Answer:
1. 11 1/3
2. 4/11
3. 3/26
4. -18/5
Step-by-step explanation:
100 Points! Algebra question, photo attached. Please show as much work as possible. Thank you!
A. The distributions of the periods is that using the five number summary is that
The 7th Period has higher minimum and lower maximumThe 3rd period is more spread (from the quartiles)The 7th Period has higher medianB. The box and whisker plot of the periods is attached
A. Comparing the distributions of the periodsFrom the question, we have the following parameters that can be used in our computation:
7th Period
66, 72, 77, 78, 78, 80, 82, 84, 84, 87, 88, 88, 89, 89, 90 92, 92, 93, 94, 94 96, 96
3rd Period
52, 60, 62, 64, 64, 65, 68, 71, 72, 74, 75, 76, 78, 79, 83, 84, 85, 88, 89, 93, 94, 97
The distributions of the periods will be compared using the five-number summaries
Using a graphing tool, the five-number summaries are:
7th Period
Minimum: 66Lower Quartile Q1: 79.5Median: 88Upper Quartile Q3: 92.25Maximum: 963rd Period
Minimum: 52Lower Quartile Q1: 64.75Median: 75.5Upper Quartile Q3: 85.75Maximum: 97B. Creating a box and whisker plot of the periodsThe box and whisker plot of the periods is added as an attachment
From the box and whisker plot attached, we can see the five-number summaries of the periods
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Right triangle EFG has its right angle at F, EG = 6 , and FG = 4 What is the value of the trigonometric ratio of an angle of the triangle? Drag a value to each box to match the trigonometric ratio with its value .
Answer:
\(\cos G=\dfrac{2}{3}\)
\(\csc E=\dfrac{3}{2}\)
\(\cot G=\dfrac{2}{\sqrt{5}}\)
Step-by-step explanation:
If the right angle of right triangle EFG is ∠F, then EG is the hypotenuse, and EF and FG are the legs of the triangle. (Refer to attached diagram).
Given ΔEFG is a right triangle, and EG = 6 and FG = 4, we can use Pythagoras Theorem to calculate the length of EF.
\(\begin{aligned}EF^2+FG^2&=EG^2\\EF^2+4^2&=6^2\\EF^2+16&=36\\EF^2&=20\\\sqrt{EF^2}&=\sqrt{20}\\EF&=2\sqrt{5}\end{aligned}\)
Therefore:
EF = 2√5FG = 4EG = 6\(\hrulefill\)
To find cos G, use the cosine trigonometric ratio:
\(\boxed{\begin{minipage}{9 cm}\underline{Cosine trigonometric ratio} \\\\$\sf \cos(\theta)=\dfrac{A}{H}$\\\\where:\\ \phantom{ww}$\bullet$ $\theta$ is the angle. \\ \phantom{ww}$\bullet$ $\sf A$ is the side adjacent the angle. \\\phantom{ww}$\bullet$ $\sf H$ is the hypotenuse (the side opposite the right angle). \\\end{minipage}}\)
For angle G, the adjacent side is FG and the hypotenuse is EG.
Therefore:
\(\cos G=\dfrac{FG}{EG}=\dfrac{4}{6}=\dfrac{2}{3}\)
\(\hrulefill\)
To find csc E, use the cosecant trigonometric ratio:
\(\boxed{\begin{minipage}{9 cm}\underline{Cosecant trigonometric ratio} \\\\$\sf \csc(\theta)=\dfrac{H}{O}$\\\\where:\\ \phantom{ww}$\bullet$ $\theta$ is the angle. \\ \phantom{ww}$\bullet$ $\sf A$ is the side adjacent the angle. \\\phantom{ww}$\bullet$ $\sf H$ is the hypotenuse (the side opposite the right angle). \\\end{minipage}}\)
For angle E, the hypotenuse is EG and the opposite side is FG.
