Independent Practice7. The original quantity is 10 and the new quantityis 13. What is the percent change? Is it anincrease or decrease?8. The original quantity is 5 and the new quantityis 3. What is the percent change? Is it an increaseor decrease?7%1310100%100%poP.P Р-P%.The percent increase is%The percent decrease is
Answers
The percentage increase or decrease can be calculated by :
[tex]\%change=\frac{New-Orig}{Orig}\times100[/tex]7. New = 13, Orig = 10
% change = [(13 - 10)/10] x 100 = 30% (Increase)
8. New = 3, Orig = 5
% change = [(3 - 5)/5] x 100 = -40% or 40% (decrease)
Related Questions
Which relation is a function?
Answers
Use the vertical line test.
Iman is playing a game. On one turn she earns 2 points and on the next turn she loses 5 points.
Graph her points on the number line.
Answers
Iman will be on - 3 on the number line after the game.
A number line is a representation of a graduated straight line that is used to represent real numbers visually. It is assumed that every point on a number line corresponds to a real number and that every real number corresponds to a point.
When laying a game, Iman earns 2 points on one turn and losses 5 points on the next turn.
Now, let's say Iman started from zero on the number line,
Then, on the first turn, she earns 2 points.
So, the number of points Iman has will be:
x = 0 + 2 = 2
After the next turn she losses 5 points.
x = 2 - 5 = - 3
Then Iman will be on - 3 on the number line.
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5 Jamila sells honey. She posts this sign for her customers.Then she makes a graph that shows the price of each size jar.Is Jamila's price the same per ounce for any size jar? Explain.HONE201612Price ($)4Х004 81216Jar Capacity (oz)
Answers
it is given that, the relation between the price of honey and jar capacity is in the given graph.
so, we have three points on the graph,
A(4,5), B(10,12.5) and C (15,19)
so, price of 4 oz = 5 $
price of 1 oz = 5/4 = 1.25 $
price of 10 oz = 12.5
price of 1 oz = 1.25 $
price of 15 oz is 19 $
price of 1 oz is 19/15 = 1.26 $
so, the approx price for 1 oz of honey is 1.25 that is approx same per ounce for any size of the jar.
thus, yes Jamila's price is the same per ounce for any size jar
A coffee distributor needs to mix a(n) Queen City coffee blend that normally sells for $11.90 per pound with a Arabian Mocha coffee blend that normally sells for $13.10 per pound to create 10 pounds of a coffee that can sell for $12.86 per pound. How many pounds of each kind of coffee should they mix? A) Write an equation using the information as it is given above that can be solved to answer the question. Use z as your variable to represent the quantity of Queen City coffee blend. Equation: 11.92 + 13.1. – 131 = 128.6 Х
Answers
The linear equations are x + y = 10 and (11.90)x + (13.10)y = (12.86)(10) and the value of x and y are 2 and 8 respectively.
What is a linear equation?It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.
It is given that:
A coffee distributor needs to mix a(n) Queen City coffee blend that normally sells for $11.90 per pound.
Let x and y be the quantity of Queen City coffee (lbs) and the quantity of Arabian Mocha coffee (lbs)
From the data given;
The equations can be framed:
x + y = 10
(11.90)x + (13.10)y = (12.86)(10)
After solving the substitution method:
x = 2
y = 8
Thus, the linear equations are x + y = 10 and (11.90)x + (13.10)y = (12.86)(10) and the value of x and y are 2 and 8 respectively.
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convert 3.2 yards to feet
Answers
1 yard is equivalent to 3 feet. Then to convert 3.2 yards to feet we can use the next proportion,
[tex]\frac{1\text{ yard}}{3.2\text{ yard}}=\frac{3\text{ ft}}{x\text{ ft}}[/tex]Solving for x,
[tex]\begin{gathered} 1\cdot x=3\cdot3.2 \\ x=9.6 \end{gathered}[/tex]3.2 yards is equivalent to 9.6 feet
fia needs 3/4 cup of sugar but only has a a 1/3 cup and a 1/8 cup which one should she use and why
Answers
Fia needs 3/4 cub of sugar
She has only a 1/3 cup and a 1/8 cup
To find which cup should she use :
Divide 3/4 by 1/3 and divide 3/4 by 1/8
The operation which give integer number is the true choice
So,
[tex]\begin{gathered} \frac{3}{4}\div\frac{1}{3}=\frac{3}{4}\cdot\frac{3}{1}=\frac{9}{4}=2\frac{1}{4} \\ \\ \frac{3}{4}\div\frac{1}{8}=\frac{3}{4}\cdot\frac{8}{1}=\frac{24}{4}=6 \end{gathered}[/tex]So, it should be use a 1/8 cup, so 6 times of a 1/8 cup will give 3/4 cup of sugar.
