There are 150 people at an International Medical Conference. 40 are Africans, 70 are women and 110 are doctors. 12 of the women are Africans, 46 of the doctors are women and 31 of the Africans are doctors. If 5 of the African men are not doctors: a how many of the African women are doctors b how many of the men are neither African nor doctors?
Answers
Draw a Venn Diagram to visualize the situation:
Notice that the numbers in purple correspond to the total amount of people in the regions P and O, P and Q, P and S, respectively.
Numbers in red correspond to the number of people in each region.
Then, we should find the correct numbers for the regions O, P, Q and S, as well as M, N, R and T so that the total number of people in each group matches the labels.
Let x represent the amount of people in the region P.
Since the total amount of people in regions O and P must be 31, then the amount of people in O must be 31-x.
Similarly, the amount of people in region Q must be 12-x.
Since the amount of people in the region N (African men who are not doctors) is 5 and the total amount of African people is 40, then, we can write down an equation for x, where the sum of the amount of people in regions N, O, P and Q is 40:
[tex]5+(31-x)+x+(12-x)=40[/tex]Solve for x:
[tex]\begin{gathered} \Rightarrow5+31-x+x+12-x=40 \\ \Rightarrow48-x=40 \\ \therefore x=8 \end{gathered}[/tex]Notice that the number of people in region P, which is 8, corresponds to amount of African women who are doctors. Therefore, the answer for part a) is: 8.
To find how many of the men are neither African or doctors, find first the correct amount of people in regions R and T. This can be done by taking into account the total amount of people who are doctors and the total amount of people who are women.
The number of people in regions O, P, R and S must be equal to 110. For that to happen, the number of people in region R must be 41.
The amount of people in region T can be found similarly, and it is equal to 20.
Once the total amount of people in regions N, O, P, Q, R, S and T is known, we can deduce the number of people that must be in region M taking into account that the total amount of people in the conference is 150.
Substract the total amount of people in regions N to S (which is 139) from 150, in order to find the total amount of people in region M:
[tex]150-139=11[/tex]The region M corresponds to men who are neither African or doctors. Therefore, the answer to part b) is 11.
Related Questions
Evaluate the input/output table for the expression x - 9.Хy-101
Answers
x - 9
when x = -1
out put is -1 -9 = -10
when x = 0
Output is 0-9 = -9
when x = 1
output = 1-9 = -8
x y
-1 -10
0 -9
1 -8
I know the answer to fill i is -24 but how do I simplify ??
Answers
[tex]a^{-24\text{ }}=\frac{1}{a^{24}}[/tex]
The first expression es the simplified expression using the property of negative exponents.
Keico is selling rattle tickets to raise money for the sancol band. The odds againet winning a prize in the raffleare 121. What is the probability of winning a prize? Express your anewer as a decimal. if necessary, round youranower to the nearest thousandth.0 130 0.923O 0.083O 0.0777
Answers
Given:
The odds against winning a prize in the raffle are 12:1
[tex]\begin{gathered} \text{Probability of winning a prize=}\frac{1}{13} \\ \text{Probability of winning a prize=}0.077 \end{gathered}[/tex]0.077 is the probability of winning a prize.
