Answer:
Choice A.
Explanation:
The length of a rectangle is 5m less than three times the width, and the area of the rectangle is 50m^(2). Find the dimensions of the rectangle
Answer:
The width is 5m and the length is 10m.
Step-by-step explanation:
Rectangle:
Has two dimensions: Width(w) and length(l).
It's area is:
\(A = w*l\)
The length of a rectangle is 5m less than three times the width
This means that \(l = 3w - 5\)
The area of the rectangle is 50m^(2)
This means that \(A = 50\). So
\(A = w*l\)
\(50 = w*(3w - 5)\)
\(3w^{2} - 5w - 50 = 0\)
Solving a quadratic equation:
Given a second order polynomial expressed by the following equation:
\(ax^{2} + bx + c, a\neq0\).
This polynomial has roots \(x_{1}, x_{2}\) such that \(ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})\), given by the following formulas:
\(x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}\)
\(x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}\)
\(\bigtriangleup = b^{2} - 4ac\)
In this question:
\(3w^{2} - 5w - 50 = 0\)
So
\(a = 3, b = -5, c = -50\)
\(\bigtriangleup = (-5)^{2} - 4*3*(-50) = 625\)
\(w_{1} = \frac{-(-5) + \sqrt{625}}{2*3} = 5\)
\(w_{2} = \frac{-(-5) - \sqrt{625}}{2*3} = -3.33\)
Dimension must be positive result, so
The width is 5m(in meters because the area is in square meters).
Length:
\(l = 3w - 5 = 3*5 - 5 = 10\)
The length is 10 meters
Which equation represents a line which is parallel to the line y = -x - 7?
Answer:
whichever one also says -x
Step-by-step explanation:
parallel lines have the same slope
Consider the equation: f(x) = 4/x-3 + 2 Please explain where the vertical asymptote would be algebraically and graphically. Why are asymptotes important when explaining the graph of a rational function? What are the horizontal and vertical shifts from this function compared to the parent function, and how do you know?
Asymptotes are important when explaining the graph of a rational function because they show the behavior of the function as x approaches certain values.
What are asymptotesA vertical asymptote of a function occurs when the function approaches infinity or negative infinity as the input (x) approaches a certain value. In this case, the function f(x) = 4/(x-3) + 2 has a vertical asymptote at x = 3, because as x approaches 3, the denominator of the fraction (x-3) approaches zero and the function becomes infinitely large. Graphically, the vertical asymptote appears as a line on the x-axis where the function does not approach, but never touches.
Asymptotes are important when explaining the graph of a rational function because they show the behavior of the function as x approaches certain values. This helps us understand how the function behaves in different parts of the graph.
Horizontal shift is the movement of the graph to the left or right. The horizontal shift of this function is none, as the parent function is f(x) = 4/(x) + 2.
Vertical shift is the movement of the graph up or down. The vertical shift of this function is 2 units up, as the parent function is f(x) = 4/(x) + 2.
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You are planning on applying to the Knirhsdaeh institute as a psychology counselor. They hire millions of psychologists around the world. You know the standard deviation for the salaries is $13 k. To find the average, you sample 23 random employees and get an average salary of $81 k. Find an 98% confidence interval for the true average salary of Knirhsdaeh employees.
Answer:
The 98% of the confidence interval for the true average salary of Knirhsdaeh employees as a psychology counselor
(75.4206, 86.5794)
Step-by-step explanation:
Step(i):-
Given that the mean of the sample = $81 k
Given that the size of the sample 'n' = 23
Given that the standard deviation for the salaries is $13 k
Step(ii):-
98% of the confidence interval for the true average salary of Knirhsdaeh employees is determined by
\((x^{-} - t_{0.02} \frac{S.D}{\sqrt{n} } , x^{-} + t_{0.02} \frac{S.D}{\sqrt{n} })\)
Degrees of freedom = n-1 = 23-1 =22
\(t_{0.02} = 2.5083\)
\((81 - 2.0583 \frac{13}{\sqrt{23} } , 81 + 2.0583 \frac{13}{\sqrt{23} } )\)
( 81 - 5.57940 , 81 + 5.57940)
(75.4206, 86.5794)
Final answer:-
The 98% of the confidence interval for the true average salary of Knirhsdaeh employees as a psychology counselor
(75.4206, 86.5794)
the roots of the polynomial\[x^3 - 52x^2 581x - k\]are distinct prime numbers. find $k.$ your first answer: 12
The roots of the given polynomial x³ - 52x² + 581x - k are distinct prime numbers represents that value of k is equal to 602.