So, the answer is : a 1/8 cup
Find the equation of the line with Slope = −3-3 and passing through (2,−13)(2,-13) . Write your equation in the form y=mx+by=mx+b .
Answers
Given that the slope of the line is:
[tex]m=-3[/tex]And knowing that the line passes through this point:
[tex]\mleft(2,-13\mright)[/tex]You need to remember that the Slope-Intercept Form of the equation of a line is:
[tex]y=mx+b[/tex]Where "m" is the slope of the line and "b" is the y-intercept.
In order to find the value of "b", you can substitute the slope and the coordinates of the point on the line, into the equation:
[tex]-13=(-3)(2)+b[/tex]Now you can solve for "b":
[tex]\begin{gathered} -13=-6+b \\ -13+6=b \\ b=-7 \end{gathered}[/tex]Knowing "m" and "b", you can write the following equation of the line in Slope-Intercept Form:
[tex]y=-3x-7[/tex]Hence, the answer is:
[tex]y=-3x-7[/tex]Factor completely 12m^2-3
Answers
Answer:
3 ( 2m-1)(2m+1)
Step-by-step explanation:
12m^2-3
Factor out the 3
3( 4m^2 -1)
3 ( ( 2m)^2 - 1^2)
Using the difference of squares ( a^2 - b^2) = ( a-b) (a+b)
3 ( 2m-1)(2m+1)
12m^2 - 3 = 3(4m^2 - 1)
but the bracket contains the difference between two squares
= 3(2m - 1)(2m + 1)
Lesson 4: Proportional Relationships a 2. A recip Equations the qu a. Let's write equations describing proportional relationships. b. 4.1: Number Talk: Division Find each quotient mentally. C. 645 - 100 645:50 48.6 - 30 48.6 + x
Answers
Move the decimal point of 645 two units left ( You are dividing by 100)
---------------------------
[tex]\frac{645}{50}=\frac{129}{10}=12.9[/tex]Simplify 645/50 as 129/10, now move the decimal point of 129 one unit left (You are dividing by 10).
-----------------------
[tex]\frac{48.6}{30}=\frac{243}{\frac{5}{30}}=\frac{243}{150}=\frac{81}{50}[/tex]Express 48.6 as 243/5, then use division of fractions to get 243/150, then simplify 243/150 as 81/50
-----------------------
[tex]\frac{48.6}{x}=\frac{\frac{243}{5}}{x}=\frac{243}{5x}[/tex]Express 48.6 as 243/5, then use division of fractions to get 243/5x
A cyclist rides his bike at a speed of 24miles per hour what is this speed in miles per minute how many miles will the cyclist travel in 5minutes ?
Answers
If the speed of the cyclist is 24 miles/hour
In miles per minutes, 60 minutes = 1 hour
To convert into miles per minutes,
[tex]\text{Speed in miles per mins=}\frac{24}{60}=0.4\text{ miles/min}[/tex]Speed in miles/min is 0.4 miles/min
If the cyclist travels for 5 minutes, distance travelled in miles will be,
[tex]\begin{gathered} dis\tan ce=\text{speed}\times\text{time} \\ \text{Where sp}eed=0.4\text{ miles/min} \\ \text{time}=5\min \\ \text{distance}=0.4\text{ miles/min}\times5\min =2\text{ miles} \end{gathered}[/tex]Distance travelled in miles is 2 miles
Martin orders a pasta dish that is priced at $11.99. He also orders a drink. The total cost for the pasta and drink is $14.48. What is the cost of the drink?
Answers
Explanation
Let the cost of the drink be x.
Therefore;
[tex]\begin{gathered} cost\text{ of dish+cost of drinks =total cost} \\ 11.99+x=14.48 \\ x=14.48-11.99 \\ x=2.49 \end{gathered}[/tex]Answer: 2.49 dollars
Please help would really appreciate!!!!
Answers
A) f(-1) + f(3) = 0
B) f(-1) - f(3) = 0
How the functions are calculated?
