Compute r6r6, l6l6, and m3m3 to estimate the distance traveled over [0, 3] if the velocity at half-second intervals is as follows:

Answers

Answer 1

For R6 and L6, t= (3- 0) / 6= 0.5. For M3, t= (3- 0)/ 3 = 1. Then

For R6 we will add all the velocity given from 12 to 20 and then multiply it by 0.5 seconds

R6 = 0.5 s ( 12 + 18 + 25 + 20 + 14 + 20 ) m/ sec = 0.5 (109) m = 54.5 m,

For L6 we will add all the velocity given from 0 to 14 and then multiply it by 00.5 as well.

L6 = 0.5 sec ( 0 + 12 + 18 + 25 + 20 + 14 ) m/ sec = 0.5 (89 ) m = 44.5 m.

For M3:

M3 = 1 sec (12 + 25 + 14) m/ sec = 51 m.

Answer 2
Final answer:

The question relates to integral calculus and the concept of Riemann sum approximation. The values r6r6, l6l6, and m3m3 need to be calculated given they represent velocities at half-second intervals. The estimated distance travelled would be the sum of these velocities multiplied by their respective time intervals.

Explanation:

The task here is to compute the expressions r6r6, l6l6, and m3m3, and use those to estimate the distance traveled over the interval [0,3], if the velocity changes at half-second intervals. From the details, it is indicative this is a problem involving the mathematical concept of integral calculus, specifically the area under velocity-time curve. The overall distance travelled is given by the area under the curve which is the integral of the velocity function over the given interval.

Let's suppose the values r6r6, l6l6, and m3m3 represent velocities at different half-second intervals of time. In order to estimate the total distance travelled, you would need to sum these velocities and multiply by the duration of each interval (0.5 seconds). This concept is also known as Riemann sum approximation in integral calculus.

For example, if r6r6 = 10 m/s, l6l6 = 12 m/s, and m3m3 = 8 m/s, the estimated total distance travelled would be calculated as (10*0.5 + 12*0.5 + 8*0.5) = 5 m + 6 m + 4 m = 15 m.

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Related Questions

How do I factor 27x^3 -125? The answer is not
(3x+5)(9x^2 -15x+25) or
(3x-5)(9x^2 +10x +25)

Answers

Answer: the first one

Step-by-step explanation:


Divide. 2\3÷4\5 2\8 8\15 5\6 8\8

Answers

 Do you mean the 2/3, 4/5,2/8 etc.are fractions? Or dividing each number? If so for dividing each number the answer is 0.9. For fractions the answer is 7 and 1/2. Hope I helped!

You are saving money to buy a new bicycle that costs $155.75. You have $30 and plan to save $5 each week. Your aunt decides to give you an additional $10 each week. a. How many weeks will you have to save until you have enough money to buy the bicycle? You need to save for how many weeks? b. How many more weeks would you have to save to buy a new bicycle that costs $203.89? You would have to save for how many more weeks?

Answers

Answer:

a). 9 weeks

b). 4 more weeks

Step-by-step explanation:

a). The cost of new bicycle = $155.75

     Amount I have with me   = $30

Therefore remaining amount = 155.75 - 30

                                                 = $ 125.75

Amount I will save in one week = $ 5

Amount my aunt will give me one week  = $ 10

Therefore total amount i will save in one week = 5 + 10

                                                                              = $ 15 in one week

Therefore number of weeks required to collect the remaining amount of $125.75 is  = 125.75 / 15

                   = 8.38 weeks

                  = 9 weeks

Thus 9 weeks are required to save money to buy a bicycle that cost $155.75

b). New cost the bicycle = $ 203.89

    From above at the end of 9 weeks I will have = $ 125.75

    Amount I have with me before = $ 30

   Therefore by the end of 9 weeks I have total amount = 125.75 + 30

                                                                                              = $ 155.75

  Therefore amount less = 203.89 - 155.75

                                         =  $ 48.14

  Number of weeks require to collect the remaining amount of $ 48.14 by saving  $ 15 in one week is = 48.14 / 15

                                             = 3.20 week

                                              = 4 weeks

Thus,  4 more weeks  is required to save money to buy a new bicycle that cost $ 203.89

Final answer:

It will take approximately 9 weeks to save enough money to buy the bicycle. It would take approximately 12 more weeks to save enough money for a bicycle that costs $203.89.

