Answer:
10.81 ft
Step-by-step explanation:
You want the length of the shortest ladder that will reach over a 2 ft high fence to reach a building 6 ft from the fence.
Trig relationsRelevant trig relations are ...
Sin = Opposite/Hypotenuse
Cos = Adjacent/Hypotenuse
Ladder lengthIn the attached diagram, the ladder is show as line segment CD, intersecting the top of the fence at point B. The length of the ladder is the sum of segment lengths BD and CB.
Using the above trig relations, we can write expressions that let us find these lengths in terms of the angle at D:
sin(D) = AB/BD ⇒ BD = AB/sin(D)
cos(D) = BG/CB ⇒ CB = BG/cos(D)
Then the ladder length is ...
CD = BC +CB = AB/sin(D) +BG/cos(D)
CD = 2/sin(D) +6/cos(D)
MinimumThe minimum can be found by differentiating the length with respect to the angle. This lets us find the angle that gives the minimum length.
CD' = -2cos(D)/sin²(D) +6sin(D)/cos²(D)
CD' = 0 = (6sin³(D) -2cos³(D))/(sin²(D)cos²(D)) . . . common denominator
0 = 3sin³(D) -cos³(D) . . . . the numerator must be zero
Factoring the difference of cubes, we have ...
0 = (∛3·sin(D) -cos(D))·(∛9·sin²(D) +∛3·sin(D)cos(D) +cos²(D))
The second factor is always positive, so the value of D can be found from
∛3·sin(D) = cos(D)
D = arctan(1/∛3) . . . . . . . divide by ∛3·cos(D), take inverse tangent
D ≈ 37.736°
CD = 2/sin(37.736°) +6/cos(37.736°) = 3.51 +7.30 = 10.81 . . . feet
The shortest ladder that reaches over the fence to the building is 10.81 feet.
__
Additional comments
The second attachment shows a graphing calculator solution to finding the minimum of the length versus angle in degrees.
The ladder length can also be found in terms of the distance AD.
L = BD(1 +BG/AD) = (1 +6/AD)√(4+AD²)
The minimum L is found when AD=∛(BG·AD²) = ∛24 ≈ 2.884.
what does x equal to? 10x+48=18x+-34
Answer: 41/4 or 10.25 or 10 1/4
Step-by-step explanation:Exact Form:
x
=
41
4
Decimal Form:
x
=
10.25
Mixed Number Form:
x
=
10
1
4
What happens to the value of the expression 100-x as x increases
The number 100-x has a decreasing worth as x rises.
What does a mathematical expression look like?A mathematical statement is referred to as an expression or an algebraic expression if it contains numbers, factors, and a numerical operation between them..For example, the arithmetic sign + separates the terms 4m and 5 from of the variable m in the expression 4m + 5..
The number 100-x has a decreasing worth as x rises. This is due to the fact that the phrase 100-x denotes a linear equation with a -1 slope. This indicates that the expression's value drops by one for each unit rise in x. As a result, the expression's value decreases as x increases. For instance, if x is 50, the expression's value is 50; however, if x is 70, the expression's value is 30. The meaning of the equation decreases in proportion to how much x increases.
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What is the simplified form of [tex]\sqrt{400x ^{100}[/tex]
Answer:
[tex]20x^{50}[/tex]
Step-by-step explanation:
This is because you are simplifying the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.
There is your answer!
1) Keith decided to look at new and used SUVs. Keith found a used SUV for $20000. A new SUV is $25000, so what percent of the price of a new SUV does Keith pay for a used SUV? Round your answer to the nearest whole number if necessary.
Keith pays about 80% of the price of a new SUV for the used SUV.
To find what percent of the price of a new SUV Keith pays for a used SUV, we need to divide the price of the used SUV by the price of the new SUV and then multiply by 100 to express the answer as a percentage:
used SUV price / new SUV price * 100%
Substituting the given values, we get:
$20,000 / $25,000 * 100% ≈ 80%
So Keith pays about 80% of the price of a new SUV for the used SUV. Rounded to the nearest whole number, this would be 80%.
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The regular price of a laptop computer is $865. 0. This week, it is on sale for $812. 00 off. What is the sale price of the computer?
The sale price of the laptop computer is $53.00. We subtracted the discount amount from the original price.