Let p, q, and r be the three distinct prime roots of the polynomial,
x³ - 52x² + 581x - k.
By Vieta's formulas, we know that,
p + q + r = 52
pq + qr + rp = 581
pqr = k
Use the fact that p, q, and r are prime numbers to simplify the problem.
Since 581 is an odd number,
One of the primes must be 2.
Assume that p = 2.
Then we have,
q + r = 50
2q + 2r + qr = 581
2qr = k
Solving the first equation for q, we get q = 50 - r.
Substituting this into the second equation, we get,
2(50 - r) + 2r + 2r(50 - r) = 581
⇒ 100 - 2r + 2r + 100r - 2r² = 581
⇒ 2r² - 100r + 481 = 0
Using the quadratic formula, solve for r,
r = (-b ± √(b² - 4ac)) / (2a)
here,
a = 2, b = -100, and c = 481
Substitute the value we get,
r = (-(-100) ± √((-100)² - 4(2)(481))) / (2(2))
⇒ r = (100 ± √(10000 - 3848)) / 4
r = (100 ± √6152) / 4
r ≈ 44.6 or r ≈ 5.4
q and r must be a prime number,
Consider
r = 7 and q = 43.
or r = 43 and q = 7
This implies,
k
= pqr
= (2)(7)(43)
= 602
Therefore, from the roots of the polynomial the value of k is 602.
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The above question is incomplete, the complete question is:
The roots of the polynomial x³ -52x² + 581x - k are distinct prime numbers. find k.
Please answer all of them on both pages please I need this today
4.) The statement that is not true about the cube box is that the volume of the box is one square foot. That is option C.
5.) All the possible dimensions of the bottom layers include the following;
when length= 4 units; width = 3units
when length = 3 units; width = 4 units
when length = 2 units; width = 6 units
How to calculate the volume of a cube?To calculate the volume of a cube box the formula that should be used = a³
where a = 1³
volume = (1×1×1) = 1ft³
The area of the cube = 6(a²)
But a = 1
area = 6(1²)
= 6ft²
Therefore the wrong statement is that the volume of the box is one square foot instead of 1ft³.
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How many radians is 100°?
Answer:
1.74533
Step-by-step explanation:
As part of the training for the cross-country team, you must run a total of 20 miles per week. You ran 5.6 miles in the first two days of the week. If you run the same amount each day for the remaining five days, how many miles must you run per day to complete the 20 miles?
Write and solve an equation to determine the number of miles, m, you must run per day.
5m + 2(5.6) = 20; m = 1.76
5m + 5.6 = 20; m = 2.88
5m − 5.6 = 20; m = 5.12
m + 5(5.6) = 20; m = 8
pls help
The equation to determine the number of miles, m, you must run per day is B. 5m + 5.6 = 20; m = 2.88
How to illustrate the equation?An equation is the statement that illustrates the variables given. In this case, two or more components are taken into consideration to describe the scenario. An equation is not the same as a mathematical expression. The equal (=) operator is always used to join two mathematical expressions in an equation.
In mathematics, an equation is a relationship between two expressions that is expressed as an equality on either side of the equal to sign. An equation would be 3y = 16, for instance. Equations can be categorized into one of the following three categories depending on their degree:
linear formulaquadratic formulaCubic problemIn this scenario, the person must run a total of 20 miles per week and ran 5.6 miles in the first two days of the week.
Let the number of miles for the remaining 5 days be m.
This will be:
5m + 5.6 = 20;
Solving for m = will give 2.88.
In conclusion, the correct option is B.
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Martin just turned 25. For his birthday, he'd like to invest $3,000 into a bond that
earns 7% interest. How many times will Martin's investment double before he
withdraws it at the age of 70?