Explanation:

To determine how many weeks it will take to save enough money to buy a bicycle, we can set up an equation:

$30 + ($5 + $10)  imes x = $155.75

Where x represents the number of weeks. Now, we can solve for x:

$30 + $15x = $155.75

$15x = $125.75

x = $125.75 / $15 = 8.38

Since we can't have a fraction of a week, we can round up to the nearest whole number. So, it will take approximately 9 weeks to save enough money.

To determine how many more weeks you would have to save to buy a bicycle that costs $203.89, we can again set up an equation:

$30 + ($5 + $10)  imes x = $203.89

Now, we can solve for x:

$30 + $15x = $203.89

$15x = $173.89

x = $173.89 / $15 = 11.59

Rounding up to the nearest whole number, it would take approximately 12 more weeks to save enough money.

Which relationships would most likely be causal? Check all that apply.

a negative correlation between the temperature and the amount of snow still on the ground
a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left
a positive correlation between the length of the side of a pool and its depth
a positive correlation between the height of a woman and the height of her brother
a negative correlation between the volume of water in a pot and the amount of time that the water takes to boil

Answers

Answer:

a negative correlation between the temperature and the amount of snow still on the ground a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left

Step-by-step explanation:

1. A negative correlation between the temperature and the amount of snow still on the ground


This is casual since temperature and amount of snow are inversely proportional to each other.

2. A negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left


This is casual since the number of digital photos uploaded and the amount of storage space are  inversely proportional to each other.

3. A positive correlation between the length of the side of a pool and its depth

.

This is not casual since the length of the side of a pool and its depth  are not related.

4. A positive correlation between the height of a woman and the height of her brother

.

This is not casual since the height of a woman and the height of her brother  are not related.

5. A negative correlation between the volume of water in a pot and the amount of time that the water takes to boil

This is not casual since the volume of water in a pot and the amount of time that the water takes to boil are directly proportional.

A relationships would most likely be causal,

a negative correlation between the temperature and the amount of snow still on the ground.

a negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left

1. A negative correlation between the temperature and the amount of snow still on the ground

This is casual since temperature and amount of snow are inversely proportional to each other.

2. A negative correlation between the number of digital photos uploaded to a website and the amount of storage space that is left

This is casual since the number of digital photos uploaded and the

What is the relation of correlation?

amount of storage space is inversely proportional to each other.

3. A positive correlation between the length of the side of a pool and its depth

This is not casual since the length of the side of a pool and its depth are not related.

4. A positive correlation between the height of a woman and the height of her brother

This is not casual since the height of a woman and the height of her brother are not related.

5. A negative correlation between the volume of water in a pot and the amount of time that the water takes to boil

This is not casual since the volume of water in a pot and the amount of time that the water takes to boil are directly proportional.

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how does $4.30 relate 4.3

Answers

These both represent the same number.
In $4.30 or just 4.30, the zero does not have any number after it, so it doesn't need to be there as a placeholder. When you take away the zero, it's just 4.3.
JE NE SAIS PAS COMMENT ON VA FAIRE POUR ALLER À LONDRES

The special mix contains 5/6 pound of dried chicken, 2/3 pound of dried bison, and 1/2 pound of dried vegetables.
How many pounds of special mix does Max get? Explain how you found your answer.


