Answer:
40
Step-by-step explanation:
Assign the variable x to Devaughn's age. If Devaughn is 7 years older than Sydney, then Sydney must be 7 years younger than him, so the expression x - 7 can represent Sydney's age.
The sum of their ages would be x + x - 7 or 2x - 7 which is also said to equal 87. Therefore, this can be written as an equation and be solved accordingly:
2x - 7 = 87
2x = 94
x = 47
Therefore, Devaughn is 47 and Sydney, who is 7 years younger, is 40.
Sydney's age is determined by setting up and solving a simple algebraic equation based on the information provided. The equation that represents this situation is S + (S + 7) = 87, which leads to the conclusion that Sydney is 40 years old.
Explanation:Devaughn is 7 years older than Sydney. Given that the sum of their ages is 87, we can represent this situation with algebra. Let's denote Sydney's age as S.
Considering Devaughn is 7 years older, we can represent his age as S + 7. Given that the sum of their ages is 87, we can write down this equation: S + (S + 7) = 87.
Solving this equation will help us find Sydney's age. First, simplify the left side: 2S + 7 = 87. Then, subtract 7 from both sides: 2S = 80. Finally, divide both sides by 2 to solve for S, yielding Sydney's age: S = 40.
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Penny paid off a loan with a simple interest rate of 11% in 6 months. What was the APR?
Answer:
The solution is Option C.
The annual percentage rate of Penny is 22.4 %
Step-by-step explanation:
Select whether each of these factors was a reason for or against American neutrality. US trade with Europe was worth almost one billion dollars. for against Intro
________________________
Sunny ko behan mil gayi sonali ✨
The United States' decision to remain neutral was motivated by its over $1 billion in annual trade with Europe.
Why did American neutrality benefit from commerce with Europe?Early 20th-century American trade with Europe helped the US remain neutral by enabling it to maintain business ties with both the Allied and Central Powers.
The US was able to avoid taking a political stance and maintain its neutral status by supplying goods to both sides of the conflict. Additionally, trade helped the US maintain its economic stability because it would have been detrimental to the nation's economy to break off trade with one party.
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there are 12 balls to every 2 pits. If Fred has 40 balls in his room, how many pits are in his room?
Your answer may be exact or accurate to the nearest tenth.
if Fred has 40 balls in his room then there are 7 pits in his room.
What is Ratio?A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.
Given that there are 12 balls to every 2 pits
Fred has 40 balls in his room
We have to find the number of pits for 40 balls
Let x be the number of pits for 40 balls.
Form an proportional equation
12/2=40/x
6=40/x
x=40/6=20/3
x=6.667=7
Hence, if Fred has 40 balls in his room then there are 7 pits in his room.
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The distance versus time graph for Object A and Object B are shown.
A graph titles Distance vs Time. A curved line is drawn through point 10 on y axis and this line is labeled Object A. The graph for Object B is a straight slanting line passing through the origin
Which statement best describes the motion of Object A and Object B?
Both objects move with variable speed.
Both objects move with constant speed.
Object A moves with constant speed and Object B moves with variable speed.
Object A moves with variable speed and Object B moves with constant speed.
Object A moves with variable speed and Object B moves with constant speed.
The correct option is D.
What is proportional relationship?A proportional relationship is a relationship between two expressions and where changes in one expression means some constant change in the other expression as well. Generally, it is represented as x/y = k, where x and y are two expressions and k is constant.
Given:
A graph titles Distance vs time.
A curved line is drawn through point 10 on y-axis and this line is labeled Object A.
The graph of the object A is shown as a curved line.
The graph for Object B is a straight slanting line passing through the origin.
The graph for Object B is a linear proportional relationship.
So, Object A moves with variable speed and Object B moves with constant speed.
Therefore, object A moves with variable speed and Object B moves with constant speed.