Therefore:
\(\csc E=\dfrac{EG}{FG}=\dfrac{6}{4}=\dfrac{3}{2}\)
\(\hrulefill\)
To find cot G, use the cotangent trigonometric ratio:
\(\boxed{\begin{minipage}{9 cm}\underline{Cotangent trigonometric ratio} \\\\$\sf \cot(\theta)=\dfrac{A}{O}$\\\\where:\\ \phantom{ww}$\bullet$ $\theta$ is the angle. \\ \phantom{ww}$\bullet$ $\sf A$ is the side adjacent the angle. \\\phantom{ww}$\bullet$ $\sf H$ is the hypotenuse (the side opposite the right angle). \\\end{minipage}}\)
For angle G, the adjacent side is FG and the opposite side is EF.
Therefore:
\(\cot G=\dfrac{FG}{EF}=\dfrac{4}{2\sqrt{5}}=\dfrac{2}{\sqrt{5}}\)
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow.Hours of Sleep Age Group39 or younger 40 or older Fewer than 6 38 366 to 6.9 60 577 to 7.9 79 778 or more 63 90(a) Conduct a test of independence to determine whether hours of sleep are independent of age.State the null and alternative hypotheses.H0: Hours of sleep per night is not independent of age.Ha: Hours of sleep per night is independent of age.H0: The proportion of people who get 8 or more hours of sleep per night is not equal across the two age groups.Ha: The proportion of people who get 8 or more hours of sleep per night is equal across the two age groups. H0: Hours of sleep per night is independent of age.Ha: Hours of sleep per night is not independent of age.H0: Hours of sleep per night is mutually exclusive from age.Ha: Hours of sleep per night is not mutually exclusive from age.Find the value of the test statistic. (Round your answer to three decimal places.)What is the p-value? (Round your answer to four decimal places.)p-value =Using a 0.05 level of significance, what is your conclusion?Reject H0. We conclude that hours of sleep per night and age are not independent.Do not reject H0. We cannot conclude that hours of sleep per night and age are not independent. Do not reject H0. We conclude that hours of sleep per night and age are independent.Reject H0. We cannot conclude that hours of sleep per night and age are independent.(b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?Fewer than 6 % 6 to 6.9 % 7 to 7.9 % 8 or more %
Sleep hours per night is independent.
Given the data:
Hours of Sleep 39 or younger 40 or older
> 6 _____38 36
6 to 6.9 _ 61 58
7 to 7.9 __76 74
8 or more 65 92
The analysis will be conducted using the Chisquare statistic:
The supposition
H0: The amount of sleep each night is independent
H1: The amount of sleep each night is not independent
χ² = (observed - Expected) (observed - Expected)2 / Predicted
to speed up computation. To conduct the analysis, we might utilize a Chisquare calculator:
The evaluation statistic is 4.0061.
Row - 1 * The degree of freedom (column - 1)
Degree of freedom is equal to (4-1)*(2-1)=3*1=3.
Pvalue is 0.261.
Since Pvalue >, we are unable to reject the hypothesis that sleep duration is independent total %
> 6 _____38 36_ 74 _ 14.8
6 to 6.9 61 58 _ 119 23.8
7 to 7.9 __76 74 150 30
8 or higher 65 92 157 31.4
_______240 260 500 100
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I am lost please help thank you all
Answer:
Step-by-step explanation:
At least 9 means more than 9 and includes 9
x ≥ 9 and [9, +∞)
At most 9 means numbers less than 9
x≤9 and (-∞, 9]
more than 9 means bigger than 9 but not including 9
x > 9 and (9, +∞)
fewer than 9 means less than 9 but not including 9
x<9 and (-∞, 9)
strictly between 7 and 9 means between 7 and 9 but not including
7<x<9 and (7,9) (This is the only one I'm unsure of. Strictly, not sure if it includes or doesn't include, usually it just says include or doesn't include)
between 7 and 7 inclusive. means it's just =7 There's no boundaries
x=7
no more than 7 means less than 7 and includes 7
x ≤ 7 and (-∞, 7]
The number of exercises on Khan academy has increased rapidly since it began in 2006The relationship between the elapsed time, ttt, in years, since Khan academy began, and the total number of its exercises, E_{\text{year}}(t)E
year
(t)E, start subscript, start text, y, e, a, r, end text, end subscript, left parenthesis, t, right parenthesis, is modeled by the following function:
Eyear(t)=100⋅(1.7)t
Complete the following sentence about the monthly rate of change in the number of exercises.
