Answer: The given expression can be factorized as (2k - 3)(k² - 1) using the difference between squares.
Step-by-step explanation: To factorize the given expression using the difference between squares, we need to identify terms that can be written as the square of some other term.
We can rewrite the expression as:
(2k³ - 3k²) - (2k - 3)
Now, we can factor out the common terms from each bracket:
k²(2k - 3) - 1(2k - 3)
We can see that both brackets have a common factor of (2k - 3), which we can factor out:
(2k - 3)(k² - 1)
Therefore, the given expression can be factorized as (2k - 3)(k² - 1) using the difference between squares.
Please help! Easy math problem! 15 pts!!!!
Answer:
90
Step-by-step explanation:
To find how many 18-inch pieces of ribbon there are in 1620 inches, simply divide 1620 by 18.
1620/18 = 90
For the original question, we know that each roll of ribbon is 9 feet long. To convert to inches, multiply 9 by 12.
9*12 = 108
Now, to find how many 18-inch pieces of ribbon there are in 108 inches, divide 108 by 18.
108/18 = 6
Since we have 15 rolls of ribbon, multiply 6 by 15.
6*15 = 90
∴ The dressmaker can cut ninety 18-inch pieces from 15 rolls or ribbon.
Refer to image trigonometry
The trigonometric relation is solved and the unit circle is plotted
Given data ,
Let the unit circle be represented as A and B
Now , in figure A , we get
The radius of the circle is r = 5 units
And the point on the circle is P ( 5 , 5 )
So , the height of unit circle is h = 5 units
Now , the hypotenuse of the circle is = 2√5 units
From the trigonometric relation , we get
sin θ = opposite / hypotenuse
sin z = √5 / 2√5
sin z = 1/2
Taking inverse on both sides , we get
z = 30°
So , the measure of rotation is 60° counterclockwise
In figure B , we get
The radius of the circle is r = 5 units
And the point on the circle is P ( 5 , -5 )
So , the height of unit circle is h = -5 units
Now , the hypotenuse of the circle is = 2√5 units
From the trigonometric relation , we get
sin θ = opposite / hypotenuse
sin z = √5 / 2√5
sin z = -1/2
Taking inverse on both sides , we get
z = -30°
So , the measure of rotation is 30° clockwise
Hence , the trigonometric relation is solved
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Calcular la fuerza con la que es
lanzada una pelota de beisbol de
0.126 kilogramos a una aceleración
de 3 m/s
La fuerza con la que es lanzada una pelota de béisbol puede calcularse utilizando la segunda ley de Newton, que establece que la fuerza (F) es igual a la masa (m) multiplicada por la aceleración (a). En este caso, la masa de la pelota es de 0.126 kilogramos y la aceleración es de 3 m/s.
Aplicando la fórmula, la fuerza (F) se calcula de la siguiente manera:
F = m * a
F = 0.126 kg * 3 m/s
F = 0.378 N
Por lo tanto, la fuerza con la que se lanza la pelota de béisbol es de aproximadamente 0.378 Newtons.
Es importante tener en cuenta que este cálculo asume que la aceleración proporcionada es constante y que no hay otras fuerzas que actúen sobre la pelota durante el lanzamiento, como la resistencia del aire. Estas consideraciones pueden afectar la fuerza real experimentada por la pelota en un escenario práctico.
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16 m
17 m
17 m
Find the area
The area of isoceles triangle is 120 square meters
Let us assume that a and c represents the equal sides of isosceles triangle and b represents the base of isosceles triangle such that a = 17 m, b = 16 m and c = 17 m
Let us assume that h represents the height of isosceles triangle.
We know that the formula for the height of isosceles triangle.
h = [tex]\sqrt{a^2-\frac{b^2}{4} }[/tex]
h = [tex]\sqrt{17^2-\frac{16^2}{4} }[/tex]
h = √(225)
h = 15 m
Using the formula for the area of isosceles triangle,
A = 1/2 × base × height
A = 1/2 × b × h
A = 1/2 × 16 × 15
A = 120 sq. m.
Therefore, the required area is 120 sq. m.
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The complete question is:
The sides of isosceles triangle triangle are: 17 m, 17 m and 16 m
Find the area of the isoceles triangle. The area is square meters.
if ha is not equals, you have to double the probability of being beyond your test statistic to get your p-value.
a. true
b. false
Show that the product of two consecutive odd natural numbers is always an odd number. please with clear explanation dont give any links or wrong answers please.....