[tex]f(x)=2x^{2} -4x-6[/tex]
f(-1) = 2(1) -4(-1) -6
=2+4-6
=6- 6
=0
f(3) = 2(9)- 4(3) - 6
=18- 12- 6
=18 - 18
= 0
A) f(-1) + f(3) = 0 + 0 = 0
B) f(-1) - f(3) = 0 - 0 = 0
What are functions?
A relationship between a group of inputs and one output each is referred to as a function. It is an association between inputs in which each input is connected to precisely one output. A domain, codomain, or range exists for every function.y = f (x) is how functions are typically represented .To learn more about functions, refer:
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Could you help me with these problems ? I don't really know how to put the equation together and the steps I should take to solve it, it would be amazing if you could show me how, and I'd be very thankful if you could also add a picture showing the steps if possible. Thank you so much.
Answers
Since it is a right triangle, you can use the trigonometric ratio sin(θ) to solve the exercise:
[tex]\sin (\theta)=\frac{\text{opposite side}}{\text{hypotenuse}}[/tex]Graphically,
So, in this case, you have
[tex]\begin{gathered} \theta=54\text{\degree} \\ \text{ Opposite side }=72 \\ \text{ Hypotenuse }=x \\ \sin (54\text{\degree})=\frac{72}{x} \\ \text{ Multiply by x from both sides of the equation} \\ \sin (54\text{\degree})\cdot x=\frac{72}{x}\cdot x \\ \sin (54\text{\degree})\cdot x=72 \\ \text{ Divide by }\sin (54\text{\degree})\text{ from both sides of the equation} \\ \frac{\sin(54\text{\degree})\cdot x}{\sin(54\text{\degree})}=\frac{72}{\sin(54\text{\degree})} \\ x=\frac{72}{\sin(54\text{\degree})} \\ x=\frac{72}{0.8090} \\ x=88.99 \\ \text{ Rounding to the nearest tenth} \\ x=89.0 \end{gathered}[/tex]Therefore, the measure of the missing side is 89.
what is8.546 rounded to nearest tenth
Answers
If we round to the nearest tenth, it would be 8.5 because the hundredth digit is less than 5.
Hence, the answer is 8.5.HELP!!!
In triangle DEF, m∠D = (3x + 27)°, m∠E = (4x + 22)°, and m∠F = 68°. Determine the degree measure of the exterior angle to ∠D.
54°
58°
122°
126°
Answers
The sum of all interior angles of a triangle is 180° thus the measure of the exterior angle to ∠D is 126° so option (D) is correct.
What is a triangle?
A triangle is a 3-sided shape that is occasionally referred to as a triangle. There are 3 sides and three angles in every triangle, some of which may be the same.
It is known that the sum of all three angles inside a triangle will be 180°.
So, m∠D + m∠E + m∠F = 180°
(3x + 27) + (4x + 22) + 68 = 180
7x + 49 + 68 = 180
7x = 63
x = 9
So, m∠D = (3(9) + 27)° = 54°.
The exterior angle of D = 180- 54 = 126°.
Hence "The sum of all interior angles of a triangle is 180° thus the measure of the exterior angle to ∠D is 126°".
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Find the perimeter.A rectangle measuring 4 1/3 mm by 4 1/2 mm
Answers
Answer:
[tex]17\text{ }\frac{2}{3}\text{ mm}[/tex]Explanation:
Here, we want to find the perimeter of the rectangle
Mathematically, the formula for the perimeter of a rectangle is:
[tex]P\text{ = 2\lparen L + B\rparen}[/tex]Substituting the values, we have it that:
[tex]\begin{gathered} P\text{ = 2\lparen4}\frac{1}{3}\text{ + 4}\frac{1}{2}) \\ \\ P\text{ = 2\lparen}\frac{13}{3}+\text{ }\frac{9}{2}) \\ \\ P\text{ = 2\lparen}\frac{26\text{ + 27}}{6}) \\ \\ P\text{ = }\frac{53}{3}\text{ = 17 }\frac{2}{3}\text{ mm} \end{gathered}[/tex]At a school concert the total value of tickets sold was $3990. Student tickets sold for $8 and adult tickets sold for $11. The number of adult tickets sold was 6 less than 4 times the number of student tickets. Find the number of student tickets sold.
Answers
The number of student tickets sold is 78.