Answer:
Step-by-step explanation:
Determine whether the arc is a minor arc, a major arc, or a semicircle of R. Questions 25 nd 27
We can find the missing angles using the drawing below.
Then,
\(\begin{gathered} 360=60+60+55+x+y \\ \text{and} \\ 55+y=x \\ \Rightarrow240=2(55+y) \\ \Rightarrow120=55+y \\ \Rightarrow y=65 \\ \Rightarrow x=120 \end{gathered}\)Therefore
25)
Arc JML covers an angle equal to 65+55+60=180; thus, ArcJML is a semicircle of R.
27)
Find the measure of angle x in the figure below
45
55
45°
O 80
55
100
Answer:
80°
Step-by-step explanation:
sides of angle =180°
y= 180-(45+55) = 80°
x=y because x is vertically opposite to y
therefore x =80°
I need to know the percentage of drivers who are at least 45. Using the table in the picture.
The percentage of drivers who are at least 45 is 62%
How to determine the percentage of drivers who are at least 45.From the question, we have the following parameters that can be used in our computation:
The table of values
From the table, we have
Age 45 = 62 percentile
When represented properly
So, we have
Age 45 = 62%
This means that the percentage of drivers who are at least 45 is 62%
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Let A = { 0 , 2 , 4 , 6 } , B = { 1 , 2 , 3 , 4 , 5 } , and C = { 1 , 3 , 5 , 7 } . Find { x ∣ x ∈ B or x ∈ C } .
Answer:
{1, 2, 3, 4, 5, 7}
Step-by-step explanation:
x in B or C is ...
B ∪ C = {1, 2, 3, 4, 5, 7}
In 2012, the population of Cincinnati, Ohio, was 296,550 with a population density of approximately 3800 people per square mile. What is the approximate land area of Cincinnati in square miles to the nearest whole number?
Answer:
≈ 78mi^2
Step-by-step explanation:
To find approximate land area:
296,550/3,800 = 78.039
Round to nearest whole number:
Area = 78
Write the equation of the line:
(1,-7); slope =-1
Answer:
y=-1x-6
Step-by-step explanation:
the slope is -1
use y=mx+b
Plug the point into y=mx+b, -7=-1(1)+b
-7=-1+b
add 1 both sides the y- intercept is b=-6
Match the following graph with the name of the graph
Absolute value: C
Quadratic: D
Constant: A
Square root: E
Linear: B
There are the equations for the graphs on the bottom:
y=2 is constant because the y value never changes
y=x is linear because the y value changes at a constant rate
y= |x| is absolute value because |x| is the absolute value of x
y=x^2 is quadratic because quadratic functions have a degree of 2
y=sqrt(x) is a square root because y= square root of x
the answer for these questions
The triangles are similar by SSS congruence of triangles.
What is SSS congruence of triangles?
The two triangles are congruent if the three sides of one triangle are the same as the corresponding three sides (SSS) of the other triangle.
We are given two triangle ABC and PQR.
In order to see whether these are similar or not, we will use the SSS congruence of triangles.
The ratio of sides are:
⇒AB : PQ = 8 : 6
⇒AB : PQ = 4 : 3
Similarly,
⇒BC : QR = 12 : 9
⇒BC : QR = 4 : 3
Similarly,
⇒AC : PR = 12 : 9
⇒AC : PR = 4 : 3
Since, the ratio of all the sides is same so, the triangles are similar.
Hence, the triangles are similar by SSS congruence of triangles.
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Since, there are multiple questions so, the question answered above is attached below
7. Which of the following illustrates the commutative property of multiplication?
(1) 5(2x) =(5-2)x
(2) 4(2x+5) = 4 - 2x+4-5
(3) x2 +5=5+x2
(4) 2x -3x = 2-3-X-X
show work pleasee
look at the image to see the answer
someoneplz help me plzzzzzzzzzzzz
Answer:
Whats the question ???
Step-by-step explanation:
What do you need help with?
SOMEONE PLEASE ANSWER. I'M CRYING AND DONT KNOW WHAT TO DO! I NEED YOUR HELP PLEASE!
