the length of a rectangle is 4 meters less than twice its width. The area of the rectangle is 70. Find the dimensions of the rectangle

Answers

Answer 1

Answer:  The width is 7 meters. The length is 10 meters.

Step-by-step explanation:   Area = Length × width

Length is 2w - 4  

Substitute that value for length, then solve for w.

70 = w(2w - 4)

70 = 2w² - 4w  reorganize to quadratic equation form

2w² - 4w -70 = 0   These are All even numbers; factor out 2 (divide all by 2)

w² - 2w - 35 = 0  factor this

(w - 7)(w + 5)    set each factor = 0 and calculate the value of w.

w+5=0  w= -5  (disregard this one because dimensions of real rectangles can't be negative)

w - 7 = 0  w = 7   The width is 7

Substitute into the original expressions to get the value of Length.

2(7) -4 = L    14 - 4 = L  The Length is 10.

Check by substituting into the original equation:

w × 2w -4 = 70

7 × 2(7) -4 = 70

7 × 10 = 70    TRUE!

w

Answer 2

Dimensions of the rectangle are length=10 meter and width= 7 meter

What is Rectangle?

A rectangle is a quadrilateral with four right angles.

Given,

The length of a rectangle is 4 meter less than twice its width

Consider,

l is the length of the rectangle

w is the width of the rectangle

l=2w-4

Area of the rectangle = Length × Width

70=l × w

Substitute the value of l is the second equation

70=(2w-4)×w

[tex]2w^{2} -4w=70\\2w^{2} -4w-70=0[/tex]

Take 2 outside

[tex]2(w^{2}-2w-35)=0\\ w^{2} -2w-35=0\\(w+5)(w-7)=0[/tex]

w=7,-5

Hence w wont be negative value

Therefore w=7 meter

Then,

l×w=70

[tex]l=\frac{70}{7}\\[/tex]

l=10 meter

Hence, the dimensions of the rectangle are length=10 meter and width= 7 meter

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Related Questions

charles charges $4 an hour to baby-sit. He also adds an extra $10 onto the total for families with more than three children. Write an equation for what Charles charges to baby-sit a family of 4 children.

y = 4x - 10

y = 4x + 10

y = 40x

y = 4x + 10x

Answers

Answer:

b

Step-by-step explanation:

The required expression for Charles is y = 4x + 10. Option b is correct.

An expression to be determine that explain charles charge for the families have more than 3 children.

What are equations?

Equation are the coded expression that describes the mathematical familiarities of the word statement.

Here, Charles charge $10 more beside of $4 an hour to baby sit for the families having more than 3 children.
⇒ let  'y' is the total charge applied and 'x' is hours of baby sit.
y = 4x + 10

Thus, the required expression for Charles is y = 4x + 10.

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joe deposits $1500 in an account that pays 3% annual interest compounded conitiniously how much will joe have in his account after 5 years

Answers

Answer:A = 1500e^(0.03 * 5) = 1500e^(0.15)

use definition of logarithm

0.15 = ln(A / 1500)

0.15 = ln(A) - ln(1500)

ln(A) = 0.15 + ln(1500) = 0.15 + 7.313220387 = 7.463220387

Step-by-step explanation:

The amount of money Joe would have in his account after 5 years is $1742.75.

Given the following data:

Principal, P = $1500Interest rate, R = 3%Time, T = 5 years

To determine the amount of money Joe would have in his account after 5 years.

Mathematically, an interest that is compounded continuously given by the formula:

[tex]A = Pe^{rt}[/tex]

Where:

A is the future valueP is the principal.r is the interest rate.t is the time in years.

Substituting the given parameters into the formula, we have;

[tex]A = 1500 \times e^{0.03 \times 5}\\\\A = 8000 \times e^{0.15}\\\\A = 1500 \times 1.1618[/tex]

A = $1742.75

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PLEASE HELP!! ASAP!!
Answer the following question

1. Bejar is now known as the city of San Antonio. The author says, “ As one covers the distance from Béjar to this town, he will note that Mexican influence is proportionately
diminished “What cardinal direction can you assume he has traveled from Bejar to reach “This Town"?

2. why might the influence of the Mexican government and culture diminish the further away one travels from Bejar?

3. Terran discovered that the foreigners outnumber the Mexican by what ratio?

4. Who are the “foreigners” that Teran repeatedly refers to?

5. What does Teran predict could happen in Texas if the Mexican government does not strengthen its control over Texas?

Answers

Answer: 1.Twelve months have now elapsed since the first half volume of this work was offered to the public. The favourable reception it has experienced gives the Editor reason to hope that he has fulfilled the engagements which he came under at its first appearance, and is a powerful inducement to continue his utmost exertions to preserve and improve the character of the work. In the four volumes which are now published, several extensive and important original articles are introduced, which have not hitherto appeared in any similar collection, and had not even been previously translated into English. These materially contribute towards the ample information which was formerly announced, in the Preface to the first Volume, as a leading object in this Collection. In the subsequent parts of the work, every effort shall be made to fill up its several divisions with original articles of similar interest and equal importance.