The population p(t) of a culture of bacterium pseudomonas aeruginosa is given by p(t)=-1715t^2+85,000t+10,000, where t is the time in hours since the culture was started.
Therefore, the population is at a maximum approximately 25 hours after the culture was started.
What is function?A function is a mathematical concept that describes a relationship between two sets of values, called the domain and the range. It is a rule or a set of rules that assigns a unique output value for every input value in the domain. In other words, it is a process that takes one or more inputs and produces a corresponding output. Functions are commonly represented using equations, graphs, or tables. They are used in various branches of mathematics, science, engineering, and technology to model real-world phenomena, make predictions, and solve problems.
Here,
To find the time at which the population is at a maximum, we need to find the time when the rate of change of population, or the derivative of p(t), is zero.
p(t) = -1715t² + 85,000t + 10,000
p'(t) = -3430t + 85,000
Setting p'(t) = 0, we get:
-3430t + 85,000 = 0
Solving for t, we get:
t = 24.85
Rounding to the nearest hour, we get:
t ≈ 25
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help please ive never learned stem and leaf plot before
Answer: D
Step-by-step explanation:
The left side of a stem-leaf plot is the first part of the number and the right sides are the leaves. so list of numbers for city 1 is:
8, 11, 15, 17, 18, 23, 32, 35, 40, 54, 58, 59
median is the middle number and range is if you subracted the first and last numbers.
A. is out The medians are not the same
B. is out The median for City 2 is greater
C. is out. The ranges are not the same
D. is correct. Range for city 1 is: 59-8=51 Range for city 2 is: 61-31=30
the glass for a picture window is 8 feet wide the door it must pass through is 3 feet wide how tall must the door be for the glass to pass through the door
Answer:
The glass cannot fit through the door.
Step-by-step explanation:
We can use the Pythagorean theorem to solve this problem. Let the height of the door be h.
We know that the diagonal of the glass must be able to fit through the door, so we can set up the following equation:
sqrt(8^2 + h^2) <= 3
Squaring both sides of the inequality, we get:
64 + h^2 <= 9
Subtracting 64 from both sides, we get:
h^2 <= -55
Since a square of a real number cannot be negative, there is no solution to this inequality.
Therefore, the glass cannot fit through the door, regardless of the height of the door.
The door must be at least √55 feet tall, which is approximately 7.42 feet, for the 8-foot wide glass to pass through the 3-foot wide door.
To determine how tall the door must be for the glass to pass through, we first need to calculate the height of the glass. Unfortunately, the height of the glass is not provided in the question. Assuming that the height of the glass is less than or equal to the height of the door, we can proceed as follows:
Let's say the height of the glass is h feet. Then, we know that the glass is a rectangular shape with dimensions of 8 feet by h feet. To pass through the door, the glass needs to be able to fit horizontally and vertically through the opening.
Since the door is 3 feet wide, the glass needs to be able to fit through the opening when turned on its side. Therefore, the height of the glass cannot exceed 3 feet.
So, the door must be at least 3 feet tall for the glass to pass through. However, this assumes that the height of the glass is less than or equal to 3 feet. If the height of the glass is greater than 3 feet, then the door would need to be taller to accommodate the glass.
To determine the minimum height the door must be for the 8-foot wide glass to pass through the 3-foot wide door, you can use the Pythagorean theorem. The glass will need to be tilted diagonally as it passes through the door. Let's label the door's height as 'h' and use the formula:
3² + h² = 8²
9 + h² = 64
h² = 64 - 9
h² = 55
h = √55
The door must be at least √55 feet tall, which is approximately 7.42 feet, for the 8-foot wide glass to pass through the 3-foot wide door.
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Suppose that the local government of Raleigh decides to institute a tax on cider consumers. Before the tax, 55 billion cases of cider were sold every year at a price of $11 per case. After the tax, 50 billion cases of cider are sold every year; consumers pay $15 per case (including the tax), and producers receive $9 per case. The amount of the tax on a case of cider is ___ per case. Of this amount, the burden that falls on consumers is ___ per case, and the burden that falls on producers is ___ per case. True or False: The effect of the tax on the quantity sold would have been smaller if the tax had been levied on producers. True
False
If the tax had been levied on producers instead of consumers, the effect on the quantity sold would have been smaller is True. The amount of tax on a case of cider is $4. Of this amount, the burden that falls on consumers is $3 per case, and the burden that falls on producers is $1 per case.
