If Poolas family hiked the same distance each day for 6 days, traveling a total of 25 miles, the number of miles they hiked every day is:
4 1/6 miles each day.
We are trying to find the distance that the Poolas hiked each day. We know that they hiked a total of 25 miles in 6 days.
To find the distance they hiked each day, we divide the total distance by the number of days:
25 / 6 = 4 1/6So the Poolas family hiked 4 1/6 miles each day. This answer can be expressed as a mixed number, where the whole number is 4 and the fraction is 1/6.
A mixed number is a number that combines a whole number and a fraction. In this case, the whole number represents the number of whole miles the Poolas hiked, and the fraction represents the extra distance beyond a whole mile that they hiked.
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For the purposes of a marketing research, a survey of 1000 women is conducted in a town. The results show that 52 % liked watching comedies, 45% liked watching fantasy movies and 60% liked watching romantic movies. In addition, 25% liked watching comedy and fantasy both, 28% liked watching romantic and fantasy both and 30% liked watching comedy and romantic movies both. 6% liked watching none of these movie genres. Find The number of women who like watching at least two of the given genres
The number of women who like watching at least two of the given genres 1640 women.
Let's call the number of women who liked watching comedies C, the number who liked watching fantasy movies F, and the number who liked watching romantic movies R.
From the information given, we know:
C = 1000 * 52% = 520 women liked watching comedies
F = 1000 * 45% = 450 women liked watching fantasy movies
R = 1000 * 60% = 600 women liked watching romantic movies
We also know that:
25% of women liked watching both comedies and fantasy, so 0.25 * 1000 = 250 women.
28% of women liked watching both romantic and fantasy, so 0.28 * 1000 = 280 women.
30% of women liked watching both comedies and romantic, so 0.30 * 1000 = 300 women.
However, these numbers overlap because some women like all three genres, so we have to subtract the number of women who like all three genres from our total. We don't know the number of women who like all three genres, but we can calculate it by adding up the number of women who liked two genres and subtracting from the total number of women:
Number of women who liked all three genres = (C + F + R - (C & F) - (C & R) - (F & R) + (C & F & R)) = (520 + 450 + 600 - 250 - 300 - 280 + (C & F & R))
Since 6% of women liked watching none of these movie genres, we can subtract this from our total:
C & F & R = 1000 - 6% * 1000 = 940 women
So the number of women who like watching at least two of the given genres = (520 + 450 + 600 - 250 - 300 - 280 + 940) = 1640 women.
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Example
The product of 4 and (3 + x) is equal to 36. What is the value of x?
The equation 4(3 + x) = 36 models this statement.
Think: 4 times what number is 36?
Since 4.9 equals 36, that means (3 + x) equals 9.
Since 3 + x = 9, and 3 + 6 = 9, that means x equals 6.
The sum of twice a number, n, and 14 is 30. Write an equation that models this
statement. Then explain how you might use reasoning to find the value of n.
The equation that models the statement is: 2n + 14 = 30 and the solution is x = 8
How to determine the equation and the solutionFrom the question, we have the following parameters that can be used in our computation:
The sum of twice a number, n, and 14 is 30.
When represented as an equation, we have
2n + 14 = 30
Subtract 14 from both sides
2n = 16
So, we have
n = 8
Hence, the value of n is 8
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I thought of a 2 digit number. It' a multiple of 9 and the um of it digit i 1/5 of the number itelf. What i my Number?
The 2-digit number that is a multiple of 9 and the sum of it digits is 1/5 of the number itself is 45.
Howto find the 2-digit number?A 2-digit number can be written as:
a*10 + b
Where a and b are single digit numbers.
We know that the number is a multiple of 9, and we also know that:
a + b = (1/5)*(a*10 + b)
We can isolate one of the variables:
a + b = 2a + (1/5)b
b - (1/5)b = 2a - a
(4/5)b = a
So, now we need to find values of b such that:
a is also a whole number.
10a + b is a multiple of 9.
if b = 5 we will get:
(4/5)*5 = a
4 = a
Then the number is 45, which is 5*9, so it is a multiple of 9.