Encouraged by a satisfactory and increasing sale, the progress of publication has been somewhat hastened, beyond what was originally promised in the Prospectus and Conditions; as the whole of the fourth Volume is now published, at the period when only its first half was to have appeared. It is intended to repeat this anticipation occasionally, by the publication of two numbers or half-volumes at once, when opportunity offers. While this may gratify one portion of our readers, it is not meant to preclude others from continuing to be supplied, as before, with the numbers or half volumes at regular intervals, in their own option.

2.As the population in Texas from the United States swelled, Mexican authorities grew increasing nervous. In 1827, the Mexican government sent General Manuel de Mier y Terán to investigate the situation. He warned that unless the Mexican government took timely measures, settlers were certain to rebel. Differences in language and culture, Terán believed, had produced bitter enmity between the colonists and native Mexicans. The colonists refused to learn the Spanish language, maintained their own separate schools, and conducted most of their trade with the United States.

3.While holding out the possibility of compromise, the Texans prepared for war. The provisional government elected Sam Houston, a former Tennessee governor, to lead whatever forces he could muster. Then in early 1836, a band of three hundred to five hundred Texans captured Mexico's military headquarters in San Antonio. The Texas revolution was under way.

4.Don Manuel de Mier y Terán: As It Affected Texas-Mexican Relations (Continued)

5. THEY MARCHED AN ARMY INTO TX TO STOP THE REBELLION. THE MEXICAN GOVERNMENT “DISOWNED” SANTA ANNA AND THE TREATY; IT DID NOT RECOGNIZE TX INDEPENDENCE FORMALLY UNTIL THE END OF THE MEXICAN AMERICAN WAR.

Step-by-step explanation:

1. What is the measure of angle 4?
2. What is the measure of angle 1?
3. What the measure of angle 3?
4. What is the measure of angle 6?
5. What is the relationship between angles 4 and 5?

Answers

Answer:

d

Step-by-step explanation:

is answer sd

1. Write a story about Sylvia's bike ride home. Include as many details as you
can about distance, time, and speed. (You can refer to the segment #'s in
your story if you find it helpful)

Answers

Answer:

sylvia is biking home (segment 1) she is traveling at a constant rate of a mile every 15 minutes, she then takes a 20 minute break relizing she dropped something, she goes back and finds it ten minutes later (3) then she bikes home at a rate of 7 miles per 30 minutes.

Step-by-step explanation:

what is 2 + (-7/20)? I've been trying to figure it out for a while but i cant seem to get the right answer.

Answers

The answer you should get is 33/20 or 1.65. How you get this answer is you start by removing the parentheses, then calculate the difference.

2 + (-7/20)

2 - 7/20

20 times 2 equals 40

Subtract 7 from 40

Keep your denominator the same and change your numerator to 33.

What is the value of 3/8 x - 4.5 when x =0.4

Answers

-3.5625 is you use pemdas

can someone find loverboy444? thank you! who ever finds him will get a request!​

Answers

Answer:

I can try

Step-by-step explanation:


HELP ASAP GIVING BRAINLIEST

Solve for x if the angles are adjacent supplementary angles. Use pencil and paper. Show how to check that your value of x is correct

Answers

Answer:

x=15

Step-by-step explanation:

srry if I'm wrong =(

Given the point A(3,4) find the coordinates of three other point to create a parallelogram ABCD that isnt a rectangle or square

Answers

Answer:

Iloveyou ayeeeeeeeeei

❤️❤️❤️

A (3,4)
B (7,4)
C (2,1)
D (6,1)

Emily's car broke down the weekend before she started a new job. She borrowed $880 from her parents, at an annual interest rate of 3%, to quickly pay for the car repairs. If Emily paid her parents a total of $893.20 in six months, how much simple interest did she pay?

Answers

Answer:

$13.2

Step-by-step explanation:

Step one:

given data

principal=$880

rate= 3%

final amount = $893.2

time t= 6 months =0.5 years

Step two:

Required

Simple interest

SI=PRT/100

SI=880*3*0.5/100

SI=1320/100

SI=13.2

She paid Simple interest of $13.2

Which equation is modeled below?
-x+ 1 = 2x+ 3
X+(-1) = 2x+3
X+(-1) = 3x+2
-2x = 2x+3

Answers

Answer:

Step-by-step explanation:

First one

Answer:

A

Step-by-step explanation:

Use the given information to solve for x.

x+3
2x-9
What is x?

