Answer:
f(n)= f(1)+d(n-1)
Step-by-step explanation:
the aerithmetric explict formula is the one above, but im not sure what the question is asking, your difference is 4 btw
Consider Sn = 1/2 + 1/4 + 1/8 + 1/16 +...+ 1/2^n a Find S1, S2, S3, S4 and S5 in fractional form b From A guess the formula for Sn c Find Sn using Sn= u1(1-r^n)/1-r d Comment on S, as n gets very large. e What is the relationship between the given diagram and d?
Part (a)
S1 = 1/2 since we only have one term, i.e. we aren't really summing anything here.
S2 = (1/2) + (1/4) = (2/4) + (1/4) = (2+1)/4 = 3/4
S3 = (1/2) + (1/4) + (1/8) = (4/8) + (2/8) + (1/8) = (4+2+1)/8 = 7/8
Or,
S3 = S2 + 1/8 = (3/4) + (1/8) = (6/8) + (1/8) = (6+1)/8 = 7/8
S4 = S3 + 1/16 = (7/8) + (1/16) = (14/16) + (1/16) = (14+1)/16 = 15/16
S5 = S4 + 1/32 = (15/16) + (1/32) = (30/32) + (1/32) = (30+1)/32 = 31/32
Here's the summary:
S1 = 1/2S2 = 3/4S3 = 7/8S4 = 15/16S5 = 31/32=============================================================
Part (b)
Through trial and error, the formula is
Sn = ( (2^n) -1 )/(2^n)
For example, if n = 4, then,
Sn = ( (2^n) -1 )/(2^n)
S4 = ( (2^4) -1 )/(2^4)
S4 = (16 - 1)/(16)
S4 = 15/16
=============================================================
Part (c)
u1 = first term = 1/2
r = common ratio = 1/2
Sn = u1*( 1 - r^n)/(1 - r)
Sn = (1/2)*( 1 - (1/2)^n )/(1 - 1/2)
Sn = (1/2)*( 1 - (1/2)^n )/(1/2)
Sn = 1 - (1/2)^n
Sn = 1 - 1/(2^n)
Sn = (2^n)/(2^n) - 1/(2^n)
Sn = ( (2^n) -1 )/(2^n)
This helps confirm the formula mentioned in part b
=============================================================
Part (d)
As n gets very large, Sn approaches 1
Examples:
n = 7 leads to S7 = 0.9921875n = 10 leads to S10 = 0.9990234375n = 12 leads to S12 = 0.999755859375n = 20 leads to S20 = 0.999999046325684Try out larger values of n and the Sn value should get closer to 1.
The reason why this works is because Sn = (x - 1)/x where x = 2^n
The (x-1)/x is equivalent to 1 - (1/x) and the 1/x approaches zero when x gets larger. The x gets larger as 2^n does.
The value of Sn itself will never equal 1 exactly. It simply gets closer and closer.
=============================================================
Part (e)
The diagram is missing, so I don't have enough info to be able to answer this.
Graph the equation by plotting three
points. If all three are correct, the line
will appear.
-4y = x - 18
If three points (2,4), (6,3), (10,2) are correct, the line -4y = x - 18 will appear.
If all the three points are plotted correctly then the line obtained will be -4y = x - 18.
The form of equation of line is the slope intercept form of line. In this form of line, the line is represented with the slope of line and the intercept of the y axis.
By using the equation of the line, all the three correct points can be found out easily,
By assuming any three values of x, we can find the value of y.
1. Let us assume x = 2.
Putting value of x we get,
-4y = 2 - 18
-4y = -16
y = 4.
So, the first point is (2,4).
2. Let us assume x = 6.
Putting value of x we get,
-4y = 6-18
-4y = -12
y = 3.
So, the second point is (6,3).
3. Let us assume x = 10.
Putting value of x we get,
-4y = 10-18
-4y = -8
y = 2.
So, the third point is (10,2).
The three points to obtain the equation of line -4y = x -18, are (2,4), (6,3) and (10,2).