Answers

First find a common denominator

5/6
1/2 = 3/6
2/3 = 4/6

Then add all of them together.
5/6 + 3/6 + 4/6  = 12/6

12/6 = 2

2 pounds is your answer

hope this helps

total pounds

to add, find a common deonmenator (bottom numbers)

the denomenantors are 6,3,2

the common denominator is 6 because 6*1=6, 3*2=6, 2*3=6


multiply each by 1 or a/a where a=a to make the common denomenators so we can add

remember that [tex]\frac{a}{b}+\frac{c}{b}=\frac{a+c}{b}[/tex]

5/6 times 1/1=5/6

2/3 times 2/2=4/6

1/2 times 3/3=3/6

so

[tex]\frac{5}{6}+\frac{2}{3}+\frac{1}{2}=[/tex]

[tex]\frac{5}[6}+\frac{4}[6}+\frac{3}{6}=[/tex]

[tex]\frac{5+4+3}{6}=[/tex]

[tex]\frac{12}{6}=[/tex]

[tex]2[/tex]

2 pounds total of special mix

I found my answer using maths

Find the unknown length for the triangle

Answers

unknown length = 18/12 = 1.5

answer
A.  1.5 ft
Area for a triangle = (b*h)/2
h=12, b is unknown
so b*12/2=18(your total area)

12b/2=18 (times by 2 to isolate b)

12b=36 (divide by 12 to isolate b)

unknown length b=3

what is the principal or(postive)square root of a number N

Answers

The square root of number n is a number, r, that when squared equals n.
Each positive number has two square roots, a positive one and a negative one. The principal square root of a positive number is the positive square root.

For example, this of n = 4.
There are two numbers, r, that when squared equal 4.
The are 2 and -2, since 2^2 = 4 and (-2)^2 = 4.
4 has two square roots, a positive one and a negative one.
The positive square root, 2, is the principal square root of 4.

The symbol for the principal square root is the square root symbol.

[tex] \sqrt{4} [/tex]

means the principal square root of 4, which is 2.

If you mean the negative square root of 4, which is -2, then you must write a negative sign before the square root symbol.

[tex] -\sqrt{4} [/tex]

means the negative square root of 4 which is -2.

B) suppose the average fisherman can catch 200,000 pounds of bluefin tuna every year (100 tons). what is the value of a bluefin tuna fishing license?

Answers

Final answer:

The value of a bluefin tuna fishing license depends on the price of bluefin tuna and the annual catch limit. The value can be significant, given the potential income of $650,000 per year from tuna fishing. However, it represents a balance between profit and sustainable fishing practices.

Explanation:

The value of a bluefin tuna fishing license mostly depends on the price of bluefin tuna. Given that the price is $3.25 per pound and the average fisherman can catch 200,000 pounds (100 tons) per year, a fisherman could potentially earn $650,000 from tuna fishing annually. This suggests that the value of a fishing license may be quite high. However, the exact cost of the license is determined by several factors, including regulations, environmental impacts (often referred to as a 'tragedy of the commons' scenario), and maintaining a sustainable fishing industry.

Fisheries supposedly operate by established catch limits to prevent decimating the bluefin tuna population, meaning they are restricted in how much fish they can catch. Thus, the value of a fishing license also includes the advantage of sustainable fishing practices, ensuring the bluefin tuna's availability for future generations.

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Alistar has 5 half-pound chocolate bars. it takes 1 1/2 pounds of chocolate, brockem into chunks, to make a batch of cookies How many batches can Alsiter make with the chocolate he has?

Answers

One.


More precisely, one and two-thirds. It takes three half-pound chocolate bars to produce one batch at that rate, and he'd have two left over to make a smaller batch, but I assume you're asking for the total number of whole batches he could bake.
Answer: one


I hope this helps and have a wonderful day filled with joy!!

Aiko started jump rope for an amazing 20 minutes, she stopped at 8;05.When did she start jumping

Answers

Just count 20 minutes back from 08:05

08:05 - 00:20 =
07:45

Final answer:

Aiko started jumping rope at 7:45, which is calculated by subtracting the 20-minute jump rope activity duration from the time she stopped at 8:05.

Explanation:

To solve this problem, we need to subtract the duration of Aiko's jump rope activity from the time she stopped. We know that Aiko stopped jumping rope at 8:05 and the duration of her jump rope activity was 20 minutes.

Since Aiko's activity lasted 20 minutes and she ended at 8:05, we need to subtract 20 minutes from 8:05 to find out when she started. Thus, Aiko started jumping rope at 7:45.