Solve the quadratic equation by completing the square.4a²- 48a +52 = 0a= _,_
Answers
Given
[tex]4a^2-48a+52=0[/tex]Solution
[tex]\begin{gathered} 4a^2-48a+52=0 \\ So\text{ divide both sides by 4} \\ \frac{4a^2}{4}-\frac{48a}{4}+\frac{52}{4}=0 \\ which\text{ gives } \\ a^2-12a+13=0 \\ Keep\text{ a on LHS} \\ a^2-12a=-13 \\ Take\text{ the half of coefficient of a and square it} \\ (-\frac{12}{2})^2=36 \\ \\ rewrite\text{ as perfect square} \\ \\ (a-6)^2=-13+36 \\ (a-6)^2=23 \\ \end{gathered}[/tex][tex]\begin{gathered} a-6=\pm\sqrt{23} \\ a=6\pm\sqrt{23} \end{gathered}[/tex][tex]\begin{gathered} a=10.79583\text{ ,}a=1.20416 \\ or \\ a=6+\sqrt{23},\:a=6-\sqrt{23}\quad \\ \\ \end{gathered}[/tex]Convert the Cartesian equation x^2 + y^2 + 3y = 0 to a polar equation.r^2 = -3 sin θr = √3 sin θr = -3 sin θ
Answers
SOLUTION
From the question
[tex]x^2+y^2+3y=0[/tex]This becomes
[tex](x^2+y^2)+3y=0[/tex]In polar,
[tex]\begin{gathered} x^2+y^2=r^2 \\ \\ \text{and } \\ \\ y=r\sin \theta \end{gathered}[/tex]So, this becomes
[tex]\begin{gathered} r^2+3r\sin \theta=0 \\ \\ \frac{r^2}{r}=\frac{-3r\sin \theta}{r} \\ \\ r=-3\sin \theta \end{gathered}[/tex]1Convert without rounding:8into a decimal (no need to show work)Τ Τ Τ ΤParagraphVArialV3 (12pt)V
Answers
Given: the fraction 1/8.
Objective is to convert this fraction in to decimal.
[tex]\frac{1}{8}=0.125[/tex]Answer: 0.125
What is the missing step in this proof?A.Statement: 24 25, and 21 23.Reason: Alternate Interior Angles TheoremB.Statement: DÈ is parallel to AC.Reason: AB is a transversal cutting De and AC.C.Statement: 2124, and 23 25.Reason: Alternate Interior Angles TheoremD.Statement: 2124, and 23 25.Reason: 21 and 24, and 23 and 25 are pairs of supplementary angles.
Answers
Answer
Option C is correct.
Explanation
The alternate interior angles theorem explains that when two parallel lines are cut by a transversal, the alternate interior angles are congruent.
Hope this Helps!!!
Which expression is a factor of 9r2 – 4r + 1? F3r-1 Gr 1 H 9741 3 There are no real factors.
Answers
There are no real factors
Here, we want to factorize the given expression
To check if there are real factors, we will need to get the determinant
mathematically, we have this as;
[tex]D=b^2-4ac[/tex]where a is 9, b is -4 and c is 1
Substituting these values;
[tex]D=(-4)^2-4(9)(1)\text{ = 16-36 = -20}[/tex]As we can see, the value of the determinant is negative
Whenever the determinant value is negative, there are no real roots
Which lists all of the x-intercepts of the graphed function? A. (0,6)B. (1,0) and (2,0)C. (1,0), (2, 0), and (-3,0)D. (1,0), (2,0), (-3, 0), and (0, 6)
Answers
From the graph, the points at which the curve touch the x-axis is the intercepts on x
looking at the graph, the curve cut through the x axis at points -3, 1 and 2
hence the points will be
(-3, 0), (1, 0) and (2, 0)
Thus, the correct option is C;
(1, 0), (2, 0) and (-3, 0)
Eli and her sister are buying a present for their father. They want to buy him a tie that sings jingle bells. The Thai which is regularly $35 is on sale for 40% off because it is after the winter holidays. The girls will split the cost evenly and their mother gave them $15 to help with the cost of the tie. If the tax is 8%, how much will Eli and her sister each have to spend on their father's tie?
Answers
Answer:
Explanation:
The regular cost of the tie = $35
There is a sale for 40% off.
[tex]\text{Discount}=40\%\text{ of \$35}=\frac{40}{100}\times35=14[/tex]Thus, the price after the discount will be:
[tex]35-14=\$21[/tex]Next, the tax is 8%.
[tex]\text{Tax}=8\%\text{ of 21=}\frac{8}{100}\times21=\$1.68[/tex]Therefore, the total price at which the tie is purchased will be:
[tex]21+1.68=\$22.68[/tex]Since their mother gave them $15 to help with the cost of the tie, subtract 15.
[tex]22.68-15=\$7.68[/tex]This amount, $7.68 is the split between Eli and her sister.