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Make c subject of the formula
πc² =A
Answer: c=[tex]\sqrt{A/\pi}[/tex]
Step-by-step explanation:
πc²=A
c²=A/π
c=[tex]\sqrt{A/\pi}[/tex]
Pablo mixes 3 units of white paint and 1 unit of black oaint to make gray paint. What two equations show the relationship between units of white paint and unites of black paint
100 points, please help
In 8-11, write a justification for each conclusion.
Answer:
8. Supplementary means that two angles add up to 180 degrees (straight line). For the justification, I would simply write "def. of supplementary angles."
9. Equilateral means that all sides equal. For the justification, I would simply write "def. of equilateral triangle."
10. In a circle, all radiuses equal in length. TC and ZC are both radiuses. For the justification, I would simply write "def. of radius."
11. A midpoint divides a line segment in half. For the justification, I would simply write "def. of midpoint."
Find the equation of the line which passes through (4,1) and is parallel to the line with equation 2y=x+1
Parallel to the line:
[tex]{\sf{2y = x + 1}}[/tex]
[tex]{\sf{y = \frac{x}{2} + \frac{1}{2 }}} [/tex]
Hence Slope:
[tex]{\sf{\large{\frac{1}{2}}}}[/tex]
The slope of line of which equation we need is parallel to the line given. Therefore, it's slope also is (m):
[tex]{\sf{\large{\frac{1}{2}}}} [/tex]
Also, the line passes through the points (4, 1)
Therefore by the formula of
[tex]{\sf{(y - y1) = m(x - x1)}}[/tex]
we have:
[tex]{\sf{(y - 1) = \frac{1}{2} (x - 4) }}[/tex]
[tex]{\sf{2y - 2 = x - 4}}[/tex]
[tex]{\sf{x - 4 - 2y + 2 = 0}}[/tex]
[tex]{\sf{\red{\boxed{\sf{x - 2y - 2 = 0}}}}}[/tex]
The function g(x)=x² + 3px + (14p - 3), where p is an integer, has two equal roots.
a Find the value of p.
b For this value of p, solve the equation x² + 3px + (14p - 3)
a, The value of p is 6 and 2/9
b. After solving the equation x is equal to 9
a. If the roots of a quadratic ax² + bx = c = 0, are equal then the discriminant is zero express as
b² - 4ac = 0
W have given the equation x² + 3px + (14p - 3) = 0
Here, a = 1
b = 3p
c = 14p - 3
So, substitute the value and we get
⇒ (3p)² - 4(14p -3) = 0
⇒ 9p² - 56p + 12 = 0
⇒ 9p² - 2p - 54p + 12
⇒ p(9p - 2) -6(9p - 2)
⇒ (9p - 2)(p - 6)
⇒ p = 6, p = 2/9
b. Lets substitute p = x in x² + 3px + (14p - 3)
⇒ x² + 3(6)x + (14(6) - 3)
⇒ x² + 18x + (84 - 3)
⇒ x² + 18x + 81
⇒ x² + 9x + 9x + 81
⇒ x(x + 9) +9(x + 9)
⇒ (x + 9)(x + 0)
⇒ x = 9
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Find the sum of the following numbers:
-7, 14, 10, -21
Answer:
-4
Step-by-step explanation:
Let's solve this step by step:
-7 + 14 = 7
7 + 10 = 17
17 - 21 = -4
Your answer would be -4
Rearrange the formula d=rt to solve for time.
im having a lil trouble with this one guys
Answer:
t = d/r
Step-by-step explanation:
d = rt
We are solving for t, so you need t alone on the left side.
Switch sides.
rt = d
t is being multiplied by r, so you need to divide the left side by r to get rid of r. You must do the same operation to both sides of an equation, so divide both sides of the equation by r.
rt/r = d/r
rt/r is simply t, so we get:
t = d/r
1. Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5-mile swim, a
12.4-mile bike ride, and a 3.1-mile run.
a. Yu Yan completes the swim portion of the sprint triathlon in 25 minutes. What is her average
swimming speed in miles per minute?
The required average speed of the triathlon is 0.02 miles per minute.
Given that,
Total distance swim in the triathlon = 0.5 miles
Total time consumed to swim = 25 minutes
To determine the average speed of swimming in the triathlon.