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Find an equation in point-slope for the line having the slope m=5. and containing the point (3,4)
Answer:
slope:m=5m=5
Step-by-step explanation:
Step-by-step explanation:
y-y1=m (x-x1)
y-4=5 (x-3)
y-4=5x-15
5x-y=11
Central Angles
please type the solution and determine if it's minor or major arc or semi circle
need asap
Answer:
∠YPV = 50°
∠XPV = 130°
∠WPZ = 85°
1. Arc YZ is a minor arc.
2. Arc WX is a minor arc.
3. ∠VPZ = 95°
4. Arc VZ is a minor arc.
5. Arc VWX is a major arc.
6. Arc ZVW is a major arc.
7. Arc YWZ is a major arc.
8. Arc ZXW is a major arc.
9. ∠VPX = 130°
10. Arc XVY is a semicircle.
11. Arc XWY is a semicircle.
12. Arc WZX is a major arc.
Step-by-step explanation:
As WV and XY are diameters, and ∠WPX = 50° then according to the vertical angles theorem, ∠YPV = 50°.
As VW is a diameter of circle P, and angles on a straight line sum to 180°:
⇒ ∠WPX + ∠XPV = 180°
⇒ 50° + ∠XPV = 180°
⇒ ∠XPV = 130°
As XY is a diameter of circle P, and angles on a straight line sum to 180°:
⇒ ∠WPZ + ∠ZPY + ∠YPV = 180°
⇒ ∠WPZ + 45° + 50° = 180°
⇒ ∠WPZ + 95° = 180°
⇒ ∠WPZ = 85°
Add the central angles to the given circle diagram (see attachment).
Definition of ArcsMinor arc: An arc whose measure is less than 180°.Note that two-letter arcs might not necessarily be minor arcs if their measure is more than 180°. Therefore, use circle P to double-check each two-letter arc.
Note that three-letter arcs might not necessarily be major arcs if their measure is less than 180°. Therefore, use circle P to double-check each three-letter arc.
As WV and XY are diameters of circle P, when the endpoints of a three-letter arc are the endpoints of one diameter, the arc will be a semicircle.
1. Arc YZ is a minor arc.
2. Arc WX is a minor arc.
3. ∠VPZ = 50° + 45° = 95°
4. Arc VZ is a minor arc.
5. Arc VWX is a major arc: Start at endpoint V, move counterclockwise around the circle through point W through to endpoint X.
6. Arc ZVW is a major arc: Start at endpoint Z, move clockwise around the circle through point V through to endpoint W.
7. Arc YWZ is a major arc: Start at endpoint Y, move clockwise around the circle through point W through to endpoint Z.
8. Arc ZXW is a major arc: Start at endpoint Z, move clockwise around the circle through point X through to endpoint W.
9. ∠VPX = 130°
10. Arc XVY is a semicircle.
11. Arc XWY is a semicircle.
12. Arc WZX is a major arc: Start at endpoint W, move clockwise around the circle through point Z through to endpoint X.
The answers to the respective arcs are given as follows:
∠YPV = 50°∠XPV = 130°∠WPZ = 85°Arc YZ is a minor arc.Arc WX is a minor arc.∠VPZ = 95°Arc VZ is a minor arc.Arc VWX is a major arc.Arc ZVW is a major arc.Arc YWZ is a major arc.Arc ZXW is a major arc.∠VPX = 130°Arc XVY is a semicircle.Arc XWY is a semicircle.Arc WZX is a major arc. What is a Major or Minor Arc?The arcs are defined as follows:
Minor arc: An arc whose measure is less than 180°. Minor arcs are named using the two letters of the endpoints. The two letters can be in any order.Major arc: An arc whose measure is greater than 180°. Major arcs are named using three letters. The two letters at the end of the name are the endpoints of the arc. The middle letter is the name of the point contained in the arc.Semicircle: An arc whose measure is equal to 180°.It is to be noted that two-letter arcs might not necessarily be minor arcs if their measure is more than 180°. Therefore, use circle P to double-check each two-letter arc.
Also, three-letter arcs might not necessarily be major arcs if their measure is less than 180°. Therefore, use circle P to double-check each three-letter arc.
To solve for the arcs:
Given that WV and XY are diameters, and ∠WPX = 50° then according to the vertical angles theorem, ∠YPV = 50°.