Round your answer to two decimal places.
Every month, the number of exercises increases by a factor of
Answer:
1.05
Step-by-step explanation:
We start of with 100 * (1.7)^t
So the change in 100 is (1.7)^t(years). Well, that is in years, we need months. There are 12 months in a year, this is good to remember for several reasons ;). Since they ask for "Every month, the number of exercises increases by a factor of:", we must plug in 1/12 as t.
We can rewrite this as:
100 * (1.7)^1/12
Just plug the (1.7)^1/12 into a calculator, which is a cool device that can do boring math for you, and you should get 1.045... blah blah blah(a bunch of other useless numbers).
So now we have:
100*1.045
Well, the problem said "Round your answer to two decimal places."
So we need to round the 1.045.
5 is right in the middle, but if you know rounding, your probably know that the 5 goes up. So yay, your 1.045 is now 1.05.
So in the end, we get:
1.05
Ti⊂k∫∈s ω∅∅p :)
The number of exercises increases by a factor of approximately 14.17 each month.
To determine the monthly rate of change in the number of exercises, we need to find the factor by which the number of exercises increases each month.
The given function, Eyear(t) = 100 × \((1.7)^t\), represents the total number of exercises after t years. To convert this to a monthly rate, we need to divide the yearly rate by 12 (since there are 12 months in a year).
So, the monthly rate of change in the number of exercises is:
E_month(t) = Eyear(t)/12
Substituting the given function, we have:
Emonth(t) = 100 × \((1.7)^t\)/12
To find the factor by which the number of exercises increases each month, we can compare the value of E_month(t) at t = 1 to the value at t = 0:
E_month(1) = 100 × \((1.7)^t\)/12 = (100 × 1.7)/12 = 14.17
Therefore, the number of exercises increases by a factor of approximately 14.17 each month.
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Using the slop formula, find the slope of the line through the given points.(-3, 1) and (6, 1)What is the slope of the line. Note: It didn't provide a graph or anything.
Given a pair of points on a straight line
To Determine: The slope of the line
Solution:
The slope formula given two points is
\(s=\frac{y_2-y_1}{x_2-x_1}\)The given points are
\(\begin{gathered} (-3,1),\mleft(6,1\mright) \\ x_1=-3,y_1=1 \\ x_2=6,y_2=1 \end{gathered}\)Substitute the given points into the formula to find the slope
\(\begin{gathered} s=\frac{1-1}{6--3} \\ s=\frac{0}{6+3} \\ s=\frac{0}{9} \\ s=0 \end{gathered}\)The slope of the line is 0
Please note that a zero slope is just the slope of a horizontal line. The y-coordinate never changes no matter what the x-coordinate is.
Hence, the slope of the line is 0
help me understand, use the graph to answer number 3
The one way journey is 45 miles
Here, we want to get the number of miles for the one way trip
To calculate this, we have to look at the triangle formed on the left
By calculating this distance, we have the value of the number of miles traveled on a leg
We need the base and height of the triangle
The base is the x-axis change from the orgin while the height is the y-axis change from the origin
Looking at the graph, we can see that this value moves from 45 miles to 0 miles
So, the distance traveled is 45 miles on a leg of the journey
Lara grows apples in her orchard and sells them at the weekly farmer's market. Each week, she sells the apples for a different price and records the number of apples sold. The scatter plict below
shows the price of one apple and the number of apples that were sold. A line of best fit for these data points, the equation y=-z+32, is also shown on the plot
Apples Number of Apples Sold
The string of a kite is 100 meters long and it makes an angle of 60° with the ground. What is the height of the kite?