Discount is a reduction in the price of a product or service that is offered to customers by a seller, usually as an incentive to increase sales or clear out inventory. It is typically expressed as a percentage of the original price.
To calculate the sale price of the laptop computer, we need to subtract the discount amount from the original price.
Discount amount = Regular price - Sale price
Discount amount = $865.00 - $812.00
Discount amount = $53.00
Therefore, the sale price of the laptop computer is $812.00.
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What is the possible range of y-values that, along with x=-4, form a solution to the following inequality? 10x-3y>-4
The possible range of y-values that form a solution to the inequality along with x=-4 is y<-12
The possible range of y-values that, along with x=-4, form a solution to the inequality 10x-3y>-4 can be found by isolating y on one side of the inequality. Here are the steps to do so:
1. Start with the given inequality: 10x-3y>-4
2. Plug in x=-4: 10(-4)-3y>-4
3. Simplify the left side of the inequality: -40-3y>-4
4. Add 40 to both sides of the inequality: -3y>36
5. Divide both sides of the inequality by -3 and reverse the inequality sign: y<-12
Therefore, the possible range of y-values that form a solution to the inequality along with x=-4 is y<-12. This means that any value of y that is less than -12 will satisfy the inequality when x=-4.
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Natalie and johnathan are asked to write an expression equivalent to 2(2x + 2y
The expression equivalent to 2(2x + 2y) are,
⇒ 4 (x + y)
Or, (4x + 4y)
What is an expression?An expression which is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division is called an mathematical expression.
Given that;
The expression is,
⇒ 2 (2x + 2y)
Since, Natalie and Johnathan are asked to write an expression equivalent to 2(2x + 2y).
Hence, We get;
⇒ 2 (2x + 2y)
Take 2 as common;
⇒ 2 × 2 (x + y)
⇒ 4 (x + y)
⇒ 4x + 4y
Thus, The expression equivalent to 2(2x + 2y) are,
⇒ 4 (x + y)
Or, (4x + 4y)
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HELP ASAPPPP question in image
The value of the given trigonometric expression is -1.45.
What are trigonometric ratios?The sides and angles of a right-angled triangle are dealt with in Trigonometry. The ratios of acute angles are called trigonometric ratios of angles. The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec).
The given trigonometric expression is tan(-2π/3)/sin(7π/4) -sec(-π)
We know that, π=180°
tan(-2×180°/3)/sin(7×180°/4) -sec(-180°)
= tan(-2×60°)/sin(7×45°)-sec(-180°)
= tan(-120°)/sin315°-(-1)
= √3/(-√2/2)+1
= -2√3/√2 +1
= -√6+1
= -2.45+1
= -1.45
Therefore, the value of the given trigonometric expression is -1.45.
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Eva is driving to a concert and needs to pay for parking. There is an automatic fee of $12 just to enter the parking lot, and when she leaves the lot, she will have to pay an additional $4 for every hour she had her car in the lot. How much total money would Eva have to pay for parking if she left her car in the lot for 5 hours? How much would Eva have to pay if she left her car in the lot for
�
t hours?
The total money Eva would have to pay for parking if she left her car in the lot for 5 hours is $32.
Eva would have to pay (12 + 4t) if she left her car in the lot for t hours.
How much total money would Eva have to pay for parking if she left her car in the lot for 5 hours?Automatic fee = $12
Additional fee per hour = $4
Total fee paid = y
Number of hours = t
y = 12 + 4t
When t = 5 hours
y = 12 + 4t
= 12 + 4(5)
= 12 + 20
y = 32
Therefore, the total money Eva would have to pay for 5 and t hours is $32 and (12 + 4t) respectively.
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at a local department store shirts were sold for 15 each.
This price was 80% of their regular price. What was the original price?
Therefore, the original price of the shirts was $18.75 each.
A mathematical equation: what does it mean?An equality on both sides of the equal to sign signifies a mathematical equation, which is a relationship between two expressions. Here is an example of an equation: 3y = 16.
If the selling price of the shirts was 80% of their regular price, then we can use the following equation to find the original price:
Original price * 0.8 = Selling price
Let's substitute the given values into the equation:
Original price * 0.8 = 15
To solve for the original price, we need to isolate it on one side of the equation. We can do this by dividing both sides by 0.8:
Original price = 15 ÷ 0.8
Original price = 18.75
Therefore, the original price of the shirts was $18.75 each.