Given,
The number of student tickets sold = x
The number of adult tickets sold = 4x - 6
Total value of tickets sold = $3990
Value of one student ticket = $8
Value of one adult ticket = $11
Now, we have to find the number of student tickets sold:
Here,
The expression :8x + 11(4x - 6) = 3990
Solve the expression:
8x + 44x - 66 = 3990
52x - 66 = 3990
Add 66 to both sides
52x - 66 + 66 = 3990 + 66
We get,
52x = 4056
Divide 52 on both sides
52x / 52 = 4056/52
That is,
x = 78
Therefore,
The number of student tickets sold is 78.
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Which expression can be used to find the difference of the polynomials?
Answers
[10m + (-7m)] is the formula that can be used to find the difference between the polynomials (10m - 6) and (7m - 4). + [(-6) + 4].
[10m + (-7m)] + [(-6) + 4]
With more calculation
= 10m - 7m - 6 + 4
so we do
= 3m - 2 …. (2)
As (1) and (2) are equivalent
The polynomial's differences can be calculated using the equation [10m + (-7m)] + [(-6) + 4].
In order to find the difference between the polynomials, one can utilize the formula [10m + (-7m)] + [(-6) + 4].
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If $360 is invested at an interest rate of 4% per year and is compounded quarterly, how much will the investment be worth in 18 years?Use the compound interest formula A = P(1 + r over n)nt.
Answers
Answer:
The formula for compound interest is given below as
[tex]\begin{gathered} A=P\left(1+\frac{r}{n}\right?^{nt} \\ P=money\text{ invested=\$360} \\ r=rate=4\% \\ n=number\text{ of times compounded=4} \\ t=time=18years \end{gathered}[/tex]By substituting the values, we will have
[tex]\begin{gathered} A=P\left(1+\frac{r}{n}\right?^{nt} \\ A=360\left(1+\frac{4}{400}\right?^{4\times18} \\ A=360\left(1.01\right)^{72} \\ A=360\times2.0471 \\ A=736.96 \end{gathered}[/tex]Hence,
The total amount accrued, principal plus interest, with compound interest on a principal of $360.00 at a rate of 4% per year compounded 4 times per year over 18 years is $736.96.
VAn item costs $310 before tax, and the sales tax is $6.20.Find the sales tax rate. Write your answer as a percentage.0%X5?
Answers
Given:
The cost of the item is
[tex]\text{ \$}310.[/tex]The sales tax is
[tex]\text{ \$}6.20[/tex]Required:
We have to find the Sale tax rate and write the answer in percentage.
Explanation:
The formula for the sales tax rate is
[tex](\frac{\text{ sales tax}}{\text{ cost}}\times100)\%.[/tex]Therefore, The required sales tax rate is
[tex](\frac{6.20}{310}\times100)\%=(\frac{620}{310})\%=2\%.[/tex]Final answer:
Hence the final answer is
[tex]2\%.[/tex]1 A Great Way to Make Money POW ID: 965 High School, Discrete Math, Discrete Math Print Problem As your sixteenth birthday approaches you are looking for ways to make money so you can buy a used car. Currently, you earn $10 a week for doing chores around the house. Your father realizes that you are trying to save up, and offers you the following deal. You can either be paid the $10, or you can pull two bills from a brown paper bag. In the bag there are two $1 bills, two $5 bills, and a $10 bill. For example, you might pull out a $1 bill followed by a $5 bill, and earn only $6. Or you might pull out the $10 bill followed by a $5 bill and earn $15. If you were given this option every week, what would be better for you to do in the long run? Is pulling two bills from the paper bag a great way to make money?
Answers
The problem is about probability, so we need to know actually what is the probability of win more than $10 with the bag option, and see what is better in the long run. So we first are going to find
[tex]P(x>10)[/tex]Where x is "the resultin money of pulling two bills from the paper bag", now
[tex]undefined[/tex]The graph of a function f is shown below.Find f(3). f(3)=
Answers
when x is 3, y is 1
look 3 units to the right, and then see where the line crosses
Steve Conway wants his team to win more than 57 games this year. His team has already won 2 games this season and there are 5 more months to play. Based on his goal, how many games must his team win per month?
Answers
Using a linear function, it is found that:
The inequality is: 5m + 2 > 57.The solution is: m > 11.They team needs to win more than 11 games per month.Linear functionThe linear function that models this situation is defined as follows:
y = mx + b.