This is because producers would have had to bear the full burden of the tax, reducing their incentive to produce and sell cider. To calculate the tax burden on consumers, we can subtract the price per case before the tax ($11) from the price after the tax ($15), which equals $4. Then, we subtract the amount of the tax that falls on producers ($1) to get the amount of the tax burden on consumers ($3).
To calculate the tax burden on producers, we can subtract the amount they receive per case after the tax ($9) from the price per case before the tax ($11), which equals $2. This $2 is split between the producers and the government, with the producers bearing $1 of the burden.
This could result in a decrease in the supply of cider, leading to higher prices and less demand from consumers. By taxing consumers instead, the government can still collect revenue from the tax while minimizing the impact on the supply and demand of cider in the market.
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or
This graph shows how the total length Francesca has knit depends on the number of nights she has spent knitting.
y
x
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
0
Length knit (centimeters)
Nights
Total length knit
What is the rate of change?
Write your answer as a decimal or integer.
centimeters per night
The constant of variation for the case is 2 centimeters per night.
What is a graph with examples?A graph is a non-linear kind of data structure made up of nodes or vertices and edges. The edges connect any two nodes in the graph, and the nodes are also known as vertices. This graph has a set of vertices V= { 1,2,3,4,5} and a set of edges E= { (1,2),(1,3),(2,3),(2,4),(2,5),(3,5),(4,50 }.
The graph shown in the problem has length as the vertical axis and nights as the horizontal axis.
The points through which the straight line passes are (0, 0) and (10, 20).
The equation of the line can be written as follows,
=> [tex]\frac{y-0}{x-0}=\frac{20-0}{10-0}[/tex]
=> [tex]\frac{y}{x}=\frac{20}{10}[/tex]
=> y = 2x
Thus, the above equation implies that y and x are proportional and 2 is constant of variation.
Hence, the constant of variation for the given case is 2 centimeters per night.
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The given question is incomplete, So i take the similar question:
This graph shows how the total length Kimi has knit depends on the number of nights she has spent knitting.
What is the constant of variation?
____ centimeters per night
What is the length of a diagonal of a cube with a side length of 10 cm?
/200 cm
√210 cm
√300 cm
√320 cm
O
5. The following table shows the number of students in a given class according to their age and sex. Age Sex Male Female 18 What percent of class are 13 years old? 13 15 Total 21 27
The percentage of the class that are 13 years old can be found to be 43.75%
We have,
Number of 13 year olds = 21
Number of 15 year olds = 27
So, Total students
= Number of 13 year olds + Number of 15 year olds
= 21 + 27
= 48 students
and, the percentage of students who are aged 13 is
= 21 / 48 x 100 %
= 0. 4375 x 100 %
= 43. 75 %
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What is the mean of this data set?
The mean of this data set is ³/₅ inches as a fraction in simple form.
What is the mean?The mean refers to the average of the data set.
The average can be determined as the quotient of the total data value divided by the number of items in the data set.
The length of the first piece of ribbon = ¹/₄ inches
The length of the second piece of ribbon = 1¹/₃ inches
The length of the third piece of ribbon = ²/₃ inches
The length of the fourth piece of ribbon = ¹/₄ inches
The length of the fifth piece of ribbon = ¹/₂ inches
The total length of the five pieces of ribbon = 3 inches
The mean = ³/₅ inches (3 ÷ 5)
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The diameter of a circle is 7 cm. Find its area to the nearest whole number.
Since the diameter of this circle is 7 cm, its area to the nearest whole number include the following: 39 square centimeters.
How to calculate the area of a circle?In Mathematics and Geometry, the area of a circle can be calculated by using this formula:
Area = πr²
Where:
r represents the radius of a circle.
Note: Radius = diameter/2 = 7/2 = 3.5 centimeters.
By substituting the radius into the formula for the area of a circle, we have the following;
Area of circle = 3.142 × 3.5²
Area of circle = 38.5 ≈ 39 square centimeters.
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15. answer questions based on graph
A Trip By Car
O
0
20
1. During which segment did the car come to a complete stop?
2. During which segment did the car travel back toward its starting position?
3. During which segment did the car travel the fastest?
4. During which segment did the car travel at an average speed of 12 km/hr
a. segment B to C
b. segment C to D
c. segment D to E
d. segment A to B
Answer:
The car came to a complete stop during segment C to D, because the distance did not change over time.