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20% tip, 8% tax sales. Total $23. 04, what is the pretax?
For a 20% tip, 8% tax sales. Total $23. 04, we can say that The pre-tax cost is $19.20.
Let x be the pre-tax cost of the sales. Then we can set up the equation:
x + 0.20x + 0.08x = 23.04
Simplifying and solving for x, we get:
1.28x = 23.04
x = 23.04 / 1.28
x = 18
Therefore, the pre-tax cost of the sales is $18. However, we need to add the 20% tip and 8% tax to this amount to get the total cost of $23.04. The tip is $3.60 (0.20 * 18) and the tax is $1.44 (0.08 * 18), which when added to $18 gives us a total cost of $23.04.
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 If triangle ABC ~ triangle AVW, find the values of x
The value of x that satisfies the proportion is x = 7.5.
Since triangle ABC ~ triangle AVW, we know that their corresponding sides are proportional. In other words:
AB/AV = BC/VW = AC/AW
We are given that AB = 8, BC = 5, AC = 7, AV = 12, and VW = x. We need to find the value of x that satisfies the proportion above.
Using the first two ratios, we get:
AB/AV = BC/VW
8/12 = 5/x
Multiplying both sides by 12x, we get:
8x = 60
x = 7.5
Now, we can use the third ratio to check our answer:
AB/AV = AC/AW
8/12 = 7/AW
Multiplying both sides by AW, we get:
8AW = 84
AW = 10.5
We can now check that the ratios are all equal:
AB/AV = BC/VW = AC/AW
8/12 = 5/7.5 = 7/10.5
Simplifying each fraction, we get:
2/3 = 2/3 = 2/3
Therefore, the value of x that satisfies the proportion is x = 7.5.
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Eddie says a property of trapezoids is that they have 2 pairs of opposite sides that are parallel. Lacy disagrees. She says Eddie's statement describes an attribute of this trapezoid, not a property of all trapezoids. Who is correct? Explain.
Answer: Lacy is correct. Eddie's statement describes an attribute of a specific trapezoid, not a property of all trapezoids.
A trapezoid is defined as a quadrilateral with at least one pair of parallel sides. Therefore, it is true that all trapezoids have at least one pair of parallel sides. However, not all trapezoids have 2 pairs of opposite sides that are parallel.
The trapezoid that Eddie is describing is a special type of trapezoid called an isosceles trapezoid. An isosceles trapezoid has two pairs of opposite sides that are parallel and congruent legs. However, not all trapezoids are isosceles trapezoids.
Therefore, Lacy is correct in stating that Eddie's statement describes an attribute of a specific trapezoid, not a property of all trapezoids.
Step-by-step explanation:
Question 3 For each of the following, explain whether it is always) true or (possibly) false. If true, you must explain why. If false, you must give a concrete counterexample (with numbers).
a). (1.5pts) If the linear system Ax = b has infinitely many solutions, then 6 is a linear combination of the columns of A. b). (1.5pts) If a 3x3 matrix A has rank 2, then Null(A) is a plane through the origin. c). (1.5pts) If {ū, v} is linearly dependent then so is {ü, v, w}.
a) This system has infinitely many solutions, but 6 is not a linear combination of the columns of A, which are [2, 3] and [4, 6].
b) The null space of the matrix, which is the set of all solutions to the homogeneous equation Ax = 0, is a subspace of dimension 3 - 2 = 1, which is a line through the origin.
c) The set {ū, v} is linearly independent, but the set {ü, v, w} is linearly dependent, as w can be written as a linear combination of ū and v (w = ū + v).
a). (1.5pts) This statement is possibly false. It is not always true that if the linear system Ax = b has infinitely many solutions, then 6 is a linear combination of the columns of A. A concrete counterexample would be the linear system:
2x + 3y = 6
4x + 6y = 12
This system has infinitely many solutions, but 6 is not a linear combination of the columns of A, which are [2, 3] and [4, 6].