As VW is a diameter of circle P, and angles on a straight line sum to 180°:
⇒ ∠WPX + ∠XPV = 180°
⇒ 50° + ∠XPV = 180°
⇒ ∠XPV = 130°
Since XY is a diameter of circle P, and angles on a straight line sum to 180°:
⇒ ∠WPZ + ∠ZPY + ∠YPV = 180°
⇒ ∠WPZ + 45° + 50° = 180°
⇒ ∠WPZ + 95° = 180°
⇒ ∠WPZ = 85°
Given that WV and XY are diameters of circle P, when the endpoints of a three-letter arc are the endpoints of one diameter, the arc will be a semicircle. Thus,
1. Arc YZ is a minor arc.
2. Arc WX is a minor arc.
3. ∠VPZ = 50° + 45° = 95°
4. Arc VZ is a minor arc.
5. Arc VWX is a major arc: Start at endpoint V, move counterclockwise around the circle through point W through to endpoint X.
6. Arc ZVW is a major arc: Start at endpoint Z, move clockwise around the circle through point V through to endpoint W.
7. Arc YWZ is a major arc: Start at endpoint Y, move clockwise around the circle through point W through to endpoint Z.
8. Arc ZXW is a major arc: Start at endpoint Z, move clockwise around the circle through point X through to endpoint W.
9. ∠VPX = 130°
10. Arc XVY is a semicircle.
11. Arc XWY is a semicircle.
12. Arc WZX is a major arc: Start at endpoint W, move clockwise around the circle through point Z through to endpoint X.
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Algebra homework. Help!
(the tail points right on the number line), the mean is higher than the median.
What is median?
The value of the middle observation found after the data are arranged in ascending order is referred to as the median of the data. In many cases, it is challenging to take all of the facts into account when representing something, and in these cases, median is helpful. The median is one of the simples to compute statistical summary metrics. The median is also known as the place average since it uses the data that is in the center of a sequence to determine its value.
Every student learns one of the fundamental principles of statistics, which is that in a skewed distribution, the mean is closer to the tail, in around the second week of introductory statistics.
Every student learns one of the fundamental principles of statistics, which is that in a skewed distribution, the mean is closer to the tail, in around the second week of introduction to statistics. Therefore, the mean is greater than the median in a right-skewed distribution (where the tail points directly to the right on the number line).
Hence, (the tail points right on the number line), the mean is higher than the median.
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Find an angle θ that is coterminal with an angle, in radians, measuring 14π/3, where 0≤θ<2π. Give your answer as an exact answer involving π, if necessary.
The angle θ that is coterminal with angle 14π/3, is 20π/3
What is coterminal angle?Coterminal angles are the angles that have the same initial side and share the terminal sides. These angles occupy the standard position, though their values are different. They are on the same sides, in the same quadrant and their vertices are identical.
Given that, we need to find a coterminal angle of 14π/3,
The formula to find the coterminal angles is, θ ± 2πn where, n is an integer and it denotes the number of rotations around the coordinate plane.
For finding one coterminal angle: n = 1 (anticlockwise)
Then the corresponding coterminal angle is,
= 14π/3 + 2πn
= 14π/3 + 2π(1)
= 14π/3 + 2π
= 20π/3
Hence, the angle θ that is coterminal with angle 14π/3, is 20π/3
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Jan made fruit cups. She had 15 apple slices, 20 orange slices and 60 grapes. She put the same amount of each type of fruit into each cup. What is the greatest number of fruit cups she could have made?
Answer:
5
Step-by-step explanation:
The greatest common factor between all 3 fruits is 5. There would be 3 apple slices, 4 oranges, and 12 grapes per cup.
Using substitution, what is the solution for the system of equations below..
y = -1x + 6
y = -12x - 5
Answer:
Step-by-step explanation:
Solve the System of Equations
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(−1,7)
Equation Form:
x=−1,y=7
The sum of 3x and 70 exceeds 13x
The algebraic representation of the sentence the sum of 3x and 70 exceeds 13x is: 3x + 70 > 13x.
What is algebraic expression?The concept of algebraic expressions is the use of letters or alphabets to represent numbers without providing their precise values. We learned how to express an unknown value using letters like x, y, and z in the fundamentals of algebra. Here, we refer to these letters as variables. Variables and constants can both be used in an algebraic expression. A coefficient is any value that is added before a variable and then multiplied by it.