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Coordinate R (1,5) S (6,-1) and T (1,-4) are connected to form ∆ RST if ∆ RST is congruent to ∆ RWT what are the coordinates of W
Answers
The triangles are similar, then ratio of corresponding sides of triangle are equal. The ratio of corresponding sides of two triangle RST and triangle RWT is,
[tex]\begin{gathered} \frac{RS}{RW}=\frac{RT}{RT} \\ \frac{RS}{RW}=1 \\ RS=RW \end{gathered}[/tex]Determine the length of side RS.
[tex]\begin{gathered} RS=\sqrt[]{(1-6)^2+(5+1)^2} \\ =\sqrt[]{25+36} \\ =\sqrt[]{61} \end{gathered}[/tex]So the distance between point RW is also equal to square root 61.
For option (-4,2),
[tex]\begin{gathered} RW=\sqrt[]{(-4-1)^2+(5-2)} \\ =\sqrt[]{25+9} \\ =\sqrt[]{36} \end{gathered}[/tex]For o(-6,-1),
[tex]\begin{gathered} RW=\sqrt[]{(-6-1)^2+(5+1)^2} \\ =\sqrt[]{49+36} \\ =\sqrt[]{85} \end{gathered}[/tex]For (-4,-1),
[tex]\begin{gathered} RW=\sqrt[]{(1+4)^2+(5+1)^2} \\ =\sqrt[]{25+36} \\ =\sqrt[]{61} \end{gathered}[/tex]So coordinate of point W is (-4,-1) as it give same distance of RS and RW.
Answer: (-4,-1)
Use the given information to create the equation for the rational function. The function is written in factored form to help you see how the given information shapes our equation. If the leading coefficient is not an integer enter the value as a fraction.Vertical asymptote at x=-1, double zero at x=2, y-intercept at (0,2).The numerator is: Answer (x-Answer )(x-Answer )The denominator is: (x+Answer )
Answers
Given:
• Vertical asymptote at : x = -1
,• Double zero at: x = 2
,• y-intercept at: (0, 2)
Let's create the equation for the rational function using the given properties.
Since the vertical asymptote is at x = -1, to find the deominator of the equation, equate the vertical asymptote to zero.
Add 1 to both sides:
[tex]\begin{gathered} x+1=-1+1 \\ x+1=0 \end{gathered}[/tex]Therefore, the denominator of the function is ==> x + 1
Since it has a double zero at x = 2, we have the factors:
[tex]\Longrightarrow(x-2)(x-2)[/tex]We now have the equation:
[tex]y=\frac{a(x-2)(x-2)}{x+1}[/tex]Also, the y-intercept is at: (0, 2)
To find the value o a, substitute 2 for y and 0 for x then evaluate:
[tex]\begin{gathered} 2=\frac{a(0-2)(0-2)}{0+1} \\ \\ 2=\frac{a(-2)(-2)}{1} \\ \\ 4a=2 \\ \\ a=\frac{2}{4} \\ \\ a=\frac{1}{2} \end{gathered}[/tex]Therefore, the rational function is:
[tex]y=\frac{\frac{1}{2}(x-2)(x-2)}{x+1}[/tex]ANSWER:
[tex]y=\frac{\frac{1}{2}(x-2)(x-2)}{x+1}[/tex][tex]\begin{gathered} \text{Numerator: }\frac{1}{2}(x-2)(x-2) \\ \\ \\ \text{Denominator: (x + 1)} \end{gathered}[/tex]Is the ordered pair (3,-4) a solution to : 5x-2y=17
Answers
Given
[tex]5x-2y=17[/tex]Set x=3 and solve for y, as shown below
[tex]\begin{gathered} x=3 \\ \Rightarrow5*3-2y=17 \\ \Rightarrow15-2y=17 \\ \Rightarrow-2y=2 \\ \Rightarrow y=-1 \end{gathered}[/tex]Therefore, a solution to the equation is the ordered pair (3,-1).