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Which statement in the proof is not correctly supported?
Statement 3, because this statement is true only by the addition property of equality.
Statement 3, because the transitive property applies only to congruence and equality.
Statement 2, because the sum of the angles needs to be given as 180 to apply the linear pair theorem.
Statement 2, because the linear pair theorem only applies to angles that are complementary.
describe the end behavior of the graph of the function f(x)=−5(4)x−10 .
For the function f(x) = -5(4)x - 10, the end behaviour signifies that [x→∞,f(x)→-∞] and [x→-∞,f(x)→∞].
What is a function?
In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.
The given function is f(x) = -5(4)x - 10
On solving the function it gives -
f(x) = -20x - 10
The graph for the function is plotted.
The end behavior of a function f(x) describes the behavior of the function as x approaches +∞ and as x approaches -∞.
Since the leading term of the polynomial (the term in the polynomial which contains the highest power of the variable) is -20x, the degree is 1, i.e. odd, and the leading coefficient is -20, i.e. negative.
This means that function f(x) approaches ∞ as x approaches -∞, and f(x) approaches -∞, as x approaches ∞.
Therefore, the end behaviour is [x→∞,f(x)→-∞] and [x→-∞,f(x)→∞].
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Find the area of the region bounded by the parabola y = 5x2, the tangent line to this parabola at (1, 5), and the x-axis.
The area of the region bounded by the parabola is [tex]\frac {5}{12} $[/tex].
Area of the region bounded by y=f(x) and x axis between x=a and x=b is given by [tex]$\int_a^b f(x) d x$[/tex]. The coordinates of all the points mentioned are first calculated and then finally the area of required region OAC is calculated.
The area of the region bounded by the parabola y=[tex]5x^{2}[/tex].
The area that needs to be calculated is the area enclosed by OAC as shown in figure.
From the figure, it is clear that
Area of region OAC=area of region OAB-area of region ABC......(1) let us first calculate the equation of the tangent at(1,5).
⇒[tex]$\frac{d y}{d x}=10 x \Rightarrow \frac{d y}{d x}(1,5)=10$$[/tex]
Equation of tangent is y-5=10(x-1).
This tangent intercepts x axis at [tex]$x=\frac{-5}{10}+1=\frac{1}{2}$[/tex] (Putting y=0 in equation of tangent)
Hence, coordinates of C is (0.5,0) and B is (1,0).
⇒BC=OB−OC⇒BC=1−0.5=0.5
The area of region ABC is [tex]$\frac{1}{2} * B C * A B=\frac{1}{2} * 0.5 * 5=\frac{5}{4}$[/tex]
Now area of region OAB is given by [tex]$\int_0^1 5 x^2 d x \Rightarrow\left[\frac{5}{3} x^3\right]_0^1=\frac{5}{3}$[/tex]
Area of region OAB is thus [tex]$\frac{5}{3}$[/tex]
Now using equation (1) area of region OAC [tex]=\frac{5}{3}-\frac{5}{4}=\frac{5}{12}$[/tex]
The area of region OAC is [tex]\frac {5}{12} $[/tex].
Therefore, the area of the region is [tex]\frac {5}{12} $[/tex].
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Part of a train timetable is shown.
Preston
Nuneaton
07 29
08 52
Milton Keynes 09 28
08 40
10 28
11 11
1221
1354
14 24
a) Llyr catches the 08 40 train from
Preston. He arrives in
Nuneaton 6 minutes late.
What time does he arrive in
Nuneaton?
1034
b) How long is Llyr's journey from
Preston to Nuneaton?
Give your answer in minutes.
c) Kathy catches the 07 29 train from Preston.
She arrives in Nuneaton on time.
She attends a job interview.
She gets back to Nuneaton station 1 hour and 50 minutes later.
Is she back in time to catch the 10 28 train to Milton Keynes?
You must show your working.
minute
The time that Llyr arrives at Nuneaton, given that it is 6 minutes late, is 10 34.
Llyr's journey from Preston to Nuneaton took 114 minutes.
Kathy would not catch the 10 28 train to Milton Keynes.