A cafeteria serves lemonade that is made from a powdered drink mix. There is a proportional relationship between the number of scoops of powdered drink mix and the amount of water needed to make it. For every 2 scoops of mix, one half gallon of water is needed, and for every 5 scoops of mix, one and one fourth gallons of water are needed. Part A: Find the constant of proportionality. Show every step of your work. Part B: Write an equation that represents the relationship. Show every step of your work. Part C: Describe how you would graph the relationship. Use complete sentences. Part D: How many gallons of water are needed for 12 scoops of drink mix?
Below, you'll find a list of all the answers to the questions which are solved by using proportional relationship.
What is the fundamental formula for a straight line?The general equation for a straight line is y=mx + c, where m represents the line's slope and expresses the rate of change of y per unit time with respect to x.
The point where the graph crosses the y-axis is called the y-intercept, or c.
Direct proportionality is also represented by y = mx. We can express m as follows: m = y/x
OR
y₁/x₁ = y₂/x₂
In our cafeteria, lemonade is made using a powdered drink mix. The quantity of water required to manufacture a certain amount of powdered drink mix is proportional to the number of scoops required. For every 2 scoops of mix, 1/2 gallon of water is required, and for every 5 scoops,
1 1/4 gallons of water are required.
The proportional formula is written as y = k x.
Using the information provided, we can now write: 2 scoops require 0.5 gallon of water.
1.25 gallon of water is required for 6 scoops.
This means that k = 2/0.5
k = 2/(1/2)
k = 2 x 2
k= 4
Equations describing the relationship can be expressed as y = 4x + c.
0.5 gallon of water is now required for 2 scoops.
2=4(1/2)+c
2=2+c
c=0
Therefore, the formula will be y = 4x.
The end includes a graph for y = 4x.
12 scoops of water:
12=4x
x=3 gallons of water is needed.
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What is the image of the point (6,-4) after a rotation of 90 degrees counterclockwise about the origin?
Answer: (4, 6)
Step-by-step explanation:
You change the numbers places (x to y and y to x) while switching the sign of the original y value.
Irina drove 400 miles in 8 hours. Albert drove 600 miles in 10 hours.
Use the drop-down menus to compare the average speeds for Irina and Albert
Irina's rate is Choose
miles per hour Choose than Albert's rate.
Choose...
5
10
100
200
Answer:
Irina drive 200 miles slower than Alberts rate
Step-by-step explanation:
10=8x^2+2x in standard form with the steps
Answer:
8x=10
Step-by-step explanation:
hope helps
Which linear function has the same y-intercept as the one that is represented by the graph?
On a coordinate plane, a line goes through points (3, 4) and (5, 0).
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 3, negative 1, 1, 3. Column 2 is labeled y with entries negative 4, 2, 8, 14.
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 4, negative 2, 2, 4. Column 2 is labeled y with entries negative 26, negative 18, negative 2, 6.
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 5, negative 3, 3, 5. Column 2 is labeled y with entries negative 15, negative 11, 1, 5.
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 6, negative 4, 4, 6. Column 2 is lab
eled y with entries negative 26, negative 14, 34, 46.
The linear function that has the same y-intercept as the given graph is the equation y = -2x + 10, corresponding to option 3.
To determine the linear function with the same y-intercept as the graph, we need to find the equation of the line passing through the points (3, 4) and (5, 0).
First, let's find the slope of the line using the formula:
slope (m) = (change in y) / (change in x)
m = (0 - 4) / (5 - 3)
m = -4 / 2
m = -2
Now that we have the slope, we can use the point-slope form of a linear equation to find the equation of the line:
y - y1 = m(x - x1)
Using the point (3, 4) as our reference point, we have:
y - 4 = -2(x - 3)
Expanding the equation:
y - 4 = -2x + 6
Simplifying:
y = -2x + 10
Now, let's check the given options to find the linear function with the same y-intercept:
Option 1: The table with x-values (-3, -1, 1, 3) and y-values (-4, 2, 8, 14)
The y-intercept is not the same as the given line. So, this option is not correct.
Option 2: The table with x-values (-4, -2, 2, 4) and y-values (-26, -18, -2, 6)
The y-intercept is not the same as the given line. So, this option is not correct.