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Find the value of x. Round your answer to the nearest tenth. Show your work please!

Answers

To find x we can use that fact that x is in the adjacent side of the 22° angle. We also know that 11 is our hypotenuse. Now, we can use trigonometry to find x.

cos(Ф)=adjacent/hypotenuse
cos(22°)=x/11
11 · cos(22°)= x/11 · 11    multiplicative inverse
11 cos (22°)=x
10.2≈x

The model represents an equation. What value of x makes the equation true?

A)
15
4


B)
15
8


C)

15
4


D)

15
8

Answers

Final answer is...... positive 15/8

Answer:

The correct option is B.

Step-by-step explanation:

In the given diagram, we have 6 boxes of -x and 6 box of 1 on the left hand side. It means,

[tex]LHS=6(-x)+6(1)=-6x+6[/tex]

We have 2 boxes of x and 9 box of -1 on the right hand side. It means,

[tex]RHS=2(x)+9(-1)=2x-9[/tex]

So, the equation represented by the given diagram is

[tex]-6x+6=2x-9[/tex]

[tex]-6x-2x=-9-6[/tex]

[tex]-8x=-15[/tex]

Dived both sides by -8.

[tex]x=\frac{-15}{-8}[/tex]

[tex]x=\frac{15}{8}[/tex]

The value of x is [tex]\frac{15}{8}[/tex]

Therefore the correct option is B.

Distributive property to express 28 + 42

Answers

Okay. So, a good number that 28 and 42 is divisible by is 7. A distributive property problem to express 28 + 42 is 7(4 + 6).
the numbers 28 and 42 are both divisible by 7, so divide both numbers by 7
28/7 = 4               42/7 = 6
this means that 7(4 + 6) = 28 + 42
Lets check it!
(7 times 4) + (7 times 6) =
28 + 42

Yep! it works! your answer is 7(4+6)
I hope this helps!!

What is the product of 5.1 × 10–8 and 0.07?

Answers

5.1 × 10-8 and 0.07 = 43.07
Hopes this helps. Please mark me as Brainliest. 

Functions. Find the domain

Need help with one or both problems if possible.

10 points!!

Answers

The first one is [-3,2) ∪ (2,∞) and/or {x|x≥-3,≠2}

The second one is (∞,-∞) and/or {x|x ∈ R} 

-
I have a feeling that they're both wrong since im learning this, but I hope I did help you ^.^

Solve. Alex borrowed $12.50 from his friend Danilo. He paid him back $8.75. How much does he still owe?

Answers

he should still owe $3.75

Find the jacobian of the transformation. x = u2 + uv, y = uv2

Answers

Final answer:

To find the Jacobian of the given transformation, we need to compute the partial derivatives of x and y with respect to u and v. The Jacobian matrix is a matrix that represents these partial derivatives.

Explanation:

To find the Jacobian of the transformation x = u^2 + uv and y = uv^2, we need to compute the partial derivatives of x and y with respect to u and v. Let's start with the partial derivative of x:

∂x/∂u = 2u + v

Now let's find the partial derivative of x with respect to v:

∂x/∂v = u

Using the same process, we can find the partial derivatives of y:

∂y/∂u = v^2

∂y/∂v = 2uv

Putting it all together, the Jacobian matrix is:

J(u, v) = [∂x/∂u, ∂x/∂v; ∂y/∂u, ∂y/∂v]

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The Jacobian of the transformation is [tex]\( uv(4u + v) \)[/tex].

The Jacobian of the transformation given by [tex]\( x = u^2 + uv \) and \( y = uv^2 \)[/tex] is determined by finding the determinant of the matrix of partial derivatives. The matrix of partial derivatives, known as the Jacobian matrix, is given by: [tex]J = \begin{bmatrix} \frac{\partial x}{\partial u} \frac{\partial x}{\partial v} \\ \frac{\partial y}{\partial u} \frac{\partial y}{\partial v} \end{bmatrix}[/tex]

We calculate each of the partial derivatives:

 [tex]\frac{\partial x}{\partial u} = \frac{\partial}{\partial u}(u^2 + uv) = 2u + v[/tex]