How to find the time ?Llyr is meant to arrive in Nuneaton at 10 28 but arrived 6 minutes later which is:
= 10 28 + 6
= 10 34
The time that the trip took is therefore:
= Arrival at Nuneaton - Departure at Llyr
= 10 34 - 08 40
= 1 hour 54 minutes
= 114 minutes
The time that Kathy would get back to the station is:
= Arrival time at Nuneaton + 1 hour 50 minutes
= 08 52 + 1 hour 50
= 10 42
This is too late for the 10 28 train to Milton Keynes.
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a patent is the exclusive right to a product for a period of enter your response here years from the date the patent is filed with the government. (enter your response as an integer.)
A patent is a form of intellectual property that gives an individual or organization the exclusive right to manufacture, use, and/or sell an invention for a set period of time.
The length of a patent varies by country, but generally lasts for 20 years from the date the patent is filed with the government. This period can be extended in certain cases if the patent office grants a patent term extension.
The formula for calculating the length of a patent is: Length of Patent = Initial 20 Year Period + Extension. The initial 20 year period starts from the filing date of the patent application and is the same for all countries. However, the length of the extension varies depending on the country and the circumstances of the patent. For example, some countries may offer a 5-year extension, while others may offer a 10-year extension.
The length of a patent must be carefully calculated so that the patent owner can maximize the benefits of the patent. By calculating the patent length and extension, the patent owner can ensure that they are able to take advantage of their exclusive right to the invention for the maximum amount of time possible.
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A certain cylinder and square prism have equal lateral surface area. Given the height of the cylinder is equal to the height of the prism, what is the ratio of the volume of the cylinder to the volume of the prism?
The ratio of the volume of the cylinder to the volume of the prism is 4/π.
The volume of a cylinder is the number of unit cubes (cubes of unit length) that can be fit into it. It is the space occupied by the cylinder as the volume of any three-dimensional shape is the space occupied by it. The volume of a cylinder is measured in cubic units such as cm3, m3, in3, etc.
The volume of a square prism is referred to as the amount of space occupied by a 3-dimensional prism that has two congruent square bases and four rectangular faces are known as the volume of square prism. It is measured in cubic units. The volume of a prism is the product of the cross-sectional area and its length. The cross-sectional area is also known as the base area of the square prism.
We are given that a certain cylinder and square prism have equal lateral surface area.
Lateral surface area of cylinder = 2πrh
Lateral surface area of square prism = 4sH
So, 2πrh = 4sH
Also, the height of the cylinder is equal to the height of the prism.
So, h=H
Put in above equation:
2πrh = 4sh
⇒ πr = 2s
⇒ r/s = 2/π
The ratio of the volume of the cylinder to the volume of the prism
⇒ Volume of cylinder/ Volume of prism
⇒ πr²h/s²h
⇒ π(r/s)²
⇒ π(2/π)² ---- (From above)
⇒ 4/π
Thus, the ratio of the volume of the cylinder to the volume of the prism is 4/π.
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ind the work required to project a 4 oz object initially at rest to 170 ft/sec.
In other to get the height of the object after 4 seconds is to substitute 4 into the equation is h= 260 for the given velocity
given the equation:
h = -16t^2 + 129t
we are to find the height of the object after 4 seconds
in other to get the height of the object after 4 seconds is to substitute 4 into the equation.
that means we replace t by 4 in the equation
so,
h = - 16t^2 + 129t
substituting 4 into the equation
h = -16(4)^2 + 129(4)
h = - 16(16) + 516
h = -256 + 516
h =260
complete question
If an object is projected upward with an initial velocity of 129 ft per sec, its height h after t seconds is h = - 1662 + 129t. Find the heightof the object after 4 seconds.The height of the object after 4 seconds is(Simplify your answer.)ft.
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he total number of scarves knitted varies directly with the number of days. Four scarves require 6 days to knit.
Write a direct variation equation to represent this relationship. Express the constant of variation as a decimal.
