Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 420 centimeters and the width is 30 centimeters less than the length.

Answers

Answer 1

Step-by-step explanation:

Let;

perimeter = 420cm

L = length

w = width

perimeter of rectangle = 2l +2w

420= 2l + 2w

but;

width = L - 30cm ( 30 cm less than length)

420cm = 2L + 2( L - 30cm)

420cm = 2L + 2L -60cm

420cm + 60cm = 2L + 2 L

480 Cm = 4L

L = 480cm ÷ 4

L = 120 cm

therefore, the length is 120 cm and width,

(L - 30cm)

= 120cm - 30cm

= 90cm

Therefore the width is also 90cm


Related Questions

Anita plans to cover a solid cone with construction paper for a science project. The cone has a diameter of 11 inches and a slant height of 28.5 inches. How many square inches of paper will she need to cover the entire cone? (Use 3.14 for Pi and round to the nearest hundredth. Recall the formula S A = pi r l + pi r squared.) 492.20 in.2 587.18 in.2 982.82 in.2 984..39 in.2

Answers

Answer:

587.18 in²

Step-by-step explanation:

In the above question, we are given the following values

Diameter = 11 inches

Radius = Diameter/2 = 11 inches/2 = 5.5 inches

Slant height = 28.5 inches.

We were asked to find how many square inches of paper will she need to cover the ENTIRE cone.

To solve for this, we would use formula for Total Surface Area of a Cone

Total Surface Area of a Cone = πrl + πr²

= πr(r + l)

Using 3.14 for π

Total Surface Area of a Cone

= 3.14 × 5.5( 5.5 + 28.5)

= 3.14 × 5.5 × (34)

= 587.18 in²

Therefore, Anita will need 587.18 square inches of paper to cover the entire cone.

Answer:

B

Step-by-step explanation: Just trust me bro

Kevin bought 5 tickets to a concert for $115. How much will it cost for 8 tickets to the concert if all tickets have the same unit price? Use the table below to help determine the missing value:

Answers

Answer: $920

Step-by-step explanation:  

$115x8=$920 which is the total cost of eight tickets

First divided five from 115 and then the answer I got was 23 then I multiplied it by 23 and then I got 184 and so, Eight tickets cost $180

I need help. What does n equal.
\(5n^{2}=7n-2\)

Answers

Answer:

\(\boxed{\sf n= \dfrac{2}{5} ,\: n=1}\)

Step-by-step explanation:

\(\rightarrow 5n^2 = 7n -2\)

\(\rightarrow 5n^2 - 7n +2=0\)

\(\rightarrow 5n^2 - 5n -2n+2=0\)

\(\rightarrow 5n(n - 1) -2(n-1)=0\)

\(\rightarrow (5n-2)(n-1)=0\)

\(\rightarrow 5n-2= 0,\: n-1=0\)

\(\rightarrow 5n= 2,\: n=1\)

\(\rightarrow n= \dfrac{2}{5} ,\: n=1\)

\(\pmb{ n= \dfrac{2}{5} \:or~ n=1}\)

Step-by-step explanation:

\(\hookrightarrow\sf{5n^2 = 7n -2}\\\\\hookrightarrow\sf{5n^2 - 7n +2=0}\\\\\hookrightarrow\sf{5n^2 - (5+2)n +2=0}\\\\\hookrightarrow\sf{5n^2 - 5n -2n+2=0}\\\\\hookrightarrow\sf{ 5n(n - 1) -2(n-1)=0}\\\\\hookrightarrow\sf{ (5n-2)(n-1)=0}\\\\\hookrightarrow\sf{ 5n-2= 0\:or~ n-1=0}\\\\\hookrightarrow\sf{ 5n= 2\:or~n=1}\\\\\hookrightarrow\bold{ n= \dfrac{2}{5} \:or~ n=1}\)

The community center is making a circular garden that will be 18 feet across. They want to fill it with 1 foot of potting soil. How much potting soil
should be ordered?

Answers

Answer:

64lbs of soil

Step-by-step explanation:

i had this question before and got it right hopess this helps :)

Can someone solve this for me?

Can someone solve this for me?