b). (1.5pts) This statement is always true. If a 3x3 matrix A has rank 2, then Null(A) is a plane through the origin. This is because the rank of a matrix is the number of linearly independent columns in the matrix, and if the rank is 2, then there are 2 linearly independent columns in the matrix. This means that the null space of the matrix, which is the set of all solutions to the homogeneous equation Ax = 0, is a subspace of dimension 3 - 2 = 1, which is a line through the origin.
c). (1.5pts) This statement is possibly false. It is not always true that if {ū, v} is linearly dependent then so is {ü, v, w}. A concrete counterexample would be the vectors ū = [1, 0], v = [0, 1], and w = [1, 1]. The set {ū, v} is linearly independent, but the set {ü, v, w} is linearly dependent, as w can be written as a linear combination of ū and v (w = ū + v).
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3. Suzy borrowed R2 400 from a bank for a period of two year and six months at a simple annual interest rate of 4.7% How much must she repay at the end of the period?
The amount Suzy must repay at the end of the period is R2 682.
What is simple interest?Simple interest is a method of calculating the interest charge. Simple interest can be calculated as the product of principal amount, rate and time period.
Simple Interest = (Principal × Rate × Time) / 100
In this case, we have:
P = R2 400
r = 0.047 (since the annual interest rate is 4.7%)
t = 2.5 years (since the period is two years and six months)
Substituting these values into the formula, we get:
I = 2400 * 0.047 * 2.5
I = 282
Therefore, the interest is R282.
The total amount to be repaid is the sum of the principal and the interest, which is:
2400 + 282 = R2 682
Therefore, by the simple interest the answer will be R2 682.
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A cereal company fills boxes with 16 ounces of cereal. The acceptable percent error in filling a box is 2.5%. Find the least and the greatest acceptable weights.
The least acceptable weight is
ounces.
The greatest acceptable weight is
ounces.
Answer:
Least acceptable weight= 15.6 ounces
and Greatest acceptable weight=16.4 ounces
Step-by-step explanation:
A cereal company fills boxes with 16 ounces of cereal.
The acceptable percent error in filling a box is 2.5%.
i.e. the error in decimal is: 2.5/100 x 16 = 25/1000 x 16 = 0.4
Hence,
the least acceptable weight is obtained by subtracting the actual amount with the error.
16-0.4=15.6 ounces.
and the greatest acceptable weight is obtained by adding the error to the actual weight.
16+0.4=16.4 ounces
Hence,
Least acceptable weight= 15.6 ounces
and Greatest acceptable weight=16.4 ounces.
1. Ben joins a book club. He pays $12 for each book and $5 for shipping and handling
charges for each order.
a.Name the quantities that change in this problem situation and the quantities that
remain constant. Determine which quantity is independent and which quantity
is dependent.
B. Create a table of values to represent the total cost if Ben orders 1 or 2 books or
spends $41, $65, or $125.
Answer:
A. The quantities that change in this problem situation are the number of books Ben orders and the total cost. The quantities that remain constant are the cost per book ($12) and the shipping and handling charge per order ($5).
The independent variable is the number of books Ben orders, as this is the variable that Ben has control over and chooses to change. The dependent variable is the total cost, as it depends on the number of books Ben orders.
B.
(imagine this as a chart)
Number of books Total cost
1 $17
2 $29
3 $41
5 $65
10 $125
----------------------------------------------------------------------------------------------------------
To create this table, we used the formula:
Total cost = (Cost per book x Number of books) + Shipping and handling charge
For example, when Ben orders 3 books, the total cost is:
Total cost = ($12 x 3) + $5 = $41
Similarly, when Ben spends $65, the number of books he can order is:
Number of books = (Total cost - Shipping and handling charge) / Cost per book
Number of books = ($65 - $5) / $12 = 5
And so on for the other values in the table.
Answer:
See below
Step-by-step explanation:
Let x be he cost per book and y be the total cost including shipping and handling.