(3,-4) cannot be a solution to the equation.find the volume for the spear shown to The Right. Use 3.14 for pi sphere is 5.8
Answers
Semicircle perimeter is 5.8 m
THEN
2π • R + 2R = 5.8
R = 5.8/(2π + 2) = 0.7 meters
Now find Volume
Volume V = (4/3)•π•R^3
V= (4/3)•π•(0.7^3) = 1.438 cubic meters
V=. 1.438 m^3
Write an inequality to match the statement.The difference of a number x and 7 is less than or equal to the sum of the same number x and 5
Answers
The difference of a number x and 7 is less than or equal to the sum of the same number x and 5
The difference means subtraction.
A number is x
Less than or equal is represented with the symbol ≤
So:
The difference of a number x and 7
x-7
is less than or equal to the sum of the same number x and 5
≤ x+5
Altogether:
x-7≤ x+5
Triangle JKL is rotated 270° counterclockwise about the origin to form triangle J'K'L'. What is the y-coordinate of point J'? y 6 5 4 K 3 2. 1 -6 -5 -4 -3 -2 1 2 3 4 0 -1 6 Jo -2 3 4 -5 L -6 Type the answer in the box.
Answers
Rotation of 270° ,counterclockwise
Find center point of triangle
JK = √ 9^2 +5^2
. = √ 106
JL = √9^2 + 3^2
. = √90
KL = 8
Then now find point J'
Distance from J to origin = JO = √4^2+2^2 =√20
Angle is arctan (2/4) = 26.56°
Then new coordinates J' are
Angle 270+26.56 = 296.56°
From origin trace a line perpendicular to JO
then
y = √20• Cos 26°
y = 4
Answer:
-4
Step-by-step explanation:
good luck kiddos :)
Fill in the following values for a 45-45-90 triangle Leg Leg Hypotenuse 5 А B C С D 32 Fill in the following values for a 30-60-90 triangle Short Leg Long Leg Hypotenuse 6 E H 20 G
Answers
First Part 45-45-90 Triangle
first triangle
where the two angles different to 90° are same, the measure of the legsof the triangle are the same
then
[tex]A=5[/tex]and to calculate B or the hypotenuse we use pythagoras
[tex]a^2+b^2=h^2[/tex]where a and b are legs and h the hypotenuse
replacing
[tex]\begin{gathered} 5^2+5^2=h^2 \\ 25+25=h^2 \\ 50=h^2 \\ h=\sqrt[]{50} \\ h=5\sqrt[]{2} \end{gathered}[/tex]the hypotenuse or B is
[tex]B=5\sqrt[]{2}[/tex]Second triangle
legs of the triangle have the same value then if we apply pythagoras
[tex]a^2+b^2=h^2[/tex]and replace the legs with the same value(a)
[tex]\begin{gathered} a^2+a^2=h^2 \\ 2a^2=h^2 \end{gathered}[/tex]we can replace the hypotenuse and solve a
[tex]\begin{gathered} 2a^2=(3\sqrt[]{2})^2 \\ 2a^2=18 \\ a^2=\frac{18}{2} \\ \\ a=\sqrt[]{9} \\ a=3 \end{gathered}[/tex]value of each leg is 3 units, then
[tex]C=D=3[/tex]Second part 30-60-90 triangle
First triangle
we use trigonometric ratios to solve, for example I can use tangent for the angle 60 to find E
[tex]\tan (\alpha)=\frac{O}{A}[/tex]where alpha is the angle, O the oppiste side of the angle and A the adjacet side of the angle
using angle 60°
[tex]\begin{gathered} \tan (60)=\frac{E}{6} \\ \\ E=6\tan (60) \\ \\ E=6\sqrt[]{3} \end{gathered}[/tex]now using sine we calculate F or the hypotenuse
[tex]\sin (\alpha)=\frac{O}{H}[/tex]where alpha is the angle, O the opposite side from the angle and H the hypotenuse
using angle 60°
[tex]\begin{gathered} \sin (60)=\frac{E}{F} \\ \\ F=\frac{E}{\sin (60)} \\ \\ F=\frac{6\sqrt[]{3}}{\sin (60)} \\ \\ F=12 \end{gathered}[/tex]Second triangle
we use sine with 60° to find H
[tex]\begin{gathered} \sin (\alpha)=\frac{O}{h} \\ \\ \sin (60)=\frac{H}{20} \\ \\ H=20\sin (60) \\ H=10\sqrt[]{3} \end{gathered}[/tex]use cosine with 60° to find G
[tex]\begin{gathered} \cos (\alpha)=\frac{A}{h} \\ \\ \cos (60)=\frac{G}{20} \\ \\ G=20\cos (60) \\ \\ G=10 \end{gathered}[/tex]Final Values
[tex]\begin{gathered} A=5 \\ B=5\sqrt[]{2} \\ C=3 \\ D=3 \\ E=6\sqrt[]{3} \\ F=12 \\ G=10 \\ H=10\sqrt[]{3} \end{gathered}[/tex]determine whether the triangle with the given side lengths is a right triangle4 ,7, 11
Answers
For the a triangle to be a right angle triangle, the length of the three sides must form a pythagorean triple. This means that if we apply pythagoras theorem, the square of the length of the longest side must equal the sum of the squares of the length of the other sides. This means that
11^2 must be equal to 4^2 + 7^2
11^ = 121
4^2 + 7^2 = 16 + 49 = 65
Since they are not equal, then the triangle with the given sides, 4, 7, 11 cannot form a right angle triangle.