Answers

Answer:9

Step-by-step explanation:


Find the square root of -36.
A-6
B 6
C Cannot be done

Answers

Answer: C) Cannot be done

Taking the square root of a negative number is not possible unless you involve complex numbers. If your teacher has not introduced that topic yet, then you just simply say "cannot be done" or something along those lines.

all of the following represents the same expression except ___.

a. -8ab
b. -8(a)(b)
c. 8 - ab
d. -8 • a • b​

Answers

Answer:

What is the following expresion?

Step-by-step explanation:

Answer:

C. 8 - ab

Step-by-step explanation:

all the other represents -8 multiply by a by b.

Solve the inequality 7x - 11 < 9x + 22.

Answers

Answer:

x>-33/2

Step-by-step explanation:

this is because you must solve the equation. when you divide by a negative number in order to get the x alone the sign of the inequality flips.

Answer:

[tex]x > \frac{ - 11 - 22}{2} [/tex]

Step-by-step explanation:

Step 1: Subtract 7x7x from both sides.

−11<9x+22.−7x

Step 2:Simplify 9x+22.-7x9x+22.−7x to 2x+22.2x+22.

−11<2x+22.

Step 3:Subtract 22.22. from both sides.

−11−22.<2x

Step 4:Divide both sides by 22.

[tex] \frac{ - 11 - 22}{2} < x[/tex]

Step 5, Switch sides.

[tex] x > \frac{ - 11 - 22}{2} [/tex]

I hope it helps you.

it took Corinne 3 hours to do 12 pages of homework.How many pages of homework did she do per hour?

Answers

Answer:

4 ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ

Step-by-step explanation:

12÷3=4

What is the slope of the line 4x – 2y = 10? Explain your process (show your steps) for determining the slope.​

Answers

solve for y.
subtract 4x from both sides
-2y = -4x + 10
divide everything by -2
y = 2x - 5
slope intercept form is y = mx + b, with m being the slope, so 2 is your slope

Which of the following is not a function?
3-1
3-2
3-7
7-1
7-2
7-7

Answers

Answer:

They are all not a function

Step-by-step explanation:

a function can only have one output.

3 in this set has 3 outputs and 7 in this set has 3 outputs aswell

URGENT!!!! HELP PLEASE!!!

Answers

Answer:A. 60Hope this helps!!

A, skdigjnaaojbdjaoxjbeoahxf

Help plzzzzzzzzzzzzzz ​

Answers

Answer:

∠P

Step-by-step explanation:

∠P is between NP and PE

LLEASE HLEP HELP PLEASE HELP

Answers

Answer:

V= 301.44

Step-by-step explanation:

the formula for a cone is 1/3 Bxh

B= area of base

h= height

Five out of eight birds that visited the feeder ate the birdseed. If 60 birds ate the birdseed today, how many birds visited the feeder?

Answers

Answer:

Therefore, the birds visited the feeder = 96

Step-by-step explanation:

Five out of eight birds that visited the feeder ate the birdseed.

i.e. the ration is: 5/8

Given that 60 birds ate the birdseed today.

Note that if we multiply '5' by '12', we get the number 60.

Now, all we need to is to also multiply '8' by '12' to maintain the initial ratio which is 5/8.

i.e. (5×12) / (8×12) = 60/96

Therefore, the birds visited the feeder = 96

PLEASE HELP. SOON. I really need help i’m struggling a lot lol

Answers

Answer: A

Step-by-step explanation: trust me bro

If 3 pens cost $2, then how many can can you buy with $20

Answers

Answer:

30

Step-by-step explanation:

A town’s population is 60,375. An average of 125 people move into the town each month. Write an equitation to find m, how many months will population of the town be equal to 64,875?

A. 125m+ 60,375=64,875

B. 64,875m+ 125 =60,375

C. 60,375m+ 125 =64,875

D. 125m+ 65,875 = 60,375

Answers

I think the answer is A

solve for c: c-7 ≥ -3

Answers

c> or =-3+7
c> or =4

What is the slope of the line?
pls help I need the answer

Answers

Answer:

the slope of a horizontal line is 0

dudee plz help will be given the brainlist if answered correctly

Answers

Answer:

hey im not actually here to help you, i just need points. thanks for the points

Step-by-step explanation:

ANSWER WHAT YOU CAN NEED THEM ASAP PLZ

Answers

Answer:

5. 23

6. 26

7. 20

8. 45

9. 15

10. 120

11. 60 full triangle is 180 and since it is equilateral you divide it by 3 you get 60

12. It is not possible. if you use the pyagorean theorem (not sure on spelling of that?) you get 16 so its not possible for it to be 12.

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