The relevant equation is
y = 12x + 5
A. Variables are number of books ordered(x) and total cost(y)
The constant is the shipping and handling cost
Since the total cost depends on the number of books ordered, the independent variable x = number of books
The total cost y is the dependent variable
--------------------------------------------------------------------------------------
B. Cost of 1 or 2 books can be found by plugging in x = 1 and x =2 into the equations and solving for y
Total Cost of 1 book = 12(1) + 5 = $17
Total cost of 2 books = 12(2) + 5 = 24 + 5 = $29
To compute the number of books that can be ordered for different total cost amounts is obtained by substituting for y and solving for x
For $41:
41 = 12x + 5
41 - 5 = 12x
36 = 12z
x = 36/12 = 3 books
For $65:
65 = 12x + 5
65 - 5 = 12x
60 = 12x
x = 60/12 = 5 books
For $125:
125 = 12x + 5
125 - 5 = 12x
120 = 12x
x = 120/12 = 10 books
Here is the table
Number Total Cost(y)
of books (x)
1 $17
2 $29
3 $41
5 $65
10 $125
What amount of excess reserves will Goldstar Bank now have as a result of this deposit?
Goldstar Bank will have $42,000 in excess reserves as a result of this deposit. These excess reserves can be used to make additional loans or investments.
When a customer makes a deposit in a bank, the bank is required to hold a certain percentage of that deposit as reserves. The reserve requirement is set by the central bank and is typically a percentage of the bank's total deposits.
In this case, the customer has deposited $50,000 into Goldstar Bank and the reserve requirement is 16 percent. This means that Goldstar Bank must hold 16 percent of the deposit as reserves and can loan out the remaining amount.
The amount of reserves that Goldstar Bank must hold is:
16% of $50,000 = 0.16 x $50,000 = $8,000
This means that Goldstar Bank can loan out:
$50,000 - $8,000 = $42,000
However, since the question asks for the number of excess reserves Goldstar Bank will have, we need to subtract the required reserves from the total reserves.
The total reserves after the deposit will be:
Required reserves = $8,000
Excess reserves = Total reserves - Required reserves = $50,000 - $8,000 = $42,000
Complete question:
Suppose that initially Goldstar Bank is completely "loaned up." A customer then deposits $50,000 into the bank. The reserve requirement is 16 percent.
1. What amount of excess reserves will Goldstar Bank now have as a result of this deposit?
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Marco Edwards Question 6 - 3 Points Cob 24, 8:57:21 AM Find the slope of a line perpendicular to the line whose equation is 3x+y=8. oully simplify your answer. Answer: Submit Answer
The slope of a line perpendicular to the line whose equation is 3x+y=8 is 1/3.
The slope of a line perpendicular to the line whose equation is 3x+y=8 can be found by first finding the slope of the given line and then taking the negative reciprocal of that slope.
To find the slope of the given line, we can rearrange the equation to solve for y:
3x+y=8
y=-3x+8
Now we can see that the slope of the given line is -3. To find the slope of a line perpendicular to this one, we take the negative reciprocal of -3, which is 1/3.
Therefore, the slope of a line perpendicular to the line whose equation is 3x+y=8 is 1/3.
Answer: 1/3
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Mr. Sonny's science class is calculating the average number of blinks per minute. Jan blinks 54 times in 3 minutes. What is her blinking rate, in blinks per minute?
Answer: 18 blinks per minute
Step-by-step explanation: so for this you take 54 and divide it by three
54/3=18
blinks per minute=18
Answer:
18
Step-by-step explanation:
54\3=18
therefore Jan blinks 18 times per minutes
Math question 12 help
Answer:
It's neither of them. The function is neither odd nor even
What is the simplified form of x minus 5 over x squared minus 3x minus 10 ⋅ x plus 2 over x squared plus x minus 12 ? (6 points)
The simplified form of the rational expression is given as follows:
[(x - 5)/(x² - 3x - 10)] x [(x + 2)/(x² + x - 12)] = 1/[(x + 4)(x - 3)]
How to simplify the rational expression?The rational expression for this problem is defined as follows:
[(x - 5)/(x² - 3x - 10)] x [(x + 2)/(x² + x - 12)].
To simplify the rational expression, first we must factor the quadratic equations at the denominator of each of the fractions, hence:
x² - 3x - 10 = (x - 5)(x + 2).x² + x - 12 = (x + 4)(x - 3).The simplification of the first quadratic function, x² - 3x - 10 = (x - 5)(x + 2), means that the numerators of each of the fractions can be simplified.