[tex]\frac{\partial x}{\partial v} = \frac{\partial}{\partial v}(u^2 + uv) = u[/tex]

[tex]\frac{\partial y}{\partial u} = \frac{\partial}{\partial u}(uv^2) = v^2[/tex]

[tex]\frac{\partial y}{\partial v} = \frac{\partial}{\partial v}(uv^2) = 2uv[/tex]

Now we can construct the Jacobian matrix: [tex]J = \begin{bmatrix} 2u + v u \\ v^2 2uv \end{bmatrix}[/tex]

The determinant of this matrix gives us the Jacobian of the transformation:

[tex]\text{Jacobian} = \text{det}(J) = (2u + v)(2uv) - (u)(v^2)[/tex]

[tex]\text{Jacobian} = 4u^2v + 2uv^2 - uv^2[/tex]

[tex]\text{Jacobian} = 4u^2v + uv^2[/tex]

[tex]\text{Jacobian} = uv(4u + v)[/tex]

Therefore, the Jacobian of the transformation is [tex]\( uv(4u + v) \).[/tex]

Solve for x.

6x−24=x−2

Answers

6x - 24 = x - 2
6x - x = -2 + 24
5x = 22
x = 22/5 or 4 2/5 <==
6x - 24 = x - 2
-x          - x                      
______________
5x - 24 =   -2
    +24 = +24
______________
5x = 22
________________
x = 22/5
________________
x = 4.4

What is the equation of a line with a slope of ​3​ and a point
(3, 1) on the line?
Express the equation in the form of
y=mx+b where m is the slope and b is the y-intercept.

Answers

Answer: y = 3x-8

------------------------------------------------
------------------------------------------------

Explanation:

The slope is 3, so m = 3

The given point is (3,1) meaning x = 3 and y = 1. The x coordinate is always listed first in an ordered pair. The general format is (x,y)

We'll use m = 3, x = 3 and y = 1 to find the y intercept

y = mx+b
y = m*x+b
1 = 3*3+b ... plug in m = 3, x = 3 and y = 1
1 = 9+b
1-9 = 9+b-9 ... subtract 9 from both sides
-8 = b
b = -8

----------------

So we're given m = 3 as the slope and we just found that b = -8 is the y intercept

So y = mx+b updates to y = 3x-8. This is the final answer.

----------------

Side Notes:
* The slope of 3 means rise/run = 3/1 indicating each time we go up 3, we move to the right 1
* The y intercept -8 is the location on the vertical y axis numberline where the graph crosses. The point (0,-8) is on this line.

15 3/4% is equal to which decimal?

A- 0.1575
B- 157.25
C-15.25
D- 15.34

Answers

15 3/4% = 15.75%
15.75% = 0.1575
The answer is A.
The only one that would make sense is: A.

At his comic book store, Korey’s Comics, Korey sells approximately $3,250 in comic books each month. But as a comic book dealer, Korey only pays $1,285 for these comic books. Korey’s monthly operating expenses, including labor, are $875. Calculate Korey’s monthly net income.
a. $1,090
b. $1,965
c. $2,375
d. $2,840

Answers

Answer:

(A) $1,090

Step-by-step explanation:

We will see that the net income at the comic store is $1,090, so the correct option is a.

What is Korey's net income?

The net income will be the difference between how much money enters the store and how much he needs to pay.

We know that each month he gets $3,250.

And he must pay $1,285 for the comics and $875 in expenses, so the net income is:

N = $3,250 - $1,285 - $875 = $1,090

We conclude that the net income is $1,090, so the correct option is a.

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What is the answer to this question ?

Answers

x²-6x+8=0
x²-2x-4x+8=0
x(x-2)-4(x-2)=0
(x-4)(x-2)=0
x=4 or 2

If Joyce reads 1/6 of her book on Monday 2/5 of it one Tuesday and 1/3 of her book on Wednesday how much of her book did she’s read?