Show your work please)
Answer:
50√3 ≈ 86.6 m
Step-by-step explanation:
The geometry can be modeled by a right triangle with the height of the kite being the leg opposite the 60° angle. The hypotenuse has the given length of 100 m.
The mnemonic SOH CAH TOA reminds you that the relation between angles and the sides of interest here is ...
Sin = Opposite/Hypotenuse
sin(60°) = (kite height)/(100 m)
kite height = (100 m)·sin(60°) = (100 m)(√3)/2
kite height = 50√3 m ≈ 86.6 m
Use the Pythagorean Theorem to find the length of the hypotenuse in the triangle shown below. The figure shows a right triangle with legs marked 70 and 24.
Answer:
74
Step-by-step explanation:
At a local college, only 30% of students live off campus. Of those who live off campus, 62% of those students get a part-time job. Of those who live on campus, 65% work part-time. The tree diagram shows how the college students are divided into subgroups.
The tree diagram shows college students branching off into two categories, off campus and on campus students. Off campus students branches off into two sub-categories, work part-time and do not work. On campus branches off into two subcategories, work part-time and do not work.
What is the percentage of students who live on campus who do not have a part-time job?
18.6%
24.5%
35%
38%
Answer:
24.5%
Step-by-step explanation:
Given
P(Off-Campus) = 0.30
P(Part-Time Job | Off-Campus) = 0.62
P(Part-Time Job | On-Campus) = 0.65
Inferred
P(On-Campus) = 0.70
P(No Part-Time Job | Off-Campus) = 0.38
P(No Part-Time Job | On-Campus) = 0.35
Calculation
P(No Part-Time Job | On-Campus) = P(No Part-Time Job ∩ On-Campus)/P(On-Campus)
0.35 = P(No Part-Time Job ∩ On-Campus)/0.70
0.245 = P(No Part-Time Job ∩ On-Campus)
Therefore, 24.5% of students that live on campus do not have a part-time job.
Which ordered pair represents 3 points to the left and 2 points above T
Answer:
Answer:
(0, 6)
Step-by-step explanation:
Point T has a coordinate pair of (3, 4). That is, at point T, x = 3, while y = 4.
3 points to the left of T would be a movement on the x-axis. This movement is a run across the x-axis. At T, x = 3. Therefore, 3 points to the left would be a decrease by 3 = 3 - 3 = 0.
3 points to the left of T would leave us with an x coordinate of 0.
2 points above T suggest a rise, which is on the y-axis.
Therefore, at T, y = 4. 2 points above 4 = 4 + 2 = 6. y coordinate would now be 6.
In conclusion, the ordered pair representing 3 points to the left, and 2 points above point T is (0, 6).
Answer:
(0, 6)
Step-by-step explanation:
Follow the steps below to find the value of x that makes A||B. offende 8x + 30 B 10x A Set the alternate exterior angles equal to each other. [ ? ]x = X + Enter
The value of x that makes A parallel to B is 15.
Describe Alternate Exterior Angles?Alternate exterior angles are a pair of angles that lie outside of two parallel lines and are on opposite sides of the transversal. In other words, they are a pair of non-adjacent angles that are formed when a transversal intersects two parallel lines. The angles are congruent, meaning that they have the same measure.
The term "alternate" refers to the fact that they are on opposite sides of the transversal and "exterior" indicates that they are outside of the parallel lines. Alternate exterior angles are important in geometry because they can be used to prove that two lines are parallel. If the alternate exterior angles are congruent, then the lines are parallel.
Since the alternate exterior angles are equal, we can set them equal to each other:
8x + 30 = 10x
Subtracting 8x from both sides, we get:
30 = 2x
Dividing both sides by 2, we get:
15 = x
So the value of x that makes A||B is 15.
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The distance around a circle is called the ______.
A. volume
B. area
C. circumference
D. diameter
The answer is:
C. circumference
Work/explanation:
Here's the correct answer:
The distance around a circle is called the circumference.
How to find the circumference :
Use \(\sf{C=2\pi r}\) or \(\sf{C=\pi d}\)Hence, c is correct.1. The method of substitution is likely the best method for which system?