In which the parameters are as follows:
m is the slope, which is the number of games that he wants to win per month.b = 2 is the intercept, which is the number of games that he has already won.They want to win more than 57 games, and there are 5 months to play, hence the inequality is given as follows:
5m + 2 > 57.
It is solved similarly to an equality, isolating the variable m and finding the range of values, as follows:
5m > 55
m > 55/5
m > 11.
Hence the team needs to win more than 11 games a month, and the solutions is illustrated by the image given at the end of the answer.
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I need help with this question part a and b
Answers
Answer:
• (a)f[g(x)]=(3x-84)/4
,• (b)7.5
Explanation:
A function that converts shoe sizes in France to those in England is:
[tex]g(x)=\frac{3x-94}{4}[/tex]A function that converts shoe sizes in England to those in the United States is:
[tex]f(x)=x+\frac{5}{2}[/tex]Part A
To find a function that converts shoe sizes in France to those in the United States, we evaluate the composition, g(f(x)).
[tex]\begin{gathered} f(x)=x+\frac{5}{2} \\ f[g(x)]=g(x)+\frac{5}{2}=\frac{3x-94}{4}+\frac{5}{2}\frac{=3x-94+10}{4} \\ \implies f[g(x)]=\frac{3x-84}{4} \end{gathered}[/tex]A function that converts shoe sizes in France to those in the U.S is:
[tex]f[g(x)]=\frac{3x-84}{4}[/tex]Part B
Given a size 38 shoe in France:
[tex]f[g(38)]=\frac{3(38)-84}{4}=\frac{114-84}{4}=\frac{30}{4}=7.5[/tex]A size 38 shoe in France is of size 7.5 in the United States.
Lionfish are considered an invasive species, with an annual growth rate of 67%. A scientist estimates there are 8,000 lionfish in a certain bay after the first year.Write the explicit equation for f(n) that represents the number of lionfish in the bay after n years.
Answers
Answer:
f(n) = 8000(1.67)ⁿ⁻¹
Explanation:
The equation for exponential growth has the following form:
[tex]f(x)=a(1+r)^x[/tex]Where a is the initial amount, r is the growth rate and x is the variable.
In this case, we know the amount after the first year and the growth rate and the variable is the number of years. So, replacing a by 8,000 and r by 0.67 and x by (n-1) because we will not include the 1st year, we get:
[tex]f(n)=8000(1+0.67)^{n-1}[/tex]Therefore, the explicit equation for f(n) is:
[tex]f(n)=8000(1.67)^{n-1}[/tex]Hey, I’m really having trouble with this question and could use some help.
Answers
From the given graph, we have 2 points with coordinates:
[tex]\begin{gathered} (x_1,y_1)=(1,2) \\ \text{and} \\ (x_2,y_2)=(4,1) \end{gathered}[/tex]The equation of a line in slope-intercept form is given by
[tex]y=mx+b[/tex]With the given points, we can find the slope m as follows:
[tex]\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1} \\ \text{then} \\ m=\frac{1-2}{4-1} \end{gathered}[/tex]which gives
[tex]m=\frac{-1}{3}=-\frac{1}{3}[/tex]Then, our line equation has the form
[tex]y=-\frac{1}{3}x+b[/tex]Now, we can find the y-intercept b by substituting one of the two given points. For instance, if we substitute point (1,2) into the last result, we get
[tex]2=-\frac{1}{3}(1)+b[/tex]which gives
[tex]\begin{gathered} 2=-\frac{1}{3}+b \\ \text{then} \\ 2+\frac{1}{3}=b \\ \frac{7}{3}=b \end{gathered}[/tex]then, the line equations is
[tex]y=-\frac{1}{3}x+\frac{7}{3}[/tex]a) The linear function is
[tex]f(x)=-\frac{1}{3}x+\frac{7}{3}[/tex]b) What is f(6)?
In this case, we have that x=6. Then, by replacing this value into our function, we get
[tex]f(6)=-\frac{1}{3}(6)+\frac{7}{3}[/tex]which gives
[tex]\begin{gathered} f(6)=-\frac{6}{3}+\frac{7}{3} \\ f(6)=\frac{-6+7}{3} \\ f(6)=\frac{1}{3} \end{gathered}[/tex]therefore, the answer for part b is
[tex]\frac{1}{3}[/tex]A company is conducting a survey to determine how prepared people are for a long-term power outage, natural disaster, or terrorist attack. The frequency distribution on the right shows the resultsUse the table to answer the following question. What is the probability that the next person surveyed is very prepared?