As the numerators of each of the fractions are simplified along with x² - 3x - 10, the remaining part is x² + x - 12, hence the simplified expression is given as follows:
[(x - 5)/(x² - 3x - 10)] x [(x + 2)/(x² + x - 12)] = 1/[(x + 4)(x - 3)]
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pls help me with this math assignment ! give you a like
pic down below ⬇️
In the molecule of phosphorus pentachloride:
Three collinear points are J, H, LTwo opposite rays include Lines HG and HIAnother name for line JH is Line HJThe different planes that contain line HL are Plane HKL, Plane HLISee attached imageWhat are planes and collinear points?In geometry, a plane is a flat, two-dimensional surface that extends infinitely in all directions. It can be thought of as a completely flat and level surface, like a tabletop or a sheet of paper.
Collinear points, on the other hand, are points that lie on the same straight line. If three or more points are collinear, they can be connected by a straight line, and the line they lie on is sometimes called a "collinear line".
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Help asap will give briniest
The frequency of each interval is:
81-100: 2
61-80: 2
1-20: 1
21-40: 1
41-60: 2
What is frequency interval?
Frequency refers to the number of times a particular value or event occurs within a given dataset or sample. In statistics, frequency is used to describe the distribution of values in a dataset, and it is often represented as a frequency table or histogram.
Frequency is often used in conjunction with other statistical measures such as mean, median, and mode to describe the central tendency and variability of a dataset. By analyzing the frequency of values within a dataset, we can identify patterns and trends, and make inferences about the population from which the sample was drawn.
According to the question:
Using the given intervals, we can count the frequency of each interval as follows
81-100: 2 (81, 97)
61-80: 2 (65, 44)
1-20: 1 (2)
21-40: 1 (24)
41-60: 2 (25, 38)
Total: 8
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equation be multiplied? What will be the result after completing the multiplication? 7x+3y=-8 4x-y=-13
65x + 17y = -108 is the result of completing the multiplication 7x+3y=-8 4x-y=-13 of two equations together.
To find the result of multiplying these two equations, we need to use the distributive property. The distributive property states that a(b + c) = ab + ac. In this case, we can distribute the 7 and the 4 across the equations:
7(7x + 3y) = 7(-8)
4(4x - y) = 4(-13)
Simplifying these equations gives us:
49x + 21y = -56
16x - 4y = -52
Now, we can combine like terms:
65x + 17y = -108
This is the result of multiplying the two equations together. We can check our work by plugging in values for x and y and seeing if the equation holds true. For example, if x = 1 and y = 2, then the equation becomes:
65(1) + 17(2) = -108
65 + 34 = -108
99 = -108
This is not true, so we know that our answer is correct.
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2
A geometric sequence is shown below.
Which function describes this sequence?
5, 11, 29, 83, ...
These values match the given sequence, so the function that describes the sequence is:
an = 5(2.2 + 0.8182n)ⁿ⁻¹
What is the meaning of the word "function"?According to one definition, a function is a relationship between a number of inputs where each input has exactly one output.
To find the function that describes the given geometric sequence, we need to find the common ratio r. We can do this by dividing any term in the sequence by the previous term:
11/5 = 2.2
29/11 = 2.63636...
83/29 = 2.86206...
We can see that the common ratio is increasing, which suggests that the sequence is not a perfect geometric sequence. However, the differences between the ratios are getting smaller, so we can approximate the sequence as a geometric sequence with a changing common ratio.
Let's use the first two terms of the sequence to find an initial approximation for the common ratio:
r ≈ 11/5 = 2.2
Then, we can write the nth term of the sequence as:
an = 5(2.2)ⁿ⁻¹
However, we noticed that the common ratio is increasing, so we need to adjust our formula to account for this. Let's try a formula where the common ratio is a linear function of n:
an = 5(2.2 + 0.8182n)ⁿ⁻¹
Plugging in n = 1, 2, 3, and 4, we get:
a1 = 5(2.2 + 0.8182(1))⁰ = 5
a2 = 5(2.2 + 0.8182(2))¹ ≈ 11
a3 = 5(2.2 + 0.8182(3))² ≈ 29
a4 = 5(2.2 + 0.8182(4))³ ≈ 83
These values match the given sequence, so the function that describes the sequence is:
an = 5(2.2 + 0.8182n)ⁿ⁻¹
where n is the index of the term in the sequence.