Here,
Total time consumed to complete the swim portion of the triathlon = 25 minute
Distance swim = 0.5 miles
Speed of swim or average speed of swim = distance swim \time
= 0.5 / 25
= 0.02 miles / minute.
Thus, the required average speed of the triathlon is 0.02 miles per minute.
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HELP 14 POINTS!!! QUESTION IN PICTURE!!
The value of x is 27
In this question, we have been given a line AB and a point O on the line AB.
From figure we can see that, there are linear angles ∠AOM, ∠MON, and ∠NOB
Also, ∠AOM = 36°,
∠MON = 90°, and
∠NOB = 2x
We need to find the value of x.
We know that the sum of linear angles is 180°
⇒ ∠AOM + ∠MON + ∠NOB = 180°
⇒ 36° + 90° + 2x = 180°
⇒ 126° + 2x = 180°
⇒ 2x = 180 - 126°
⇒ 2x = 54°
⇒ x = 27
Therefore, the value of x is 27
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This question is throwing me off track. Help?
Solve 1/3x + 6/5 = 3/5
The slashes means that it is a fraction btw! Thanks so much if you do help me :)
Answer:
x= -9/5
Step-by-step explanation:
I hope this helps!
What is the domain and range for first graph
We need to know about domain and range of a graph to solve this problem. The domain is (-∞,5) and the range is (-∞,2).
The domain of a function is the input values that the function can take. The range is the set of values that can be the possible output of the function. The domain of a graph are the values that are on the x-axis and the range is on the y-axis. The arrow means that the graph goes on till infinity, a solid sphere means that the graph ends at that point and the ending point is included in the function, a hollow sphere means the graph ends at that point and the ending point is not included in the function. In the graph in the question, along x-axis the values on left goes on till negative infinity and on right the domain is open at 5. For range along y-axis, the range on the left side goes on till negative infinity and on the right it is open at 2.
Therefore we see that the domain of the graph is (-∞,5) and the range is (-∞,2).
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a rectangular parking lot has a length that is 420 yards greater than the width. the area of the parking lot is 13 square yards. find the length and the width.
The length and the widths are 420.031 yards and 0.031 yards if a rectangular parking lot has a length that is 420 yards greater than the width.
What is a rectangle?It is defined as two-dimensional geometry in which the angle between the adjacent sides is 90 degrees. It is a type of quadrilateral.
It is defined as the area occupied by the rectangle in two-dimensional planner geometry.
The area of a rectangle can be calculated using the following formula:
Rectangle area = length x width
Let L be the length and W be the width of the rectangle.
From the question:
L = 420 + W (based on the data given in the question)
LW = 13
(420 + W)W = 13
W² + 420W - 13 = 0
After solving the above quadratic equation:
W = 0.031, W = -420.03 (width cannot be negative)
W = 0.031 yards (which is not practical but from a mathematical point of view it can be considered)
L = 420 + 0.031 = 420.031 yards
Thus, the length and the widths are 420.031 yards and 0.031 yards if a rectangular parking lot has a length that is 420 yards greater than the width.
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Of the numbers 0.4761, 0.04761, 0.4671, and 0.04671, which is the largest?
Answer:
0.4761
Step-by-step explanation:
It is in the 10ths place making it bigger than 0.04761 and 0.04671
Then in the hundreths place for 0.4761 7 is bigger than the 6 in in the hundreths place of 0.4671, so the answer is
0.4761
Fabio and Carlos play on a basketball team together. In the last game, Fabio had 777 points less than 222 times as many points as Carlos. Fabio scored 313131 points in the game.
Write an equation to determine the number of points (c) Carlos scored in the last game.
Find the number of points Carlos scored in the last game.
Considering the definition of an equation and the way to solve it, the number of points Carlos scored in the last game is 19.
Definition of equationAn equation is the equality existing between two algebraic expressions connected through the equals sign in which one or more unknown values, called unknowns, appear in addition to certain known data.