The car traveled back toward its starting position during segment D to E, because the distance decreased over time.
The car traveled the fastest during segment B to C, because the slope of the graph was the steepest.
The car traveled at an average speed of 12 km/hr during segment A to B, because the slope of the graph was 12 km/hr.
Step-by-step explanation:
a hiker in africa discovers a skull that contains 32% of its original amount of c 14 find the age of the skull to the nearest year
Answer:
The half-life of carbon-14 is 5,730 years. This means that every 5,730 years, half of the carbon-14 in a sample will decay. So, if a sample contains 32% of its original amount of carbon-14, it is about 2 * 5,730 = 11,460 years old.
However, it is essential to note that radiocarbon dating is not an exact science. There is a margin of error of about 20 years. So, the skull's actual age could be between 11,260 and 11,660 years old.
Here is a formula that can be used to calculate the age of a sample using radiocarbon dating:
```
Age = (5,730 * ln(A/Ao)) / ln(2)
```
Where:
* Age is the age of the sample in years
* A is the amount of carbon-14 in the sample
* Ao is the original amount of carbon-14 in the sample
* ln is the natural logarithm function
In this case, A = 0.32 and Ao = 1.0. So, the age of the skull is:
```
Age = (5,730 * ln(0.32) / ln(2)) = 11,460 years
```
Step-by-step explanation:
Answer:
4535 years.
Step-by-step explanation:
The formula used to calculate the age of a sample by carbon-14 dating is3:
t=−0.693ln(N0Nf)×t1/2
where:
t is the age of the sample
Nf is the number of carbon-14 atoms in the sample after time t
N0 is the number of carbon-14 atoms in the original sample
t1/2 is the half-life of carbon-14 (5730 years)
In your case, the skull contains 32% of its original amount of carbon-14, which means that Nf/N0 = 0.32. You can plug in this value and the half-life into the formula and get:
t=−0.693ln(10.32)×5730
Using a calculator, you can simplify this expression and get:
t=−1.139×−0.693×5730
t=4534.7
PLEASE HELP
Will give brainliest
The volume of this cylinder is 2,769.48 cubic inches. The radius is 7 inches. What is the height? Use 3.14 and round your answer to the nearest hundredth.
PLEASE HELP
The height of the cylinder will be 18 inches.
Given that:
Volume, V = 2,769.48 cubic inches
Radius, r = 7 inches
Let r be the radius and h be the height of the cylinder.
Then the volume of the cylinder will be given as,
V = π r²h cubic units
The height of the cylinder is calculated as,
2,769.48 = 3.14 x 7² x h
2,769.48 = 153.86h
h = 18 inches
The height of the cylinder will be 18 inches.
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Solve: 2sin ^2x=1 in the interval [0,2pie)
As per the mention equation, the solutions in the interval [0, 2π) are calculated out to be x = π/4, 3π/4, 5π/4, 7π/4
We know that:
2 sin²(x) = 1
sin²(x) = 1/2
Taking the square root of both sides, we get:
sin(x) = ±√(1/2)
So, either:
sin(x) = √(1/2) = 1/√2
or
sin(x) = -√(1/2) = -1/√2
To find the solutions in the interval [0, 2π), we need to look for the values of x that satisfy each of these equations.
For the first equation, sin(x) = 1/√2, we know that this is true for x = π/4 or x = 7π/4, since sin(π/4) = sin(7π/4) = 1/√2.
For the second equation, sin(x) = -1/√2, we know that this is true for x = 3π/4 or x = 5π/4, since sin(3π/4) = sin(5π/4) = -1/√2.
Therefore, the solutions in the interval [0, 2π) are:
x = π/4, 3π/4, 5π/4, 7π/4
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Alex's house is due west of Lexington and due south of Norwood. Lexington is 6 miles from Alex's house and 8 miles from Norwood. How far is Norwood from Alex's house, measured in a straight line? If necessary, round to the nearest tenth.
Alex's house is due west of Lexington and due south of Norwood. using Pythagorean theorem, the Norwood is 10 miles from Alex's house, measured in a straight line.
The Pythagorean theorem is a fundamental concept in mathematics that relates to the sides of a right triangle.
It states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.
We can use the Pythagorean theorem to solve this problem.
Let x represents the distance we want to find.