Given that the sum of 3x and 70 exceeds 13x, this is represented as:
3x + 70 >13x
Hence, the algebraic representation of the sentence the sum of 3x and 70 exceeds 13x is: 3x + 70 > 13x.
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Please help, show all work too
The solution to the integral ∫ [csc x · (cot x + csc x)] dx is - (csc x + cot x) + C. (Correct choice: A)
How to solve an integral by integral tables
In this problem we find the case of an integral involving trigonometric functions, this can be solved quickly by means of algebra properties and integral tables. Integral tables are an useful resource to find the result of integrals that require a lot of time to be solved.
First, write the function within the integration operator and simplify by algebra properties:
csc x · (cot x + csc x)
csc x · cot x + csc² x
Second, rewrite the integral by integral properties:
∫ [csc x · (cot x + csc x)] dx = ∫ csc x · cot x dx + ∫ csc² x dx
Third, use integral tables to find the solution to the integral:
∫ [csc x · (cot x + csc x)] dx = - csc x - cot x + C
∫ [csc x · (cot x + csc x)] dx = - (csc x + cot x) + C
Where is C is the integration constant.
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Imagine you start with $1.00 in a bank account that pays 100% interest per year. If the interest is credited once (annually) at the end of the year, the value of the account at year end will be $2.00. If the interest is credited twice in the year (semi-annually), the interest rate for each 6 months will be 50% (100%/2), so the initial $1 is multiplied by 1.5 twice (1 to include the original principal and .5 to add 50% more), yielding $1.00×1.52= $2.25 at the end of the year. Compounding quarterly yields $1.00×1.254= $2.4414. This formula can be written as: Where n is the number of times that interest is credited or compounded per year. 1. Calculate the value of the $1 investment if the interest is compounded (round to 3 decimal places). Show all work. a. Monthly b. Weekly c. Daily d. 1000 times in a year 2. Is there a big difference between compounding monthly and 1000 times/year? Is this a surprising result to you? Use complete sentences.
The result is the same, $2.7048. This result is not surprising because as the number of compounding periods increases, the difference between the amount after each compounding period becomes smaller and smaller. Eventually, the amount after compounding reaches a limit, which is $2.7048 in this case.
How solve the problem?a. To calculate the value of the investment compounded monthly, the formula to use is:
A = P * (1 + r/m)^(mt)
where P is the principal, r is the annual interest rate (100% in this case), t is the time in years (1 in this case), m is the number of times compounded in a year (12 in this case), and A is the amount after compounding.
A = $1.00 * (1 + 100% / 12)^(12 * 1)
A = $1.00 * (1 + 100% / 12)^12
A = $1.00 * (1.0083)^12
A = $1.0083^12
A = $2.682
b. To calculate the value of the investment compounded weekly, the formula to use is:
A = P * (1 + r/m)^(mt)
where P is the principal, r is the annual interest rate (100% in this case), t is the time in years (1 in this case), m is the number of times compounded in a year (52 in this case), and A is the amount after compounding.
A = $1.00 * (1 + 100% / 52)^(52 * 1)
A = $1.00 * (1 + 100% / 52)^52
A = $1.00 * (1.00192)^52
A = $1.00192^52
A = $2.7005
c. To calculate the value of the investment compounded daily, the formula to use is:
A = P * (1 + r/m)^(mt)
where P is the principal, r is the annual interest rate (100% in this case), t is the time in years (1 in this case), m is the number of times compounded in a year (365 in this case), and A is the amount after compounding.
A = $1.00 * (1 + 100% / 365)^(365 * 1)
A = $1.00 * (1 + 100% / 365)^365
A = $1.00 * (1.00027)^365
A = $1.00027^365
A = $2.7048
d. To calculate the value of the investment compounded 1000 times in a year, the formula to use is:
A = P * (1 + r/m)^(mt)
where P is the principal, r is the annual interest rate (100% in this case), t is the time in years (1 in this case), m is the number of times compounded in a year (1000 in this case), and A is the amount after compounding.