Answers

Answer:

x = 19

x + 9 = 28

7x = 133

Step-by-step explanation:

TIME REMAIN 56:07 What method can be used to write the equation of a line in slope-intercept form given two points? Find the slono uning​

Answers

Step-by-step explanation:

1. Pick two points on the line and use them to find the slope.

2. Then, find the coordinates of the y-intercept.

3. The y- coordinate is the value of b in the equation.

Answer:

Step-by-step explanation:

First find the slope of the line.

If the 2 points are (x1, y1) and (x2, y2) then the slope is (y2-y1)/(x2-x1).

Then we can use the point-slope form of the equation of the line:

y - y1 = m(x - x1)  where m = the slope and by substituting the point (x1, y1) we can  convert the equation to slope intercept form ( which is y = mx + b).

Example:

Find slope-intercept equation for the line joining  the points (1, 0) and (3, 4):

The slope = (4 - 0)/(3 - 1) = 4/2 = 2.

Now we plug in the slope m and the point (3, 4) into  y - y1 = m(x - x1):

y - 4 = 2(x - 3)       (Note we can use (1, 0) OR (3, 4) as they are both on line).

y - 4 = 2x - 6

y = 2x - 6 + 4

y = 2x - 2 which is slope-intercept form.

problem 1 (100 points) fig. 1 depicts a sample power system. suppose the three units are always running, with the following characteristics: unit 1: pmin

Answers

The total cost of power generation for a specific load demand can be calculated by optimally allocating the load demand to each unit based on their power output limits. The allocation is done in a way that minimizes the overall cost while meeting the load demand.

In the given power system depicted in Figure 1, there are three units that are always running. Each unit has specific characteristics regarding their minimum power output (Pmin), maximum power output (Pmax), and incremental cost (Ci). Let's discuss the characteristics of each unit and calculate the total cost of power generation for a given load demand.

Unit 1:

Pmin = 200 MW

Pmax = 500 MW

Ci = $50/MWh

Unit 2:

Pmin = 150 MW

Pmax = 400 MW

Ci = $40/MWh

Unit 3:

Pmin = 100 MW

Pmax = 300 MW

Ci = $30/MWh

To calculate the total cost of power generation for a given load demand, we need to determine the optimal power output for each unit. We start by considering the units with the lowest incremental cost first.

Suppose the load demand is D MW. We allocate the load demand to the units as follows:

Step 1: Check if Unit 1 can meet the load demand within its power range. If yes, allocate the load demand to Unit 1 and calculate the cost:

Cost1 = Ci * P1, where P1 is the power output of Unit 1.

Step 2: If there is still remaining load demand, allocate it to Unit 2:

Cost2 = Ci * P2, where P2 is the power output of Unit 2.

Step 3: If there is still remaining load demand, allocate it to Unit 3:

Cost3 = Ci * P3, where P3 is the power output of Unit 3.

Finally, the total cost of power generation, Cost_total, is the sum of Cost1, Cost2, and Cost3:

Cost_total = Cost1 + Cost2 + Cost3

To find the optimal power output for each unit, we consider the load demand and compare it to the minimum and maximum power output limits for each unit. The power allocation is based on meeting the load demand while minimizing the overall cost of power generation.

In summary, given the characteristics of the three units in the power system (Pmin, Pmax, and Ci), the total cost of power generation for a specific load demand can be calculated by optimally allocating the load demand to each unit based on their power output limits. The allocation is done in a way that minimizes the overall cost while meeting the load demand.

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68 seats in 4 rows =
seats per row

Answers

Answer:

17 seats per row

Step-by-step explanation:

We Know

68 seats in 4 rows

How many seats per row?

We Take

68 ÷ 4 = 17 seats per row

So, there are 17 seats per row.

The answer is:

17

Work/explanation:

Find the number of seats per row by dividing the number of seats in all 4 rows by the number of rows:

\(\sf{68\div4=17}\)

There are 17 seats per row.

Therefore, the answer is 17.

Malcolm and his father want to build a frame for their favorite poster. What strategy could they use to find out how much framing material they will need?

Malcolm and his father want to build a frame for their favorite poster. What strategy could they use

Answers

The strategy to use to find out how much framing material they will need is d. Cover the poster with square-inch grid paper to find the area

Why is Option D correct?

Cover the poster with square-inch grid paper to find the area - This method would give the total number of square inches of the poster and would be a good starting point for determining the size of the frame required.

