^2}}+\sqrt{25-x^2}\cdot1][/tex]
A'= 2[tex][\frac{-x^2}{\sqrt{25-x^2}}+\sqrt{25-x^2}][/tex]
A'= 2[tex](\frac{-x^2+25-x^2}{\sqrt{25-x^2}})[/tex]
A'= 2[tex](\frac{25-2x^2}{\sqrt{25-x^2}})[/tex]
For critical Number A' = 0
2[tex](\frac{25-2x^2}{\sqrt{25-x^2}})[/tex] = 0
25-2x^2 = 0
2x^2=25
x^2=25/2
x=±√25/2
x=±5/√2
Therefore,
Base of the Rectangle = 2x
Base of the Rectangle = 2×5/√2
Base of the Rectangle = 5√2
and
height of rectangle = [tex]\sqrt{25-x^2}[/tex]
height of rectangle = [tex]\sqrt{25-(5/\sqrt{2})^2}[/tex]
height of rectangle = [tex]\sqrt{25-(25/2)}[/tex]
height of rectangle = √(50-25)/2
height of rectangle = √25/2
height of rectangle = 5/√2
Hence, the dimensions of the rectangle with maximum area are 5√2 and 5/√2.
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This Bread Recipe makes 2 loaves of bread. How much of each ingredient would be needed to make 13 loaves?
warm water 2 cups
white sugar 1/2 cup
dry yeast 1 1/2 teaspoons
salt 1/2 teaspoon
vegetable oil 1/4 cup
flour 5 cups
**Put in your answers as a decimal.*
warm water
cups
white sugar
cups
dry yeast
teaspoons
salt
teaspoon
vegetable oil
cups
flour
cups
Answer:
Step-by-step explanation:
let's go back to making 1 loaf.
1 cup water 1*x1
1/4 cup white sugar 1/4*x2
3/4 teaspoon dry yeast 3/4*x3
1/4 teaspoon salt 1/4*x4
1/8 cup vegetable oil 1/8*x5
2.5 cup flour 5/2*x6
now just multiply by 13 :)
13*x1 cups water 13
13/4*x2 cups white sugar 3.25
39/4*x3 Tspoon dry yeast 9.75
13/4*x4 Tspoon salt 3.25
13/8*x5 cups veggie oil 1.625
65/2*x6 cups flour 32.5
i need help asap please help
Put the following equation of a line into slope-intercept form, simplifying all fractions. 3x−6y= −30
Answer: y = 1/2x + 5
Step-by-step explanation:
3x-6y= -30
Step 1: Subtract 3x to cancel it out and put it on the other side.
3x-6y= -30 -3x
- 3x
After doing that, the equation should look like this: -6y = -3x - 30
Step 2: Divide by -6 to get y alone
-6y/-6= (-3x - 30)/-6
Step 3: Solve
After dividing everything by -6, we get our answer!!
y = 1/2x + 5
*Slope-Intercept form will always end up being in the same format as y=mx+b
I hope this helps :))
Write an algebraic expression for “Julie runs three miles less than twice the number of miles, n, that Hannah runs.”
A. 2n – 3
B. 3n – 2
C. 2n + 3
D. 3n + 2
The algebraic expression is 2n - 3 if Julie runs three miles less than twice the number n that Hannah runs. So option (a) is correct
An algebraic expression is a mathematical expression made up of variables, constants, and algebraic operations.
It is assumed:
"Julie runs three miles less than twice as far as Hannah runs," the expression goes.
It states three miles less than a number, so you get a -3 and twice the number n, which is the same as 2n, and then you rearrange it to get 2n-3
The expression is 2n - 3
Thus, the algebraic expression is 2n - 3, if Julie runs three miles less than twice the number n that Hannah runs.
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Janelle wrote 23.4 for
the product of 7.8 x 0.3. Use number
sense to decide if Janelle placed the
decimal point in the correct place in
the product. If it is incorrect, give the
correct product.
She put decimals incorrectly. The correct product of the decimal numbers is 7.8 and 0.3 will be 2.34.
What is Algebra?Algebra is the study of algebraic expressions, while logic is the manipulation of those concepts.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to answer the problem correctly and precisely.
Janelle composed 23.4 for the result of 7.8 x 0.3. Utilize number sense to choose if Janelle put the decimal point perfectly located in the item.
Then the multiplication of the numbers 7.8 and 0.3 will be given by putting a cross sign between them. Then we have
⇒ 7.8 x 0.3
⇒ 2.34
She put decimals incorrectly. The correct product of the decimal numbers is 7.8 and 0.3 will be 2.34.
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help..............solve for x give answer as an improper fraction
The appropriate fraction produced by the expression is -32/9.
Solving rational fractionsAny function that can be expressed as a rational fraction, which is an algebraic fraction in which both the numerator and the denominator are polynomials, is referred to as a rational function.
Given the function below:
6x-5/3 = 5x + 9
Cross multiply
6x - 5 = 3(5x + 9)
Expand to have:
6x - 5 = 3(5x) + 3(9)
6x - 5 = 15x + 27
6x - 15x = 27 + 5
-9x = 32
Divide both sides by -9
-9x/-9 = 32/-9
x = -32/9
Hence the result of the expression as an improper fraction is -32/9.
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