The solution of a equation means determining the value that satisfies it. To solve an equation, keep in mind:
When a value that is adding, when passing to the other member of the equation, it will subtract.If a value you are subtracting goes to the other side of the equation by adding.When a value you are dividing goes to another side of the equation, it will multiply whatever is on the other side.If a value is multiplying it passes to the other side of the equation, it will pass by dividing everything on the other side.This caseBeing:
"C" the number of points Carlos scored."F" the number of points Fabio scored.and knowing that in the last game, Fabio had 7 points less than 2 times as many points as Carlos, the equation to determine the number of points Carlos scored in the last game is:
2C - 7= F
Fabio scored 31 points in the game. So you get:
2C - 7= 31
Solving:
2C= 31 + 7
2C= 38
C= 38 ÷ 2
C=19
Finally, the number of points Carlos scored in the last game is 19.
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determine whether the underlined numerical value is a parameter or a statistic. explain your reasoning. in a sample of 12000 students
The underlined part in the given case is a statistic.
What is a parameter and a statistic?A statistic is a number that describes a sample, whereasA parameter is a number that describes the entire population (such as the population mean) (e.g., sample mean).Now,
In a given sample of 12000 students, the underlined part is a statistic, because:
The data set of a sample of 12000 students is a sample, satisfying the definition of statistic.Hence, the underlined part is a statistic.
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Given: A is between B and C. if AB =x+2, BC=4x-7 , and AC =2x-1 , find x and AC
If A is between B and C, and AB=x+2, BC=4x-7 and AC=2x-1, then the x=8 and AC=15 units.
Given,
That A is between B and C.
AB= x+2
BC= 4x-7
AC= 2x-1
Then,
BC = AB+AC
4x-7= x+2+2x-1
4x-7= 3x+1
4x-3x=1+7
x=8
Then the length of the line AC is
AC= 2x-1
AC= 2×8-1 =15 units
Hence, If A is between B and C, and AB=x+2, BC=4x-7 and AC=2x-1, then the x= 8 and AC= 15 units
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Given: f ( x ) = 2x - 7 and g ( x ) = x 2 + 2x - 3, find f ( x ) + g ( x )
Answer:
2x^2+4x−13
Step-by-step explanation:
Which weight represents the 65th percentile?
The 65-th percentile is approximately 83.8 ounces.
A number at or below which a particular percentage falls in its frequency distribution, or a score below which a given percentage falls, is known as the k-th percentile in statistics. The 50th percentile, for instance, is the score at or below which 50% of the distribution's scores can be found.
The 50-th percentile is called the median.The 25th and 75th percentile is called the lower and upper percentile respectively.Mean of a data-set is the measure of central tendency which denotes the average of the data.The standard deviation denotes the fluctuations of the data from the central tendency.The percentile can be calculated by using the formula
Percentile Value = μ + zσ where
z is the z-score , μ is the mean and σ is the standard deviation.
Here the percentile that is to be calculated is 65.
So we take the value that is closest to 0.65 from the z-table.
We get the value of the data to be 0.39
Now putting the values in the equation we get:
Percentile Value = μ + zσ
or, Percentile Value = 83 + (0.39 × 2)
or, Percentile Value = 83.78
or, Percentile Value ≈ 83.8
Hence the 65th percentile value of the function is given by 83.8 .
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prove that if all of the 2n subsets of a set containing 2n 1 are equal, then all elements of set n are equal
when multiplicity is removed, you get 2^(2n+1)/2 members, which is 2^(2n).
Take the power set. It has 2^(2n+1) members.
Replace any member which has n+1 or more elements with its complements.
Now the power set has members, which have n or fewer elements, and each such member appears twice.
Therefore, when multiplicity is removed, you get 2^(2n+1)/2 members, which is 2^(2n).
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In an AP the 9th Term is 2 times the 4th Term and the 12th Term is 78. What is the sum of the first twenty terms?
The sum of the first twenty terms of the given AP is 1380.