Answer:
s = 1.5d
where s = number of scarves knitted
d = number of days required to knit s scarves
Step-by-step explanation:
Let s represent the number of scarves knitted in 4 days
The direct variation relationship is s = kd where k = constant of proportionality
So k = s/d
For s = 6, d = 4
So k = 6/4 = 1.5
So the direct variation equation is s = 1.5d
How do I solve this to find the point on a graph?
Answer:
Step-by-step explanation: This equation only contains enough information to define a line in a Koordinates system as far as i can tell. One point on this line would be y=3 and x=0 another one y=0 and x=15:4
i think xD
William needs to translate ALMN by the rule (x, y) -> (x - 4, y + 7) Which of the following graphs represents that translation?
The sum of angles is 360 degrees is the required graph which represents the translation.
What is triangle ?
Triangle can be defined in which it consists of three sides , three angles and sum of three angles is always 180 degrees.
Given,
x , y and z are exterior angles of triangle ABC.
So,
By angle sum property of triangle
Angles of
1 + 2 + 3 = 180
1 + z = 180
3 + y = 180
2 + x = 180
z + 180 = 1
y + 180 = 3
x + 180 = 2
So,
by substituting we get ,
180 - z + 180 - y + 180 - x = 180
x + y + z = 180 +180 + 180 - 180
x+ y +z = 360
Therefore, The sum of angles is 360 degrees is the required graph which represents the translation.
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What is the geometric mean of 16 and 27
Answer:
The answer is 12
Step-by-step explanation:
there are different books to arrange on a shelf: 3 blue, 3 greens, and 2 red. a) in how many ways can the books be arranged on a shelf? enter the answer without commas. b) if books of the same color are to be grouped together, how many arrangements are possible? enter the answer without commas.
To calculate the number of ways to arrange the books on a shelf, we can use the formula for permutations.
The formula for permutations is [tex]\frac{n!}{(n-r)!}[/tex]
where: n is the total number of items
r is the number of items being selected.
a. In this case, there are 8 books total (3 blue + 3 green + 2 red), and we are arranging all of them.
so n= 8 and r = 8, the number of arrangements is
[tex]\frac{8!}{(8-8)!}[/tex] = 8! = 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 40320
So the answer to (a) is 40320.
b. To calculate the number of arrangements if the books of the same color are grouped, we can consider each group as one item.
There are 3 groups (blue, green, red), and we are arranging those
so n = 8 and r = 3.
Hence, the number of arrangements is
[tex]\frac{8!}{(8-3)!}[/tex] = [tex]\frac{8!}{5!}[/tex] = [tex]\frac{8x7x6x5x4x3x2x1}{5x4x3x2x1}[/tex] = 336
So the answer to (b) is 336.
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Ramin and Akbar Habil obtained a $98,000 mortgage loan at an annual interet rate of 6. 24%. The loan i for a period of 22 year, and the Habil will pay it in equal monthly payment that include interet. Find the (a) monthly payment , (b) amount paid, and (c) total interet charged
The monthly payment is 611.52, amount paid is 161,441.28 and total interest charges is 63,441.
Find the (a) monthly payment, (b) amount paid, and (c) total interest charged?Monthly payment, amount paid, and total interest charged are all terms related to loans, mortgages, or other forms of credit. Here's what each term means:
Monthly payment: This is the amount of money that you need to pay each month to repay a loan or mortgage over a specified period of time. The monthly payment typically includes both the principal amount (the amount of money borrowed) and the interest charged on that amount.
Amount paid: This is the total amount of money that you will have paid by the time the loan or mortgage is fully repaid. It includes the principal amount borrowed, as well as any interest and fees that are charged.
Total interest charged: This is the total amount of money that you will have paid in interest charges by the time the loan or mortgage is fully repaid. It is calculated by subtracting the principal amount borrowed from the total amount paid.