A = $1.00 * (1 + 100% / 1000)^(1000 * 1)
A = $1.00 * (1 + 100% / 1000)^1000
A = $1.00 * (1.001)^1000
A = $1.001^1000
A = $2.7048
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Find 4th, 9th and 10th term for each of 3, 6, 12, 24. following geometric progress issions
A series of terms is referred to as a geometric progression if each next term is produced by multiplying each previous term by a fixed amount. (GP), whereas the common ratio is the name given to the constant value. In the case of the GP 2, 4, 8, 16, 32, 64, for instance, the common ratio is 2.
What is the GP equation?The phrase that comes after the previous one in the GP, having a common ratio of r = l/[r(n-1)]. S=a/(1 - r), where 0 r 1, is the sum of infinite, or the sum of a GP with infinite terms.
What does GP number mean?A number progression is said to as a geometric progression if any two consecutive terms is always same.
Hence we have a=3,n=9,r=2
Now [tex]t=ar^n^-^![/tex]
=[tex]3*2^9^-^1[/tex]
=[tex]3*2^8[/tex]
=3×256
=768
∴ The ninth term of the G.P. is 768.
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In a survey, the planning value for the population proportion is p*= 0.25. How large a sample should be taken to provide a 95% confidence interval with a margin of error of 0.06? Round your answer up to the next
whole number.
The sample should be taken to provide a 95% confidence interval is 200.
What is a confidence interval?A confidence interval is made up of the mean of your estimate plus and minus the estimate's range. This is the range of values you expect your estimate to fall within if you repeat the test, within a given level of confidence.
Confidence is another name for probability in statistics.
Given the planning value for the population proportion,
probability, p = 0.25
q = 1 - p = 1 - 0.25
q = 0.75
margin of error = E = 0.06
value of z at 95% confidence interval is 1.96,
the formula for a sample is,
n = (z/E)²pq
n = (1.96/0.06)²*0.25*0.75
n = 200.08
n = 200 approx
Hence sample size is 200.
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Initial Knowledge Check
Question 3
Christine publishes a blog on bird-watching, with field notes and pictures of her trips around the country. Recently she decided to conduct a poll among 600 of
her subscribers, and found that 71% of those polled have liked at least one of her blogs, they have posted an average of 1.8 comments per blog, and 128 have
liked all of her blogs. Later she found out that her website already has this information for all of her subscribers. According to her website, she has a total of
12,683 subscribers, of whom 68% have liked at least one of her blogs, they have posted an average of 1.5 comments per blog, and 3781 have liked all of her
blogs.
(a) For Christine's blog poll, identify the population and the sample.
Population:
(Choose one)
Sample: (Choose one)
(b) Choose whether each number described below is a parameter or a statistic for Christine's blog poll.
Number
The average of 1.8 comments per blog that the 600 subscribers polled have posted
The 3781 subscribers among all the subscribers to Christine's blog who like all of her blogs
The 68% of all the subscribers to Christine's blog who like at least one blog?
a) The sample and the population are given as follows:
Sample: 600 subscribers.Population: Total of 12683 subscribers.b) The numbers are classified as follows:
The average of 1.8 comments per blog that the 600 subscribers polled have posted: statistic.The 3781 subscribers among all the subscribers to Christine's blog who like all of her blogs: parameter.The 68% of all the subscribers to Christine's blog who like at least one blog: parameter.What is population and sample?Population: Collection or set of individuals or objects or events whose properties will be studied.
Sample: The sample is a subset of the population, and a well chosen sample, that is, a representative sample will contain most of the information about the population parameter. A representative sample means that all groups of the population are inserted into the sample.
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According to the US Census Bureau, the population of the state of Arizona was 5,130,632 people, in the year 2000. In the year 2010, it was 6,392,017 people
1. Use this information to express the population as a linear function of time since the year 2000. (Make sure to define the variables you use.) .
2. What does this model predict that the population will be in the year 2019?
Q2 Linear Functions
A solar water heater costs about $5800 to install. A traditional gas water heater costs about $900 to install and about $325 per year to use. The average annual cost to use the solar water heater is about $90.
Q2.1 Part a)
Grading comment:
Create a total cost function for the solar water heater.
Create a total cost function for the gas water heater.
Make sure to label each function, define your variables, and use proper notation.
Q2.2 Part b)
Graph the functions that you created on the same set of axes. (Make sure to label the axes, label all important points, use an appropriate scale, and use an appropriate window).