An arithmetic progression is given in this problem.Let the first term of the AP be "a".Let the common difference between the terms of the AP be "d".Let the term in the "n" position be denoted by t(n).t(n) = a + (n-1)*dIt is given that the 12th term is 78.t(12) = a + 11d78 = a + 11dThis is equation 1.It is given that the 9th term is twice the 4th term.t(9) = 2*t(4)a + 8d = 2(a + 3d)a + 8d = 2a + 6da = 2dThis is equation 2.Solving equations 1 and 2, we get the values of "a" and "d".The value of "a" is 12 and "d" is 6.The sum of the first "n" terms of an AP is given by the formula :S(n) = (n/2)[2a + (n-1)d]We need to find the sum of the first 20 terms.S(20) = (20/2)[2*12 + 19*6]S(20) = 10*(24 + 114)S(20) = 10*138S(20) = 1380To learn more about common difference, visit :
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PLS HELPP IM LOST
1: Find the missing Statements #3, #7, and #8 in the Algebraic Proof below.
2: What are the missing statements for #4 and #6?
Answer:
#3: -2 = 2y - 8
#7: 3 = y
#8: y = 3
#4: Angle1 + Angle2 = Angle ABC
#6: Angle 1 and Angle 2 are supplementary
Step-by-step explanation:
6y - 2 = 8y - 8
8 - 2 = 8y - 6y
6/2 = 2y/2
3 = y
y = 3
A fisk tank in the shape of a cube. its volume is 125ft. what is the area of one face of the tank
The area of one face of the fish tank in the shape of a cube is 25 ft²
The formulas and the procedures we will use are:
v = s³A= 6*s²Where:
s= edge lengthv= volumeA = areaInformation about the problem:
v = 125ft³s = ?A = ?Applying the volume formula and isolating the edge length, we have:
v = s³
s = [tex]\sqrt[3]{}[/tex]v
s = [tex]\sqrt[3]{}[/tex](125 ft³)
s = 5 ft
With the edge length, we calculate the area of the cube of one face of the tank:
Total faces of the cube = 6
One face of the cube = 1
A= 1*s²
A= 1*(5ft)²
A= 1*25ft²
A= 25 ft²
What is the area?Is the measure of the space occupied by a body bounded by an environment called perimeter, the same is expressed in units of squared side. Example: ft2, m2
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nightclub management you have just opened a new nightclub, russ' techno pitstop, but are unsure of how high to set the cover charge (entrance fee). one week you charged $9 per guest and averaged 315 guests per night. the next week you charged $12 per guest and averaged 270 guests per night.
The answers to all the parts of the question are:
(A) q(p) = -15p + 300(B) R(p) = -15p² + 300p(C) C(p) = -30p + 1600(D.1) P(p) = -15p²+ 330p - 1600(D.2) p = $11(A) Before we begin, consider the cartesian plane, where the x-axis represents the cover charge and the y-axis represents the number of guests per night.
According to the previous information, we will find the following coordinates there: (9,165) (10,150).
Remember that the linear equation's slope-intercept form is y=mx+b, where m is the slope and b is the intercept.
The slope can be calculated using the following formula:
[tex]m=\frac{y^2-y^1}{x^2-x 1}[/tex]In this case, the first coordinate will be (9,165) and the second will be (10,150).
The order is irrelevant.
Finally, we get the same value for m.
So,
m = (150 - 165)/(10 - 9) = -15We now have the slope and two points. Find a linear demand equation using this formula and remember that the point-slope form of a line's equation is y - y1 = m(x - x1).
Any of two coordinates can be selected.
In this case, we will select the second one.
We can choose between two coordinates.
In this case, we'll go with the second option.
y-150=-15(x-10) ....... (1)Solve equation (1) for y:
y = -15x + 150 + 150y = -15x + 300We defined x as the cover charge (p) and y as the number of guests above (q).
As a result, rewrite equation 1.
q(p) = -15p + 300Its formula depicts the number of guests per night as a function of the cover charge.
(B) The nightly revenue can be calculated by multiplying the cover charge price by the number of guests.
So we simply multiply the equation 1 by p.
p × q(p) = p × (-15p +300)R(p) = -15p² + 300p ......(2)(C) To calculate the nightclub's cost function, multiply the cost of two non-alcoholic drinks by the number of guests (equation 1) and add nightly overheads.
C(p) = 2 × (-15p+300) + 1000C(p) = -30p + 600 + 1000C(p) = -30p + 1600(D) To calculate the profit in terms of the cover charge, subtract the nightly costs (equation 3) from the nightly revenue (equation 2).