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NEEDD HELP ASAP WILL MARK BRAINLIST!! Olivia and Abby are donating part of their allowance to charity. Abby is giving $10
less than twice the amount that Olivia is giving. In total, they are donating $125 to
charity. How much money is Abby giving?
$110
$68
$52
$75
$80
$98
Answer:
80
Step-by-step explanation:
45 x 2 = 90
90 - 10 = 80
80 + 45 = 125
Answer:
$80
Step-by-step explanation:
F. Find the domain and the range of the following functions. Write your answers in set builder form. 1) \( f(x)=4 x^{2}-2 x+1 \) 2) \( g(x)=2 x-1 \), where \( x \neq 2 \) 3) \( h(x)=2 x-\sqrt{x+1} \)
The domain and range of the functions in set builder form are:
1) Domain: \(\{x|x\in\mathbb{R}\}\), Range: \(\{y|y\in\mathbb{R}\}\)
2) Domain: \(\{x|x\in\mathbb{R}, x\neq2\}\), Range: \(\{y|y\in\mathbb{R}\}\)
3) Domain: \(\{x|x\in\mathbb{R}, x\geq-1\}\), Range: \(\{y|y\in\mathbb{R}\}\)
The domain and range of a function are the possible values of x and y, respectively, for which the function is defined. We can find the domain and range of the given functions using set builder form, which is a way of describing a set of numbers using an expression.
The function \(f(x)=4x^{2}-2x+1\) is a polynomial function, and the domain of a polynomial function is all real numbers. Therefore, the domain of this function is \(x\in\mathbb{R}\), or in set builder form, \(\{x|x\in\mathbb{R}\}\). The range of this function is also all real numbers, so the range is \(y\in\mathbb{R}\), or in set builder form, \(\{y|y\in\mathbb{R}\}\).
The function \(g(x)=2x-1\) is also a polynomial function, so the domain is all real numbers except for x=2, since the function is undefined at that point. Therefore, the domain of this function is \(x\in\mathbb{R}, x\neq2\), or in set builder form, \(\{x|x\in\mathbb{R}, x\neq2\}\). The range of this function is also all real numbers, so the range is \(y\in\mathbb{R}\), or in set builder form, \(\{y|y\in\mathbb{R}\}\).
The function \(h(x)=2x-\sqrt{x+1}\) is a radical function, and the domain of a radical function is the set of values for which the expression under the radical is greater than or equal to zero. Therefore, the domain of this function is \(x\in\mathbb{R}, x\geq-1\), or in set builder form, \(\{x|x\in\mathbb{R}, x\geq-1\}\). The range of this function is also all real numbers, so the range is \(y\in\mathbb{R}\), or in set builder form, \(\{y|y\in\mathbb{R}\}\).
In conclusion, the domain and range of the functions in set builder form are:
1) Domain: \(\{x|x\in\mathbb{R}\}\), Range: \(\{y|y\in\mathbb{R}\}\)
2) Domain: \(\{x|x\in\mathbb{R}, x\neq2\}\), Range: \(\{y|y\in\mathbb{R}\}\)
3) Domain: \(\{x|x\in\mathbb{R}, x\geq-1\}\), Range: \(\{y|y\in\mathbb{R}\}\)
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A rose garden is formed by joining a rectangle and a semicircle, as shown below. The rectangle is 22ft long and 14ft wide.
Find the area of the garden. Use the value 3.14 for pie , and do not round your answer. Be sure to include the correct unit in your answer.
Step-by-step explanation:
To find the area of the rose garden, we need to find the sum of the areas of the rectangle and the semicircle.
Area of rectangle = length x width = 22 ft x 14 ft = 308 sq ft
Area of semicircle = (1/2) x pi x radius^2, where radius = diameter/2
The diameter of the semicircle is the width of the rectangle, which is 14 ft. So the radius is 7 ft.
Area of semicircle = (1/2) x 3.14 x 7^2 = 3.14 x 24.5 = 77.03 sq ft
Total area of rose garden = area of rectangle + area of semicircle
= 308 sq ft + 77.03 sq ft
= 385.03 sq ft
Therefore, the area of the rose garden is 385.03 square feet.
What is the value of x???