Answers

To answer this we need to get the same denominator for each. So we need to find a LCD. I think 30.
Then we change them all to have a denominator of 30
1/6=5/30
2/5=12/30
1/3=10/30
Add it up 10+12+5=27
so 27/30
But than can be simplified
Divide by 3 on the top and bottom
9/10
She has read 9/10 of her book
Hope this helps! :)

Final answer:

Joyce read 1/6 of her book on Monday, 2/5 on Tuesday, and 1/3 on Wednesday. After converting to a common denominator and adding the fractions, she read 27/30 of her book, which simplifies to 9/10 or 90% of her book in total.

Explanation:

To find out how much of her book Joyce has read over three days, we need to add up the fractions of the book she read each day.

On Monday, Joyce reads 1/6 of her book.On Tuesday, she reads 2/5 of her book.On Wednesday, Joyce reads 1/3 of her book.

To calculate the total, we can first find a common denominator for the fractions, which in this case is 30. We then convert each fraction and sum them up:

Convert 1/6 to 5/30 by multiplying both the numerator and the denominator by 5.Convert 2/5 to 12/30 by multiplying both the numerator and the denominator by 6.Convert 1/3 to 10/30 by multiplying both the numerator and the denominator by 10.Add the converted fractions: 5/30 + 12/30 + 10/30 = 27/30.

After adding the fractions, we find that Joyce has read 27/30 of her book over the three days, which can be simplified to 9/10 if we divide both the numerator and the denominator by 3.

Therefore, Joyce has read 90% of her book by the end of Wednesday.

Chuanxi planned a rectangular sidewalk with a length of 21 ft. He made a scale drawing using a scale factor of 1 in. = 7 ft. He decided to change the length of the actual sidewalk to 27 ft. If the scale drawing still has a length of 3 in., what does 1 in. represent in the new scale?

Answers

Original Ratio of 1 in = 7 ft so 3 in = 21 ft
Now, New ratio 1 in = x ft so 3 in = 27ft

1/x = 3/27

cross multiply a/b = c/d ad = bc
1/x = 3/27
3x = 27
x = 9

1 in represents 9 ft

The unit is converted in new scale as 1 inch is equal to 9 feet.

What is unit conversion?

Conversion of units is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors.

For the given situation,

A rectangular sidewalk has a length = 21 feet

Scale factor, 1 inch = 7 feet.

So, 21 feet = [tex]\frac{21}{7}[/tex]

⇒ [tex]3[/tex] inches

The length of the actual side walk changes to 27 feet.

The length of actual side walk in inches = 3 inches.

Now, 1 inch = [tex]\frac{27}{3}[/tex]

⇒ [tex]1 inch = 9 feet[/tex]

Hence we can conclude that the unit is converted in new scale as 1 inch is equal to 9 feet.

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A distance runner is running an 18-mile race. So far, he has run 43% of the race.

Which would be the best way to estimate the number of miles the runner has run so far?
Find 40% of 10.
Find 40% of 20.
Find 50% of 10.
Find 50% of 20

Answers

best estimate find 40% of 20

Answer:

40% of 20

Step-by-step explanation:

Which function in vertex form is equivalent to f(x) = x2 + 8 – 16x?
A. f(x) = (x – 8)2 – 56
B. f(x) = (x – 4)2 + 0
C. f(x) = (x + 8)2 – 72
D.f(x) = (x + 4)2 – 32

Answers

The answer would be (f(x) = (x – 8)2 – 56)

Answer: The correct option is A.

Explanation:

The given function is,

[tex]f(x)=x^2+8-16x[/tex]

Rewrite the above function.

[tex]f(x)=(x^2-16x)+8[/tex]

To make the perfect square we add and subtract the square of [tex]\frac{b}{2a}[/tex], where b is coefficient of x and a is the coefficient of [tex]x^2[/tex].

Since a=1 and b = -16, So we will add and subtract he square of -8.

[tex]f(x)=(x^2-16x+(-8)^2)+8-(-8)^2[/tex]

[tex]f(x)=(x^2-16x+(8)^2)+8-64[/tex]

Using [tex](a-b)^2=a^2-2ab+b^2[/tex]

[tex]f(x)=(x-8)^2)-56[/tex]

Therefore, the correct option is A.

simon used 3 pears and 9 apples to make a salad. what was the ratio of the number of pears to the number of apples in the salad?