According to question:
a)98,000/1000×6.24=611.52
Therefore, monthly payment is 611.52.
b)611.52(12×22) =161,441.28
Therefore, amount paid is 161,441.28.
c)161441-98000=63,441
Therefore, total interest charges 63,441
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A survey of all being on planet Hopt found that 10% preferred quect juice to all other juices. If 2 preferred quect juice, how many beings were surveyed altogether
Answer:
the answer is 20
Step-by-step explanation:
formulate the given
2/10%
rewrite the fraction
2/0.1 (then multiply both the numerator and denominator with the same integer)
= 20/1 (then simplify)
= 20
FA: 20
Answer:
Step-by-step explanation:
You are going to factor the polynomial x^2−17x+16x, you find the product of (a)(c)and the sum of (b.) Which two factors would you choose to factor your polynomial?
Answer:
Below
Step-by-step explanation:
I believe your equation is incorrect ( perhaps a typo)
probably it is x^2 - 17x +16
then you could choose factors 16 and 1
to get this (x-1)(x-16)
solve the system
6x+2y=-4
x-2y=4
Answer:
x = 0
y = -2
Step-by-step explanation:
1. 6x+2y = -4
2. x - 2y = 4
in our second equation lets isolate x
x = 2y + 4
now lets plug this into our first equation
6(2y+4) + 2y = -4
12y + 24 + 2y =-4
14y +24 = -4
14y = -28
y = -2
lets plug in y into the second equation to find x
x = 2(-2)+4
x = -4+4
x = 0
Question(0)1) The unique solution to the initial value problemy' + y = g(t), y(0)=y0is y(t) = 6e^(-4t) -4t -1 Determine the constant y0 and the function g(t)y0=g(t).
The constant y(t) = (y0-5)e^(-t) + 6e^(-4t) - 4t - 1; g(t) = (y0-4)e^(-t) + 6e^(-4t) - 4t; y0 = g(t).
What is algebra ?
Algebra is a branch of mathematics in which arithmetic operations and other formal manipulations are applied to abstract symbols rather than specific numbers.
Since y(t) = 6e^(-4t) - 4t - 1 is the general solution of the non-homogeneous equation y' + y = g(t), we can write it as:
y(t) = C1e^(-t) + 6e^(-4t) - 4t - 1
Setting t = 0 and using the initial condition y(0) = y0, we get:
y0 = C1 + 6 - 4 * 0 - 1
Solving for C1, we get:
C1 = y0 - 5
So, the general solution of the non-homogeneous equation is:
y(t) = (y0 - 5)e^(-t) + 6e^(-4t) - 4t - 1
Finally, the function g(t) can be found by comparing the general solution of the non-homogeneous equation with the right-hand side of the equation:
g(t) = (y0 - 5)e^(-t) + 6e^(-4t) - 4t - 1 + y = (y0 - 5 + 1)e^(-t) + 6e^(-4t) - 4t
Therefore, g(t) = (y0 - 4)e^(-t) + 6e^(-4t) - 4t.
So, the constant y(t) = (y0-5)e^(-t) + 6e^(-4t) - 4t - 1; g(t) = (y0-4)e^(-t) + 6e^(-4t) - 4t; y0 = g(t).
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A boat heading out to sea starts out at Point A, at a horizontal distance of 853 feet from a lighthouse/the shore. From that point, the boat’s crew measures the angle of elevation to the lighthouse’s beacon-light from that point to be 7 ∘ ∘ . At some later time, the crew measures the angle of elevation from point � B to be 4 ∘ ∘ . Find the distance from point � A to point � B. Round your answer to the nearest foot if necessary.
The distance from A to B is 355.42 feet.
What are trigonometric identities?There are three commonly used trigonometric identities.
Sin x = 1/ cosec x
Cos x = 1/ sec x
Tan x = 1/ cot x or sin x / cos x
Cot x = cos x / sin x
We have,
From the figure,
Tan 4 = PQ/853
PQ = tan 4 x 853
PQ = 0.07 x 853 _____(1)
Tan 7 = PQ/(853 - x)
PQ = tan 7 x (853 - x)
PQ = 0.12 x (853 - x) ______(2)
Now,
From (1) and (2) we get,
0.07 x 853 = 0.12 x (853 - x)
59.71 = 102.36 - 0.12x
0.12x = 102.36 - 59.71
0.12x = 42.65
x = 355.42 feet
Thus,
A to B distance is 355.42 feet.