The recommended strategy would be to measure the poster in inches with a ruler to determine the dimensions, then use that information to calculate the total area. This would be a good starting point for determining the size of the frame required.

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What is the answer to 20= 16-
b
-
5

Answers

Answer:

Step-by-step explanation:

20=16−b−15

20=1−b

b= -19

Answer:

-9

Use papa math for all your hard equations (not sponsored)

Does anyone know this? If you do can you please help me?

Does anyone know this? If you do can you please help me?

Answers

Answer:

-2x > 30x < -15

Step-by-step explanation:

A product is formed by multiplying the factors. Here, you want the product of -2 and x, so that is indicated as ...

  -2x

You want that product greater than 30. The symbol for "greater than" is >, so you have ...

  -2x > 30 . . . . the desired inequality

__

The most straightforward way to solve this is to divide by the coefficient of x. Because that is negative, you must reverse the inequality symbol from "greater than" to "less than."

  x < 30/(-2)

  x < -15 . . . . . . the desired solution

_____

Additional comment

It may not be clear why multiplying or dividing an inequality causes the symbol to be reversed. You can think of it as reflecting the inequality over the point x=0 on the number line. Where larger numbers were on the right, they get reflected to points farther left, so as negative numbers, they are smaller numbers.

Consider ...

  1 < 2

  -1 > -2

x plus 2.7 is greater than or equal to 9.4

Answers

Answer:

X >= 6.7

Step-by-step explanation:

So first of all, what you need is write out the equation from the given prompt

x + 2.7 >= 9.4
Next, what you really want to do is

Subtract 2.7 both side
x >= 9.4 - 2.7
x >= 6.7

exercise 15.6. an ant colony has a population size of 4, 000 ants and is increasing at a rate of 3% per week. how long will it take until the ant population has doubled?

Answers

The ant population will double in approximately 24 weeks, or 6 months. This can be found using exponential growth formula.

To find the time it takes for the ant population to double we can use the formula for exponential growth: A = A0 * e^(rt), where A is the population at a given time t, A0 is the initial population, r is the growth rate, and e is the mathematical constant approximately equal to 2.718.

In this case, we have A0 = 4,000, r = 0.03 (since the population is increasing at a rate of 3% per week), and we want to find the value of t when A = 8,000 (since we want to know when the population has doubled). Plugging these values into the formula, we get:

8,000 = 4,000 * e^(0.03t)

Dividing both sides by 4,000 and taking the natural logarithm of both sides, we get:

ln(2) = 0.03t

Solving for t, we get:

t = ln(2) / 0.03

Using a calculator, we find that t is approximately 23.1 weeks. Rounded to the nearest week, this is 24 weeks. Therefore, it will take approximately 24 weeks, or 6 months, for the ant population to double.

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To enlarge or reduce a shape you must:

Answers

To enlarge or reduce any shape you must begin by working out the scale factor, this is calculated by using the following formula: For an enlargement = large number ÷ small number For a reduction = small number ÷ large number

Which of the equations below will answer the following question? Select all that apply. Explain your answers.

I think of a number, add 7 and then multiply by 4. My answer is 80. What was my number?

x + 28 = 80
4(x+7) = 80
4x + 7 = 80
4x + 28 = 80

Answers

The 2nd one (look at photo)
Which of the equations below will answer the following question? Select all that apply. Explain your

(-3 2/3)^2 (thast 3 and 2 thirds btw)

Answers

Hey there! :)

Answer:

\(\frac{121}{9}\)

Step-by-step explanation:

We can solve this by first converting -3 2/3 to an improper fraction:

\(-3\frac{2}{3} = \frac{-11}{3}\)

Square the fraction:

\((\frac{-11}{3})^{2} = (\frac{-11}{3}) * (\frac{-11}{3}) = \frac{121}{9}\)

do you think that for every positive integer n there is a circle in the plane which contains exactly n lattice points in its interior?

Answers

Yes , it is possible that t for every positive integer n there is a circle in the plane which contains exactly n lattice points in its interior

A lattice point may be defined as the point of intersection of two grid lines or more than two grid lines that is placed in a regularly spaced points arrays. This is called a lattice point.

A formal power series that encodes the coefficients of a sequence of numbers is a generating function.