−8x−2y=18x−2y=5
2x+y=103x+2y=5
5x−2y=32x+2y=1
−3x+2y=93x−5y=4
2. Solve the system of equations using the substitution method.
5x−4y=−15x−3y=−3
(3, 0)
(0, -4)
(-3, 0)
(0, -3)
Answer:
2.) x=−3 and y=0
Step-by-step explanation:
im still tryna figure out answer to number 1. sorry
1. 2a+b-c
A. O
B. 1
C. 3
D. 4
Answer:
i think C correct me if im wrong pls
Step-by-step explanation:
Which is the equation of a circle with center (-2, 3) and radius r = 5?
Answer:
(x+2) ^2 + (y-3)^2 = 25
Step-by-step explanation:
The equation of a circle is given by
(x-h) ^2 + (y-k)^2 = r^2 where (h,k) is the center and r is the radius
(x--2) ^2 + (y-3)^2 = 5^2
(x+2) ^2 + (y-3)^2 = 25
what is 6+6×8-5÷3+12
we have
6+6×8-5÷3+12
so
Applying PEMDAS
P ----> Parentheses first
E -----> Exponents (Powers and Square Roots, etc.)
MD ----> Multiplication and Division (left-to-right)
AS ----> Addition and Subtraction (left-to-right)
step 1
Multiplication
6x8=48
substitute
6+48-5÷3+12
step 2
Division
5÷3=5/3
substitute
6+48-(5/3)+12
step 3
Addition
6+48=54
54-5/3+12
step 4
S
Answer:
64.33 is the answer.
Which single power is equivalent to the expression (4³)²
----
4²
The single power that is equivalent (4³)² to is 4^6.
What is power?This is a term in mathematics to refer to the exponents. The given expression is four to the power of three all to the power of two. Exponents helps to represent equations and makes it easier to remember and handle.
Given data
(4³)²
How to solve (4³)²This could be solved using the laws of indices
(4³)² = 4³ * 4²
4³ * 4² = 4³ *² = 4^6
Hence we can say that the single power that is equivalent (4³)² to is 4^6.
base = 4
power = 6
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i need help on this one
Answer:
Is g(x)
Step-by-step explanation:
We search the roots of the function on this way
(x-1)^2 (x+2) =0
(x-1)^2 =0
x-1=\(\sqrt{0}\)
x=1 ////
(x+2)=0
x=-2 ////
So (1,0) and (-2,0) are the roots of the function (as the image)
15 (6) List all numbers for which the rational expression is undefined x+12/x(x-2)
0 and 2.
These numbers will make the rational expression undefined.
basically the denominator will be 0 which is undefined.
Can somebody solve this?
Answer:
8 months
Step-by-step explanation:
if you can get 120 per month then 950/120 = ~8
Answer:
She needs $350.
Step-by-step explanation:
120 x 5 = 600
$950 - $600 = $350
a. Justify your answer. *( 9) * 2.78 x 2.78 x (13) * (***(-6.2) X(-0.2873) - 4X XA
In order to find the sign of the product, we need to know that the product of two equal signs will be a positive sign, and two different signs will be a negative sign.
Also, we can consider just the sign of each number in order to find the final sign.
So we have that:
\(\begin{gathered} -4\cdot(-\frac{8}{9})\cdot2.78\cdot(1\frac{1}{3})\cdot(-\frac{2}{5})\cdot(-6.2)\cdot(-0.2873)\cdot(3\frac{1}{11})\cdot A \\ =(_{}-)(_{}-)(_{}+)(_{}+)(_{}-)(_{}-)(_{}-)(_{}+)\cdot A \\ =-A \end{gathered}\)The sign of the product is negative, if A is a positive number, and is positive, if A is a negative number.