How many years would you need to use a solar water heater in order for the total cost to become less than the total cost of the gas water heater? How do you know?
Answer:lmkmonmklmlkmlkn
Step-by-step explanation:;lmklmlkmlkm
Find the average rate of change of the function f(x)=9/-3x+4, on the interval [3,5]
The average rate of change of the function f(x)=9/-3x+4, on the interval [3,5] is 1.
What is function?A function is a process or set of instructions that takes inputs, performs a specific task, and produces an output. Functions are key components of programming languages, allowing the coder to create complex commands with simple instructions. For example, a function can be used to add two numbers together or to generate a random number. Functions can also be combined to create more complex sequences of instructions.
The average rate of change of the function f(x)=9/-3x+4, on the interval [3,5] can be determined by taking the difference of the output values of the function at the endpoints of the interval, and then dividing it by the difference of the input values of the interval.
The output of the function at x=3 is f(3)=9/-3*3 +4 = -5,
and the output of the function at x=5 is f(5)=9/-3*5 +4 = -3.
Therefore, the difference of the output values is f(5)-f(3) = -3 - (-5) = 2
The difference of the input values is 5-3 = 2
Therefore, the average rate of change of the function on the interval [3,5] is f(5)-f(3) / (5-3) = 2/2 = 1.
Hence, the average rate of change of the function f(x)=9/-3x+4, on the interval [3,5] is 1.
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Using the rules of inference show that s is a conclusion
1. p → q
2. q → r
3. (q → r) → s
4. p
how to solve?
"s" can be concluded from the premises
How to show that s is the conclusionTo use the rules of inference to show that "s" is a conclusion, we can use modus ponens,
This is a rule that allows us to infer a conclusion from a premise and its conditional statement.
Using modus ponens, we can infer "q" from "p → q" and "p".Next, using modus ponens, we can infer "r" from "q → r" and "q".Finally, using modus ponens, we can infer "s" from "(q → r) → s" and "q → r".Thus, "s" can be concluded from the premises "p → q", "q → r", "(q → r) → s", and "p".
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Aiden paid $180 in interest for a loan of $2000. what would the loan have been if he had paid $270 in interest instead
Answer: 1730
Step-by-step explanation:
subtract 270 from 2000
Please help me on the problems below and show work
The correct form of the equation can be written as y = 35/6 x + 2
How do we rewrite the equation?
We have to know that the equation have been given to us in the point that we have as; y - 5/7 = 5x - 6/6. We would then have to multiply both sides with the LCM of the equations and then we have that;
42(y - 5/7) = 42(5x - 6)/6
6(y - 5) = 7(5x - 6)
6y - 30 = 35x - 42
Collecting the like terms we have that;
6y - 35 x = -42 + 30
6y - 35x = -12
6y = 35x + 12
y = 35/6 x + 12/6
y = 35/6 x + 2
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20 POINTS PLEASE ANSWER QUICK
Solve the equation —1/6(12 + 18t) = 13 for t
Answer: t=-5
Step-by-step explanation:
Multiply by -6 on both sides to get rid of the -1/6
Subtract 12 on both sides
Divide 18 by -90 on the other side
[tex](-1/6(12+18t))(-6)=13(-6)\\12+18t=-78\\18t=-90\\\\t=-5[/tex]
The lateral height of a cone is 8 inches and the area of the base of the cone is 49π in². It requires 2.5 minutes to paint the cone.
The area of the base is doubled.
How long will it take to paint this cone if it can be painted at the same rate? Use π≈3.14.
Enter your answer, rounded to the nearest tenth, in the box.
The time required to paint the cone when the base area is doubled is determined as 5.0 minutes.
How will it take to paint the cone when the area of the base doubles?
The amount of time requires to paint the entire cone when the area of the base of the cone is doubled is calculated using simple proportion as shown below;
time
Area of base of cone = 49π in². -----------------------> 2.5 minutes
Area of base of cone = 2 (49π in² ) -------------------> ?
49 x = ( 2 x 49 x 2.5 )
x = 2 x 2.5 min
x = 5.0 minutes
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Divide. (40c3+20c2−36c)÷(4c)
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The value of the given number after division is 10c² + 5c - 9.