Using the Pythagorean theorem, we can write:
[tex]x^2 = 6^2 + 8^2\\x^2 = 36 + 64\\x^2 = 100[/tex]
x = sqrt(100)
x = 10
Therefore, Norwood is 10 miles from Alex's house, measured in a straight line.
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I NEED HELP WITH MY HOME WORK!!!! An aquarium holds
12
1212 liters of water.
How many aquariums can we fill with
48
4848 liters of water?
Include fractions of aquariums, if applicable.
aquariums
Answer:
Step-by-step explanation:
48 over 12 = 4 is the answer
help asap 7th grade math
The probability that the card that Olga turns over has a rose on it would be 4/5.
Since, Probability refers to a possibility that deals with the occurrence of random events.
The probability of all the events occurring need to be 1.
P(E) = Number of favorable outcomes / total number of outcomes
Given that;
There are 5 cards with a picture of a rose and 1 card with a picture of a daisy.
Olga keeps all the cards face down on the table with the pictures hidden and mixes them up.
Then , Total number of cars after Olga removed one rose card from the table is,
4 rose cards + 1 Daisy card
= 5
Therefore, the probability divide the number of rose cards left by the total number of cards left is,
= 4/5
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three friends decide to go out to eat, and then go shopping. if there are 5 local restaurants and 4 good stores for shopping, how many possibilities are there for their big night out? (hint: they can only pick one of each.)
In case of three friends decide to go out to eat, and then go shopping there are 20 possibilities are there for their big night out.
The problem is asking for the total number of possibilities when three friends decide to go out to eat and then go shopping. Since they can only pick one restaurant and one store, we can use the multiplication principle to determine the total number of possibilities.
There are 5 options for the restaurant and 4 options for the store, so the total number of possibilities is 5 x 4 = 20. Therefore, there are 20 different combinations of restaurant and store that the three friends can choose from for their big night out.
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Nuclear reactions can be written out in equation form with information about the nuclei that take place in the fusion reaction and the nuclei that are produced. In one to two sentences, explain how you would identify the reaction as fusion, and give two different criteria.(2 points)
Nuclear fusion involves the combination of two light nuclei to form a heavier nucleus with emission of energy.
Since,
A nuclear reaction equation is a representation of the change that takes place as one nucleus is converted to another. A nuclear transformation could be any of the following;
⇒ Nuclear fission
⇒ Nuclear fusion
⇒ Transmutation
We can know that a nuclear fusion is taking place when two nuclei come together to form a larger nucleus and emit energy. I would identify a nuclear fusion when;
⇒ Two light atom combine to give a larger nucleus
⇒ Tremendous energy is produced
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HELP ME TODAY PLEASE ITS REALLY HARD FOR ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
10. a. no
b. yes
c. no
d. no
e. no
11. a. yes
b. no
c. yes
d. no
e. no
if n/10 equals 0.41 then n is approximately?
Answer:
To solve for n, we can multiply both sides of the equation by 10:
n/10 = 0.41
n = 10 x 0.41
n = 4.1
Therefore, n is approximately 4.1.
Step-by-step explanation:
The sector of a circle has a radius of 5.5 m and a central angle 100 degrees. What is the area of the sector rounded to the nearest hundredth?
Answer: so, if l is the length of the arc, r is the radius of the circle and θ is the angle subtended at the centre, then; θ = l/r, where θ is in radians
Central angle, θ = (Arc length × 360º)/(2πr) degrees or Central angle, θ = Arc length/r radians, where r is the radius of the circle. The formula is Degrees = Radians × 180 / π and it can be used for both positive and negative values. The sector of a circle is a slice of a circle, bound by two radiuses and an arc of the circumference. We identify sectors of a circle using their central angle. The central angle is the angle between the two radiuses. Sectors with a central angle equal to 90° are called quadrants.
Match the vocabulary term to the correct definition.
2-Way Frequency Table
Marginal Frequency
Joint Frequency
Conditional Frequency
Answer:
1. 2-way frequency table goes with the 1st one
2. Marginal frequency goes with the 4th one
3. joint frequency goes with the 3rd one
4. conditional frequency goes with the 2nd one
pls pls help due in an hour
Answer:
Its the second one
Step-by-step explanation:
its the second one. i looked it up.
Answer:
Step-by-step explanation:
it is the first one because linear is that is related to a line or in order the input is fine going by one’s but the output is not so the output has a problem and it’s not linear so it’s the first option.