Option 3: The table with x-values (-5, -3, 3, 5) and y-values (-15, -11, 1, 5)
The y-intercept is the same as the given line (10). So, this option is correct.
Option 4: The table with x-values (-6, -4, 4, 6) and y-values (-26, -14, 34, 46)
The y-intercept is not the same as the given line. So, this option is not correct.
Therefore, the linear function that has the same y-intercept as the given graph is the equation y = -2x + 10, corresponding to option 3.
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Joseph buys a gallon of milk every 6th day and a box of cereal every 8th day. He bought both items today. In how many days will he buy both items together again?
Answer:
24 days
Step-by-step explanation:
Milk: 6, 12, 18, 24, 30
Cereal: 8, 16, 24
You can see that 24 matches up with both cycle.
Solve the following triangle completely.
(a). in triangle ABC, B = 25.6° C = 124.4° C= 39.2m
(b) B = 101.15°, b= 17.23cm and C= 10.86cm.
Answer:
The answers is below in bold.
Step-by-step explanation:
(a) A = 180 - 25.6 - 124.4 = 30 degrees.
Next use the Sine Rule:
b / sin B = c / sin C
b / sin 25.6 = 39.2/sin 124.4
b = (39.2 * sin 25.6) / sin 124.4
b = 20.53 m.
Also
a / sin A = c / sin C
a / sin 30 = 39.2 / sin 124.4
a = (39.2 * sin 30 / sin 124.4
a = 23.75 m.
b). This is solved in a similar way to (a).
First find angle C using the sine rule.
Then you will know angle A from the 180 degree Rule.
Then you can find the length of a using the Sine Rule.
Luther started collecting lunch boxes when he was 5 years old. He had 12 superhero lunch boxes, 19 outer space lunch boxes, and 26 rock band lunch boxes.Then Luther's cousin started her own lunch box collection. Luther wanted to help her get started, so he gave his cousin 17 lunch boxes from his collection. How many lunch boxes does Luther have left in his collection?
Solution
For this case we have the following lunch boxes
12 from superhero
19 from outer space
26 from rock bands
A total of: 12+19+26= 57 lunch boxes
And he gave to his cousin 17 lunch boxes so then the remaining are:
57-17= 40 lunch boxes
King of Diamonds Industries has bonds on the market making annual payments, with 14 years to maturity, and selling for R1 482,01. At this price, the bonds yield 7%. What is the coupon rate?
The coupon rate of the bonds by King of Diamonds Industries would be 7 %.
How to find the coupon rate ?The formula for the bond price shows the coupon payment and so can be used to find the coupon rate:
= (Coupon payment x ( 1 - ( 1 + r ) ^ ( - number of years till maturity ) ) ) / r + Face value / (1 + rate )^ number of years
1,482.01 = (C x (1 - (1 + 0.07 )^ (- 14) ) ) / 0.07 + F / (1 + 0.07 ) ^ 14
103.7407 - 0.07 x (F / (1 + 0.07) ^14 ) = C x (1 - ( 1 + 0.07) ^ ( - 14) )
Using a calculator, C is $ 70.
This means that the coupon rate is:
= 70 / 1, 000
= 7 %
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Consider this argument: Bob is 13 feet tall So, Bob is taller than most other people Suppose there are no implicit premises: this is the whole argument. Which of the following is true about this argument? A. The premise entails the conclusion because, if the premise is true, the conclusion has to be true B. The premise does not entail the conclusion because, if the premise is true, the conclusion could still be false (setting aside facts not supplied by the premise)
с. The premise entails the conclusion because, setting aside facts not supplied by the premise, there is no way the premise could be true and the conclusion false. D. The premise does not entail the conclusion because it has no suppositional strength.
The correct statement is Option - B →
The premise does not entail the conclusion because, if the premise is true, the conclusion could still be false.
What is argument in mathematics?A mathematical argument is a sequence of statements and reasons given with the aim of demonstrating that a claim is true or false.
Given is that Bob is 13 feet tall. So, Bob is taller than most other people.
The correct statement is -
The premise does not entail the conclusion because, if the premise is true, the conclusion could still be false.
Therefore, the correct statement is Option - B →
The premise does not entail the conclusion because, if the premise is true, the conclusion could still be false.
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