Answers
The probability the next person surveyed is very prepared is 0.119.
What actually does probability mean?
The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number ranging from zero and 1, where, roughly, 0 denotes the event's impossibility and 1 represents certainty.Formula of total frequency is,
Total = f₁ + f₂ + f₃ + f₄ +...............n∑fi
The total frequency is,
total = n∑i=2 fi ⇒ 262 + 992 + 587 + 313 + 52
The total number of people prepared for a long-term power outage, natural disaster, or terrorist attack is obtained by taking the sum of the all frequencies.
probability = N(E)/N(S)
the information given, there are 262 people are very prepared.
That is, N(A) = 262
The required probability is,
P(A) = 262/2206
= 0.119
The probability the next person surveyed is very prepared is 0.119.
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Four times the quotient of a number and 9 plus 14, how do I right it as an expression?
Answers
The expression is written as (4n/9) + 14
What is an expression?
An expression or mathematical expression is a finite collection of symbols that is well-formed according to context-dependent norms. To assist identify the sequence of operations and other features of logical syntax, mathematical symbols can denote numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. Many writers differentiate between an expression and a formula, with the former referring to a mathematical item and the latter referring to a statement about mathematical things. For instance, is a formula. However, in modern mathematics, and particularly in computer algebra, formulae are considered as expressions that may be evaluated as true or false based on the values assigned to the variables in the expressions.
The expression is written as (4n/9) + 14
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community gym charges a $50 membership fee and a $60 monthly fee. Workout gym charges a $225 fee and a $5 monthly fee. After how many months will the total amount paid to both gyms be the same?
Answers
Step 1 : Let's review the information given to us to answer the problem correctly:
Community Gym = $50 (Membership fee) + $ 60 (Monthly fee)
Workout Gym = $ 225 (Membership fee) + $ 5 (Monthly fee)
Step 2: Let's write the equation to answer the question, as follows:
Let x to represent the number of months that the total amount paid to both gyms will be the same
Community Gym = Workout Gym
Therefore,
50 + 60x = 225 + 5x
Like terms:
60x - 5x = 225 - 50
55x = 175
Dividing by 55 at both sides:
55x/55 = 175/55
x = 3.18 months
0.18 * 30 = 5.4 days
Step 3: Interpretation of the answer
Approximately after 3 months and 5 days and a half the total amount paid to both gyms will be the same
The two-way table shows the number of students that do or do not do chores at home and whether they receive an allowance or not. Allowance No Allowance Do Chores 13 3 Do Not Do Chores 5 4 a. How many total students do chores? b. What is the relative frequency of students that do chores and get an allowance to the number of students that do chores? Round to the nearest hundredth if necessary.
Answers
Given the table showing the number of students who do or do not perform chores, and who do or do not receive an allowance, we can add the numbers along the rows and columns, as shown in the diagram below:
Now, that we have summed the numbers along the vertical and horizontal directions, we can now proceed to answer the questions asked.
a.) The total number of students who do chores is equal to the horizontal sum of the numbers in the 'DO CHORES' row. This value is 16
Thus, 16 students do chores
b) The relative frequency of the students that do chores and get an allowance to the number of students that do chores is simply the ratio of the value in the cell that represents an intersection of the first 'DO CHORES' row, and the first 'ALLOWANCE' column, to the value that represents the sum of all the students that do chores ( i.e, the value at the end of the first row).
Thus, this is equal to = 13/16
Therefore, 13/16 is the relative frequency of the students that do chores and get an allowance to the number of students that do chores
c) The relative frequency of the students that do not do chores nor get an allowance to the total number of students, is simply the ratio of the value in the cell that represents an intersection of the second 'DO NOT DO CHORES' row, and the second 'NO ALLOWANCE' column, to the sum of the values in the last row or the last column.
Thus, this is equal to = 4/( 18 + 7) OR 4/(16 + 9) both of which is still 4/25
Therefore, 4/25 is the relative frequency of the students that do not do chores nor get an allowance to the total number of students.
d) The students who do not do chores are a total of 9
Of this 9, the number of students that do receive their allowance fall under the 'ALLOWANCE' column, and is equal to 5.
Therefore, expressed as a percentage of those who do not do their chores, the students who do not get an allowance are = (5/9) * 100 = 55% ( to the nearest whole number)
Thus 55% of students who do not do chores do not get an allowance