Here, the coefficients of the sequence {Sₙ} are encoded by the generating function S(x). where Sₙ is the number of lattice paths as described above.

Here we will use the fact that the generating function for a sequence satisfies a functional equation that relates the generating function to the sequence itself to prove that 1 + (x – 1)S(x) + xS(x)² = 0,

Here, the functional equation is

S(x) = 1 + xS(x) + xS(x)²

This equation implies that

The term 1 on the right-hand side corresponds to the fact that to reach the point (0,0) (the starting point), there is exactly one way which is to stay at the starting point.

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Can someone answer this please

Can someone answer this please

Answers

Answer:

V=1080

Step-by-step explanation:

It's simple enough.  Just do LxWxH! :D

\((12)(15)(6)\)

\((12)(90)\)

\(1080\)

Look at △ABC and △DEF on this coordinate grid.



Which transformation shows that △ABC and △DEF are similar?

A
a dilation of △ABC with a scale factor of 2

B
a translation of △ABC 1 unit up and 3 units to the right

C
a dilation of △ABC with a scale factor of 12

D
a translation of △ABC 3 units up and 3 units to the right

Look at ABC and DEF on this coordinate grid.Which transformation shows that ABC and DEF are similar?A

Answers

Answer:

A

Step-by-step explanation

Dilation: A shape is scaled up or down by a scale factor

Translation: A shape is moved on a coordinate plane to a different spot.

A works because lets you one side (the bottom side). The bottom has a length of 3, and the bigger one has a length of 6, showing a scale factor of 2.

Here is the graph of the function y = f(x).

Graph the function \(y=\frac{1}{3} f(x-4)-2\)

Here is the graph of the function y = f(x).Graph the function [tex]y=\frac{1}{3} f(x-4)-2[/tex]

Answers

Answer:

See attached graph

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

The graph of f(x) shows the vertex at (3, 2)

Its equation isf(x) = (x - 3)² + 2

The function g(x) = 1/3f(x - 4) - 2 isg(x) = 1/3[(x - 3 - 4)² + 2] - 2 = 1/3[(x - 7)² + 2] - 2 =1/3(x - 7)² + 2/3 - 2 =1/3(x - 7)² - 4/3
Here is the graph of the function y = f(x).Graph the function [tex]y=\frac{1}{3} f(x-4)-2[/tex]

How do you decide if a decimal is a rational​ number?

Answers

you decide if it has a pattern if it is a repeating pattern then it is a rational number decimal however if it a decimal with no pattern it is irrational

Here are the statements

Here are the statements

Answers

Answer:

Step-by-step explanation:

the answer is c

What is the solution of Vx2+49 = x+5?
0 x = 12
12.
5
12.
X=-
5
x = -6 or x=-3
no solution

Answers

x= -6 is the correct answer

Please help please!!!!!!!!!!!!!!

Please help please!!!!!!!!!!!!!!

Answers

Answer:

the last one

Step-by-step explanation:

Sometimes outliers can have a significant effect on statistics, and sometimes they don’t. Use the following distribution to determine which statistics are affected by outliers. Round to the nearest hundredth.

2, 4, 5, 7, 8

Find the median of the distribution. fill in the blank 1

Find the mean of the distribution. fill in the blank 2

Find the standard deviation of the distribution. fill in the blank 3

Make a new distribution consisting of the same first four numbers, but change the 8 to 800. Find the mean, median, and standard deviation.

Mean fill in the blank 4

Median fill in the blank 5

Standard Deviation fill in the blank 6

Which statistic was least changed by the outlier of 800?
_________

PreviousNext

Answers

Mean is 5.2, median is 5 and S.D is 2.135

Given data 2, 4, 5, 7, 8

We need to find mean, Median and standard deviation

What is mean and Median?

Mean = Sum of Observations/ Number of observations

Median=Middle most Number when arranged in a sequence

Mean = (2+4+5+7+8)/5=26/5=5.2

Median= 5

Standard deviation:

S.D=∑(x- bar)^2/N

To find sD

Subtract mean from each value

2-5.2=-3.2

4-5.2=-1.2

5-5.2=-0.2

7-5.2=1.8

8-5.2=2.8

Square each of those differences

-1.2*-1.2=1.44

-3.2*-3.2=10.24

-0.2*-0.2=0.04

1.8*1.8=3.24

2.8*2.8=7.84

Determine the average of those squared numbers to get the variance.