Answers

3:9 You may be asking "THAT'S IT?" but yeah thats all you have to do. Not for all problems thought
The ratio is 3 pears to 9 apples

what is twice the sum of -2 and a number is the same as the number decreased by 7/2

Answers

Sent a pic of the solution (s).

1/2 is twice the sum of -2 and a number is the same as the number decreased by 7/2.

Given that we need to find the sum of -2 and a number is the same as the number decreased by 7/2.

Let's break down the problem and solve it step by step.

The problem states that twice the sum of -2 and a number is the same as the number decreased by 7/2.

Step 1: Assign a variable to the unknown number.

Let's say the unknown number is "x".

Step 2: Write the equation based on the given information.

Twice the sum of -2 and the unknown number is the same as the number decreased by 7/2.

This can be written as:

2(-2 + x) = x - 7/2

Step 3: Simplify the equation.

Multiply 2 by each term inside the parentheses:

-4 + 2x = x - 7/2

Step 4: Isolate the variable on one side of the equation.

To do this, we can subtract x from both sides of the equation:

-4 + 2x - x = x - 7/2 - x

Simplifying:

-4 + x = -7/2

To solve for x, we need to isolate it on one side of the equation.

We can do this by adding 4 to both sides:

-4 + 4 + x = -7/2 + 4

Simplifying:

x = 1/2

Therefore, the unknown number is 1/2.

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A farmer wants to make a rectangular field with a total area of 800m2. It is surrounded by a fence. It is divided into 3 equal areas by fences. What is the shortest total length of fence with which this can be done?

Answers

Final answer:

To find the shortest total length of fence needed, divide the field into 3 equal areas. Use the area formula and differentiate to find the value of L that minimizes the perimeter. The shortest total length of fence needed is approximately 64.26m.

Explanation:

To find the shortest total length of fence needed, we need to divide the field into 3 equal areas. Since the total area is 800m², each area will be 800m² ÷ 3 = 266.67m².

Now, let's find the dimensions of each area. Let the length of the rectangle be L and the width be W.

Since the areas are equal, we have LW = 266.67m². We are also given that the field is rectangular, so the perimeter is given by 2L + 2W.

To minimize the perimeter, we can use the formula 2L + 2W = P, and solve for L or W. Using the area formula and substituting, we have 2L + 2(266.67m²/L) = P.

Differentiating with respect to L and equating to zero, we can find the value of L that minimizes the perimeter. Solving the equation gives L ≈ 15.65m.

Therefore, the shortest total length of fence needed is approximately 2L + 2W ≈ 2(15.65m) + 2(266.67m²/15.65m) ≈ 64.26m.

For a rectangular field with a total area of 800 m², divided into three equal areas, the optimal solution is a square field with a side length of approximately 28.28 m. The shortest total length of fence needed is approximately 113.14 m.

Let's go through the step-by-step calculation:

1. **Given Information:**

  - Total area of the rectangular field: [tex]\(800 \, \text{m}^2\).[/tex]

  - The field is divided into 3 equal areas.

2. **Calculate the area of each section:**

  [tex]\[ \text{Area of each section} = \frac{\text{Total area}}{\text{Number of sections}} = \frac{800 \, \text{m}^2}{3} \approx 266.67 \, \text{m}^2 \][/tex]

3. **Assume a square field:**

  Let [tex]\(a\)[/tex] be the side length of the square field.

4. **Express the total area in terms of side length [tex](\(a\))[/tex]:**

  [tex]\[ a^2 = 800 \, \text{m}^2 \][/tex]

5. **Calculate the side length [tex](\(a\))[/tex] :**

  [tex]\[ a = \sqrt{800} \approx 28.28 \, \text{m} \][/tex]

6. **Calculate the total length of the fence (perimeter of the square):**

  [tex]\[ \text{Perimeter} = 4a = 4 \times 28.28 \, \text{m} \approx 113.14 \, \text{m} \][/tex]

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