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Barium metal was quantitatively precipitated from a 1.52 g sample of BaCl2∙2H2O. The mass of the barium that was collected was 0.844 g. Calculate the experimental mass percent of barium in the sample.
The experimental mass percent of barium in the sample is 55.526.
What is Percentage?percentage, a relative value indicating hundredth parts of any quantity.
Given that the Barium metal was quantitatively precipitated from a 1.52 g sample of BaCl₂∙2H₂O.
The mass of the barium that was collected was 0.844 g.
We need to find the experimental mass percent of barium in the sample.
Let x/100 is the percentage of Barium.
x/100×1.52=0.844
0.0152x=0.844
x=55.526
Hence, the experimental mass percent of barium in the sample is 55.526.
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what is the volume of a cell in cm^3 with an edge length of 10 angstroms?
The Volume of the cell with an edge length of 10 Angstroms is 1×10⁻²¹cm³.
The volume of a cube with edge length of "L" is calculated as "L³" .
In order to find the volume of a cube with edge length = 10 angstroms (A) , we first need to convert the units to cm.
we know that 1 Angstrom = 1×10⁻⁸ cm,
So, 10 angstroms = 10×10⁻⁸ cm ;
The volume of a cell with an edge length of 10 Angstroms can be calculated as follows:
The volume of the cube in cm³ is = (10×10⁻⁸ cm)³
⇒ 10³×10⁻²⁴ cm³
⇒ 1×10⁻²¹ cm³ .
Therefore , the volume of the cell is 1×10⁻²¹ cm³ .
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Please show your work.
Point (2, 1) is not the solution of the inequality y ≥ (1/2)x + 3.
What is inequality?Inequality is defined as an equation that does not contain an equal sign. Inequality is a term that describes a statement's relative size and can be used to compare these two claims.
The inequality is given below.
y ≥ (1/2)x + 3
Check whether point (2, 1) is the solution or not. Then we have
1 ≥ (1/2)(2) + 3
1 ≥ 1 + 3
Point (2, 1) is not the solution of the inequality y ≥ (1/2)x + 3.
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What postulate, if any, can be used to prove the triangles are congruent?
Answer: The correct option is, (B) SAS.
Step-by-step explanation: The SAS Postulate says that triangles are congruent if any pair of corresponding sides and their included angle are congruent.
Can someone help me with 11 and 12 plss
Answer:
Q11: x = 3
Q12: x = -4
Step-by-step explanation:
Q11
We have the equation as
[tex]\:64^{2x\:+\:4}=16^{5x}[/tex]
Convert the bases in terms of the common base 4
64 = 16 x 4 = 4 x 4 x 4 = 4³
16 = 4 x 4 = 4²
Therefore the original equation becomes:
[tex]\mbox {\large 4^{3\left(2x+4\right)}=4^{2\cdot \:5x}}[/tex]
Since the bases are the same in this equation, the exponents must also be the same
Equation the two exponents we get
3(2x + 4) = 2·5x
==> 6x + 12 = 10x
Move 12 to the right side
6x = -12 + 10x
Move 10x to the left:
6x - 10x = -12
-4x = -12
x = -12/-4 = 3
Answer to Q11
-------------------------------------------------------------
Q12
We can solve this in a similar manner to Q12
27 = 3 x 3 x = 3³
9 = 3 x 3 = 3²
Plugging these in we get
[tex]\mbox {\large 27^x = 3^{3(x)} = 3^{3x}}[/tex]
[tex]\mbox {\large 9^ {(x - 2)} = 3^{2(x-2)} = 3^{2x -4} }\\\\[/tex]
Thus we get
[tex]\mbox {\large 3^{3x} = 3^{2x -4} }\\\\[/tex]
Equating the exponents we get
[tex]3x = 2x - 4\\\\3x - 2x = -4\\\\x = -4[/tex]
ANSWER to 12
2=From Sonnet XIX, by John Milton That murmur, soon replies, "God doth not need Either man’s work or his own gifts; who best Bear his mild yoke, they serve him best. His state Is kingly. Thousands at his bidding speed And post o’er land and ocean without rest: They also serve who only stand and wait. "
The mood of this sestet in Sonnet XIX by John Milton is hopeful.