2 Mabaso has R140, Thabo has R70 and Ally has R35. What is the ratio of the amount of money Mabaso has, to the amount of money Thabo has and to the amount of money Ally has? Write the ratios in simplest form. The price of a steel table is R750. On Black Friday the table could be bought for R600. Calculate the percentage discount? Show ALL your calculations. Convert 125 g to kilograms. (1 kg = 1 000 grams) A green grocer packs 12 apples in a plastic bag. Calculate the number of bags he w need if he has 285 apples. The scale of a map is 1 500 000. Determine the actual distance in km if measurement on the map is 23,7 cm. Hint: 1 km = 100 000 cm
The actual distance represented by 23.7 cm on the map is 355.5 km.
To find the ratio of the amount of money Mabaso has to the amount of money Thabo has and the amount of money Ally has, we can divide each amount by the smallest amount (which is R35) to simplify the ratio.
Mabaso has R140, Thabo has R70, and Ally has R35.
The ratio of Mabaso's money to Thabo's money is:
R140 ÷ R35 = 4
The ratio of Mabaso's money to Ally's money is:
R140 ÷ R35 = 4
Therefore, the ratio of the amount of money Mabaso has to the amount of money Thabo has and to the amount of money Ally has is 4:1:1.
To calculate the percentage discount of a steel table, we need to find the difference between the original price and the discounted price, and then divide it by the original price. Finally, we multiply the result by 100 to get the percentage.
Original price: R750
Discounted price: R600
Discount: R750 - R600 = R150
Percentage discount: (R150 ÷ R750) × 100 = 20%
So, the table has a 20% discount on Black Friday.
To convert 125 grams to kilograms, we divide the amount in grams by 1,000 (since there are 1,000 grams in a kilogram).
125 g ÷ 1,000 = 0.125 kg
Therefore, 125 grams is equal to 0.125 kilograms.
If a green grocer packs 12 apples in a plastic bag and has 285 apples, we divide the total number of apples by the number of apples per bag to determine the number of bags needed.
Number of bags needed: 285 apples ÷ 12 apples/bag = 23.75 bags
Since we can't have a fraction of a bag, we round up to the nearest whole number. Therefore, the green grocer would need 24 bags.
If the scale of a map is 1,500,000 and the measurement on the map is 23.7 cm, we can use the scale to determine the actual distance.
1 cm on the map represents 1,500,000 cm in reality.
23.7 cm on the map represents x cm in reality.
x = 23.7 cm × 1,500,000 cm = 35,550,000 cm
To convert cm to km, we divide by 100,000 (since there are 100,000 cm in a kilometer).
35,550,000 cm ÷ 100,000 = 355.5 km
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Please answer this math question !! thank you so so much !! will give brainliest !!
Answer:
x=3
Step-by-step explanation:
A vertical line is an up and down line
It is of the form
x =
The x coordinate is 3
x=3
Suppose that a company's sales were $1,000,000 6 years ago and are $9,000,000 at the end of the 6 years. Find the geometric mean growth rate of sales. (Round your answer to 4 decimal places.)
Answer:
The geometric mean growth rate of sales is 1.4422.
Step-by-step explanation:
We have two sales values, one from 6 years ago and the other from now.
We have to calculate the geometric growth rate of sales.
We have:
\(y(-6)=1,000,000\\\\y(0)=9,000,000\)
We can write the relation between these two values as:
\(y(0)=y(-6)k^{0-(-6)}\\\\9,000,000=1,000,000k^6\\\\k^6=9\\\\k=9^{1/6}= 1.4422\)
The geometric mean growth rate of sales is 1.4422.
Factors of (9y^-12)-(12-16)
Answer:
4y^12+9 over y^12
Step-by-step explanation:
hope it helps
Sam works at a shoe store. He earns $300 every week plus $15 for every pair of shoes that he sells. How many pairs of shoes would he need to sell to make $500 in a week?
Answer:
300 + 15x = 500
15x = 200
x = 200/15
x=13.333
14 pair of shoes
Step-by-step explanation:
What is the degree of 24x?
Answer:
one
Step-by-step explanation:
Please help easy in urgent Extra points and Mark brainlist
Answer:
-3/-2 is the correct answer
Step-by-step explanation:
i have done this stuff before so it is that because the two negatives becomes one