1.44 + 10.24 + 0.04 + 3.24 + 7.84 = 22.8

Average = 22.8/5=4.56

To find the standard deviation make square root of variance

2.135

Therefore Mean is 5.2, median is 5 and S.D is 2.135

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A rectangular prism has a base with a length of 25, a width of 9, and a height of 12. A second prism has a square base with a side of 15. If the volumes of the two prisms are equal, what is the height of the second prism?

picture is here

A rectangular prism has a base with a length of 25, a width of 9, and a height of 12. A second prism

Answers

Answer:

Step-by-step explanation:

the volume of a rectangle is length x width x height, so the volume of the first rectangle is 2700.

the square has a length and width of 15 with a missing height. because they have the same volume, you can plug in the length and width of the square with the volume of the prism to find the height

v = length x width x height

2700 = (15)(15)h

2700/225 = h

the height is 12

25 POINTS Which table of values represents a quadratic function?

25 POINTS Which table of values represents a quadratic function?

Answers

I’m pretty sure it’s b or c I’m kinda too but I second guess my self to much

Consider the same firm with production function: q=f(L,K) = 20L +25K+5KL-0.03L² -0.02K² Make a diagram of the total product of labour, average product of labour, and marginal product of labour in the short run when K = 5. (It is ok if this diagram is not to scale.) Does this production function demonstrate increasing marginal returns due to specialization when L is low enough? How do you know?

Answers

The MP curve initially rises to its maximum value because of the specialized nature of the fixed capital, where each additional worker's productivity rises due to the marginal product of the fixed capital.

Production Function: q = f(L,K) = 20L + 25K + 5KL - 0.03L² - 0.02K²

Given, K = 5, i.e., capital is fixed. Therefore, the total product of labor, average product of labor, and marginal product of labor are:

TPL = f(L, K = 5) = 20L + 25 × 5 + 5L × 5 - 0.03L² - 0.02(5)²

= 20L + 125 + 25L - 0.03L² - 5

= -0.03L² + 45L + 120

APL = TPL / L, or APL = 20 + 125/L + 5K - 0.03L - 0.02K² / L

= 20 + 25 + 5 × 5 - 0.03L - 0.02(5)² / L

= 50 - 0.03L - 0.5 / L

= 49.5 - 0.03L / L

MP = ∂TPL / ∂L

= 20 + 25 - 0.06L - 0.02K²

= 45 - 0.06L

The following diagram illustrates the TP, MP, and AP curves:

Figure: Total Product (TP), Marginal Product (MP), and Average Product (AP) curves

The production function demonstrates increasing marginal returns due to specialization when L is low enough, i.e., when L ≤ 750. The marginal product curve initially increases and reaches a maximum value of 45 units of output when L = 416.67 units. When L > 416.67, MP decreases, and when L = 750 units, MP becomes zero.

The MP curve's initial increase demonstrates that the production function displays increasing marginal returns due to specialization when L is low enough. This is because when the capital is fixed, an additional unit of labor will benefit from the fixed capital and will increase production more than the previous one.

In other words, Because of the specialised nature of the fixed capital, the MP curve first climbs to its maximum value, where each additional worker's productivity rises due to the marginal product of the fixed capital.

The APL curve initially rises due to the MP curve's increase and then decreases when MP falls because of the diminishing marginal returns.

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Is this relation a function
y=2x - 5

Answers

Answer-

yes

Step-by-step explanation:

yes, because no matter what value you plug in for x, you'll always get the same y.

For instance, if you plug in 3 as the value for x, y will always be 1.  This is true for every x, so this is a function.

The original balance in Aisha’s account was $760. Last week, she wrote five checks to her employees, each for $100. what is Aisha’s net balance?​

Answers

The answer would be $260

Aisha's net balance after writing the check of $100 to five employees will be $260 .

Given, Aisha’s account balance $760.

Now, to get the net balance of account after deductions .

Remaining amount = Original Balance - Payment amount.

Substitute the values,

Remaining amount = $760 - 5 × $100

Remaining amount = $760 - $500

Remaining amount = $260

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