P(p) = R(p)-C(p)P(p) = -15p² + 300p - (-30p + 1600)P(p) = -15p² + 300p+30p - 1600P(p) = -15p² + 330p - 1600We will use the first derivative test (y'(x)=0) to find an extremum point to determine the entrance fee we should charge for maximum profit.
P's first derivative should be computed (p)
P'(p) = -30p + 330 = 0
30p = 330
p = 330/30
p = $11
For maximum profit, the entrance fee should be p=$11 per guest.
Therefore, the answers to all the parts of the question are:
(A) q(p) = -15p + 300(B) R(p) = -15p² + 300p(C) C(p) = -30p + 1600(D.1) P(p) = -15p²+ 330p - 1600(D.2) p = $11Know more about equations here:
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The complete question is given below:
You have just opened a new nightclub, Russ' Techno Pitstop, but are unsure of how high to set the cover charge (entrance fee). One week you charged $9 per guest and averaged 165 guests per night. The next week you charged $10 per guest and averaged 150 guests per night.
(a) Find a linear demand equation showing the number of guests q per night as a function of the cover charge p. q(p) =
(b) Find the nightly revenue R as a function of the cover charge p. R(p) =
(c) The club will provide two free non-alcoholic drinks for each guest, costing the club $2 per head. In addition, the nightly overheads (rent, salaries, dancers, DJ, etc.) amount to $1,000. Find the cost C as a function of the cover charge p. C(p) =
(d) Now find the profit in terms of the cover charge p. P(p) =
Determine the entrance fee you should charge for a maximum profit. p = $ per guest.
(7x10^9)(5.3x10^2). Write this in scientific Notation
The required answer would be 3.7×10¹⁰ which is written in the form of scientific notation.
What is the Scientific Notation?Scientific Notation is a way of writing down in the easy form of very large or very small numbers.
We have been given that expression as:
⇒ (7×10⁹)(5.3×10²)
⇒ 7×5.3 ×10⁹×10²
We have to add exponents of tens and apply the multiplication operation between 7 and 5.3,
⇒ 37 ×10⁹⁺²
⇒ 3.7×10⁻¹ ×10¹¹
⇒ 3.7×10¹⁰
Hence, the required answer is 3.7×10¹⁰ which is expressed in scientific notation.
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Maker the subject of this formula.
V = ³√p+r?
Answer:
here's the answer I have in the photo and solution too
Find the 8th term of the geometric sequence shown below. 6x,18x^4,54x^7
please help
The 8th term of the geometric sequence is 13122x^22
Explicit form of a geometric sequenceThe explicit form of a geometric sequence is expressed according to the equation;
Tn = ar^n-1
where
r is the common ratio
a is the first term
n is the number of terms
Given the sequence below;
6x,18x^4,54x^7
r = 18x^4/6x
r = 3x^3
a = 6x
n = 8
Substitute to have:
T8 = 6x(3x^3)^8-1
T8 = 6x (3x^3)^7
T8 = 13122x^22
Hence the 8th term of the geometric sequence is 13122x^22
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what dose 7/8 x 2/3 =
Answer:
14/24
Step-by-step explanation:
multiply 7 x 2 and 8 x 3
Answer:
Step-by-step explanation:
7/8 * 2/3
7 * 2 = 14
8 * 3 = 24
14/24 = 7/12
answer: 7/12
The equation y = 2.50x determines the total cost, y, of buying x carnival tickets. Use the drop-down menu to complete the sentence.
According to the equation, 15 carnival tickets would cost.
.
The cost of 15 carnival tickets is 37.5 dollars.
How to use the equation to find the cost of 15 ticket ?The equation y = 2.50x determines the total cost, y, of buying x carnival tickets.
where
x = number of carnival tickety = total costTherefore, according to the equation, the cost of 15 carnival ticket can be calculated as follows:
y = 2.50x
where
x = 15
Hence,
y = 2.50 × 15
y = 37.5 dollars
Therefore, the cost of 15 carnival tickets is 37.5 dollars.
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