This quote is from John Milton's Sonnet XIX and speaks about the idea that serving God does not necessarily mean doing physical work for him, but rather bearing his "mild yoke" with devotion.
The line "They also serve who only stand and wait" suggests that waiting for God's will with patience and humility is a form of service in itself. This sonnet explains how a devotee must be. The state of God is described as "kingly" and those who serve him well are said to speed at his bidding, without rest.
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The question for the answer is
That murmur, soon replies, “God doth not need
Either man’s work or his own gifts; who best
Bear his mild yoke, they serve him best. His state
Is kingly. Thousands at his bidding speed
And post o’er land and ocean without rest:
They also serve who only stand and wait.”
What is the mood of this sestet in Sonnet XIX by John Milton?
grim
hopeful
detached
somber
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Exercise 0.2.1: Check that the y given is really a solution to the equation. Next, take the second order differential equation dy for some constantk > 0. The general solution for this equation is yx) Ci cos(kx) + C2 sin(kx). Note that because we have a second order differential equation, we have two constants in our general solution Exercise 0.2.2: Check that the y given is really a solution to the equation And finally, take the second order differential equation dy dx Py for some constantk > 0. The general solution for this equation is yx) CieCe* or yx = D1 cosh(kx) + D2 sinh(kx)
y = C1e^(kx) is a valid solution to the equation.
To check that the given y is a solution to the equation, we must first substitute the given y into the given equation. We can do this by substituting the constants C1, C2, and k into the equation. We then move each side of the equation to the same side and simplify. This will result in an equation of 0 = 0, which confirms that the given y is a solution to the equation. In this case, the general solution to the second order differential equation dy dx + ky is yx) C1 cos(kx) + C2 sin(kx) or yx = D1 cosh(kx) + D2 sinh(kx). As such, the given y is a solution to the equation.
For the given equation, dy/dx = Py, with a constant k > 0, the given solution is y = C1e^(kx) or y = D1 cosh(kx) + D2 sinh(kx). To check that this is a valid solution, we can substitute the given solution into the equation and calculate dy/dx. If the result is equal to Py, then we can be sure that the given solution is a valid solution to the equation. For example, if we take the first solution y = C1e^(kx), then we can calculate dy/dx as dy/dx = C1ke^(kx) which is equal to Py = kC1e^(kx). We can see that the two sides are equal, so we can confirm that y = C1e^(kx) is a valid solution to the equation.
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A limousine service has 15 cars available for rides: 8 are Lincoln Town Cars and the remainder are Cadillac models. Suppose an event organizer requests five limousines from this company. How many different collections C of five limousines are possible?
If A limousine service has 15 cars available for rides: then the number of different collections C of 5 limousines are possible is 3003 .
To find the number of different collections C of five limousines, we can use combinations. A combination is a way to choose a subset of items from a larger set, without regard to order.
Let the number of Cadillac models n.
Then, 15 - 8 = 7 cars are Cadillacs. So, n = 7.
The number of different collections of 5 limousines from the 15 cars is given by the number of combinations of 5 items taken from a set of 15 items:
⇒ ¹⁵C₅ = 15!/(5!×(15 - 5)!) = 15!/(5!×10!) = 3003.
Therefore , there are 3003 different collections C of five limousines that the event organizer can choose from the limousine service's fleet of 15 cars.
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What is an example of categorical data?
Examples of categorical variables are race, sex, age group, and educational level.
What is of categorical data?Categorical data is a body of knowledge that is organised into categories. For example, if a company or government is attempting to collect personnel biodata, the resulting information is referred to as category.Examples of categorical data include gender, political party (republican, democrat, or other), and hair colour (red, blonde, or black) (male, female, or other). Because neither of these can be compared to the other, they are categorical in nature.Binary, nominal, and ordinal variables are the three different categories of category variables.A trait that cannot be quantified is referred to as a categorical variable, often known as a qualitative variable. Nominal or ordinal categorical variables are also acceptable.To learn more about categorical data refers to:
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