A storage container is 3 feet long, 5 feet wide, and 6 feet tall. if the diameter of a baseball is about 1.43 inches, approximately how many basketballs fit in the container? ( volume of a sphere is V = 4/3pi^3)
Answers
First, let's find the volume of the storage container:
Vs = 3*5*6 = 90 ft³
Now, let's do a conversion:
1.43 in * 1ft/12in = 0.119 ft
The radius is the diameter divide by 2:
r = 0.119/2 = 0.059583 ft
Let's find the volume of the baseball:
V = 4/3 π r³ = 4/3 π (0.059583)³ = 0.000886 ft³
Now divide the volume of the storage container by the volume of the baseball:
90/0.000886 ≈ 101573
Approximately 101573 balls fit in the container
N5 pointsSketch the graph of the piecewise function below. Make sure your graph is cle-4,4% -3f(x) = -x + 3, - 3 341 Dra5
Answers
We are asked to plot the piecewise function given by:
SO we notice two points where the function graph is going to change:
x = -3 , and x = 3
We plot it in pieces :
Notice the endpoints of the different segments as "solid dots" or "empty dots" depending on the retrictions of the domain as given in the instructions.
divide 406 by -14 A) -29B) -34C) 34D) 44
Answers
The correct answer is -29 (option A)
Mixture of 40 liters of paint is 25% red tint, 30% yellow tint and 45% water. Five liters of red tint and five liters of yellow tint are added to the original mixture. What is the percent of water in this new mixture?
Answers
Step 1
25% of 40 litres is;
[tex]\frac{25}{100}\times40=10\text{ litres of red tint}[/tex]Step 2
30% of 40 litres;
[tex]\frac{30}{100}\times40=\text{ 12 litres of yellow tint}[/tex]Step 3
45% of 40 litres;
[tex]\frac{45}{100}\times40=18\text{ litres}[/tex]Step 4
5 liters of red tint are added and 5 liters of yellow tint are added to the original mixtures
[tex]\begin{gathered} 10\text{ +5=15 litres of red tint} \\ 12+5=17\text{ liters of yellow tint} \\ 18\text{ liters of water} \end{gathered}[/tex]Answer; What is the percent of water in this new mixture?
[tex]\begin{gathered} Total=15+17+18=50\text{ liters} \\ \frac{18}{50}\times100=36\text{\%} \end{gathered}[/tex]17) Determine if the number is rational (R) or irrational (I)
Answers
Given the number:
[tex]71.\bar{5186}[/tex]You can identify that there is a line about the first four decimal digits. That indicates that is a Repeating Decimal or Recurring Decimals.
Repeating Decimals are defined as those numbers whose decimal part becomes periodic.
By definition, Rational Numbers are those numbers that can be written as a simple fraction whose numerator and denominator are both integers.
By definition, Repeating Decimals are Rational Numbers.
Hence, the answer is: It is a Rational Number.
A floor tile is 2 feet wide. Convert the width to inches.