What is division?Repetitive subtraction is the process of division. It is the multiplication operation's opposite. It is described as the process of creating equitable groups. When dividing numbers, we divide a larger number down into smaller ones such that the larger number obtained will be equal to the multiplication of the smaller numbers.
Given to divide (40c³ +20c² −36c) ÷ (4c)
dividing each term separately,
40c³/4c + 20c²/4c - 36c/4c
dividing constant by constant and variables by variable,
10c² + 5c - 9
Hence the division is 10c² + 5c - 9.
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Which point is a solution of the system of linear equations? x − 3y = −2 y = −3x + 4 (1, 1) (1, −1) (−1, 1) (−1, −1)
Answer:
working on a answer one second
Step-by-step explanation:
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The measure of angle ADC in the geometric system is equal to 55°.
How to determine the value of an angle related to a geometric system
In this question we find a geometric system formed by a quadrilateral and an angle vertical to a vertex of the quadrilateral. Angle CDE is supplementary to angles EDF and ADC. Two angles are supplementary whose sum of measures equals 180°. Therefore:
m ∠ CDE + m ∠ EDF = 180°
(2 · x + 1) + (x - 7) = 180°
3 · x - 6 = 180°
3 · x = 186°
x = 62
m ∠ CDE = 2 · x + 1
m ∠ CDE = 2 · 62 + 1
m ∠ CDE = 125°
m ∠ ADC = 180° - 125°
m ∠ ADC = 55°
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Write in the missing angle measures of WXYZ and then find the sum of the interior angles.
Answer:
X = 50
Z = 50
W = 130
Y = 130
Sum of Interior Angles: 360 degrees
Step-by-step explanation:
We can infer from the diagram, X = 50, therefore Z must be as well. W is congruent to Y, so 260 / 2 = 130. Quadrilateral is equal to 360 degrees.
Find the perimeter of the figure to the right.
Answer: [tex]11a+16[/tex] feet
Step-by-step explanation:
The perimeter is equal to the sum of the lengths of the sides.
[tex]2a+2a+2a+8+5a+8=11a+16[/tex]
From a group of eight people, two individuals are to be selected at random. How many selections are possible?
Answer:
28 different selections
Step-by-step explanation:
The number of ways in which k items can be drawn from a larger sample of n items is given by:
[tex]nC_k\;[/tex] pronounced as "n choose k" relates to a class of problems known as combinatorics
[tex]nC_k\;[/tex] is given by the formula
[tex]nC_k\; =\dfrac{n!}{k!(n-k)!}[/tex]
where ! stands for the factorial of a number
n! = n x (n-1) x ...... x 3 x 2 x 1
Plugging values of n and k into the equation we get
[tex]8C_2\; =\dfrac{8!}{2!(8-2)!} = \dfrac{8!}{2!\;6!}[/tex]
We can rewrite 8! as 8 x 7 x 6!
So
[tex]8C_2\; =\dfrac{8\cdot 7 \cdot 6!}{2!\; 6!} = \dfrac{8 \cdot 7}{2 \cdot 1} = \dfrac{56}{2} = 28[/tex]
Use the definition of continuity and the properties of limits to show that the function
is continuous at x = -2.
The given function
F(x) = √(8 - x²)/ (2x² - 5)
is continuous at x = -2,
What is continuity ?In mathematics, The function is called as continuous at the particular value of x, if right hand limit, left hand limit and the value of function at x all are equal.
RHL = LHL = F(x)
Limit exist and continuous
Given that,
F(x) = √(8 - x²)/ (2x² - 5)
To check whether it is continuous at x = -2
First taking LHL,
[tex]\lim_{h \to \00}[/tex] √[8 - ( -2 -0)²]/ [2(-2-0)² - 5]
⇒ √4/(8-5)
⇒ 2/3
Now, taking RHL
[tex]\lim_{h \to \00}[/tex] √[8 - ( -2 +0)²]/ [2(-2+0)² - 5]
⇒ √4/(8-5)
⇒ 2/3
The value at x = -2
F(3) = √[8 - ( -2 +0)²]/ [2(-2+0)² - 5]
⇒ √4/(8-5)
⇒ 2/3
RHL = LHL = F(-2)
Hence Proved, the function is continuous at x = -2
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