Answers
Solution
- The conversion from feet to inches is given below:
[tex]1ft\to12inches[/tex]- We are told that the tile is 2ft wide. Thus, we can convert the width to inches using the above conversion as follows:
[tex]\begin{gathered} \frac{12\text{ in}}{1\text{ ft}}=\frac{x\text{ in}}{2\text{ ft}} \\ \\ \text{ Multiply both sides by 2} \\ x=\frac{12\times2}{1} \\ \\ \therefore x=24inches \end{gathered}[/tex]Final Answer
The answer is 24 inches
If a population isa sample of the population could be
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REQUIRED;
To identify which of the statements given properly depicts the population and the sample.
Explanation:
In statistics and research processes, a population ideally refers to the entire group that we want to study and reach conclusions about. It can best be described as all-inclusive.
On the other hand, a sample is a portion taken out of an entire population for the purpose of studies or research and the appropriate data is collected from these.
We shall now examine the options given one after the other.
(A) Registered state voters randomly collected for a poll; all citizens of the state. This represents SAMPLE and POPULATION
(B) All professional football players; all professional athletes. This represents POPULATION and POPULATION
(C) All customers at a shopping mall; people who purchased shoes. This represents POPULATION and SAMPLE.
(D) Passengers with window seats; all passengers on an airplane. This represents SAMPLE and POPULATION.
ANSWER:
Therefore, the correct answer is OPTION C.
"If a population is all customers at a shopping mall, a sample of the population could be peole who purchased shoes.
What are the new coordinates of the point (-2,1) after undergoing the transformation?
Answers
Given the following rule of a transformation:
[tex]P(x,y)\rightarrow P^{\prime}(x+2,2y)[/tex]We will find the new coordinates of the point (-2,1) after undergoing the transformation.
[tex](-2,1)\rightarrow(-2+2,2(1)=(0,2)[/tex]So, the answer will be the last option (0, 2)
a laptop has listed of a price of 548.98 before tax. If the sales tax rate is 8.75%, find the total cost of the laptop with sales taxes included round to nearest cent
Answers
we have to add to the original price the tax part. So we get
[tex]548.98+548.98\cdot0.0875=597.01575\approx597.02[/tex]2) A scuba diver descends to a location that is -12 1/3 m relative to sea level. He then descends another 8 1/4 M. What is the scuba divers final location relative to sea level.
NUMBERS ONLY
Answers
Answer:
-26 m
Step-by-step explanation:
you take away 8 1/4 from original
Find a standard deviation of the binomial for which N = 420 and P = 0.90. Answer choices 37.86.153786.2
Answers
The standard deviation σ is given by:
[tex]\begin{gathered} \sigma=\sqrt{np(1-p)} \\ \text{ Where} \\ p=\text{ the probability of success} \\ n=\text{ number of trials} \end{gathered}[/tex]Substitute n = 420 and p = 0.90 into the formula:
[tex]\sigma=\sqrt{420\cdot0.90(0.10)}\approx6.15[/tex]Hence the correct answer is 6.15
Second Choice
a bowling alley charges its customers an hourly rate to bowl plus shoe rental. The hourly rates are per Lane. a linear model of this situation contains the values (2,39) and (3, 56.25), where x represents the number of hours bowled on one lane, and why represents the total cost for bowling.
Answers
Answer:
[tex]\$17.25[/tex]Explanation: We have to find the hourly rate to bowl, provided the following information:
[tex]\begin{gathered} (x_1,y_1)=(2,39) \\ (x_2,y_2)=(3,56.25) \end{gathered}[/tex]Where x is the number of hours and y is the total cost.
[tex]\begin{gathered} y(x)=mx \\ m=\frac{\Delta y}{\Delta x}=\frac{y_2-y_1}{x_2-x_1} \\ m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{56.25-39}{3-2} \\ m=\frac{56.25-39}{3-2}=\frac{\$17.25}{1hr} \\ m=\frac{\operatorname{\$}\times17.25}{1hr} \\ \therefore\rightarrow \\ y(x)=17.25x \end{gathered}[/tex]Therefore it costs $17.25 for an hour to bowl.