1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
matrenka [14]
2 years ago
7

The length of a rectangle is 3 inches more than the width. The area is 10 square inches. Find the dimensions

Mathematics
1 answer:
mr_godi [17]2 years ago
6 0

Answer:

Width = 2

Length = 5

Step-by-step explanation:

let A be the area of the rectangle

   L be the length of the rectangle

   w be the width of the rectangle

<u><em>Formula</em></u>: ‘<u><em>area of a rectangle</em></u>’

A = L × w

…………………………………………………

A = L × w

⇔ 10 = (w + 3) × w

⇔ 10 = w² + 3w

⇔ w² + 3w - 10 = 0  

<u><em>Solving the quadratic equation</em></u> w² + 3w - 10 =  0 :

Δ = 3² - 4(1)(-10) = 9 - (-40) = 9 + 40 = 49

then √Δ = 7

\Longrightarrow w=\frac{-b+\sqrt{\Delta } }{2a} =\frac{-3+7}{2} =2

  or\ w=\frac{-b-\sqrt{\Delta } }{2a} =\frac{-3-7}{2} =-5

-5 is not valid ,because w represents the width

which must be a positive number

Then  w = 2

<u><em>Conclusion</em></u>:

Width = 2

Length = 2 + 3 = 5

You might be interested in
What's 19/30 x 12/16?
mr Goodwill [35]
19/40 as a fraction and decimal it is 0.475
6 0
3 years ago
Read 2 more answers
Did Cherise use algebra tiles to correctly represent the product of (x – 2)(x – 3)?
Temka [501]
Which property of multiplication is shown ?
11 × 1
3 0
3 years ago
Read 2 more answers
The crew on a fishing boat caught 4 fish that weighed a total of 1,092 pound. The tarpon weighed twice as much as the amberjack
Savatey [412]

ddddd

Let T be the weight of Tarpon

Let A be the weight of amberjack

Let W be the weight of white marlin

Let TU be the weight of Tuna

The crew on a fishing boat caught 4 fish that weighed a total of 1,092 pound.

Total weight = 1092

T + A + W + TU = 1092

The tarpon weighed twice as much as the amberjack

T= 2 A

  the white marlin weighed twice as much as the tarpon.

W = 2 T

We know T is 2A  so W = 2(2A) = 4 A, W = 4A

The weight of the tuna was 5 times the weight of the Amber jack.

TU = 5A

T = 2A  , W = 4A , TU = 5A

Replace it in our equation

T + A + W + TU = 1092

2A + A + 4A + 5A = 1092

12A = 1092

Divide both sides by 12

A = 91

the weight of amberjack = 91 pounds

the weight of white marlin = 4A = 4(91) = 364 pounds

the weight of Tarpon = 2A = 2(91) = 182 pounds

the weight of Tuna= 5A = 5(91)=455 pounds

7 0
3 years ago
Daniel is organizing his rock collection of 18 rocks into equal groups.how many possible ways can Daniel line up his rock collec
Lunna [17]

Answer:

The possible ways Daniel line up his rock collection are {2, 3, 6 and 9}.

3 0
3 years ago
How do I convert 216 in percentage
AveGali [126]

Answer: 21600

216 as a percentage of certain number x can be calculated by dividing 216 by x, and multiplying the result by 100. For example, 216 as a percentage of 10 = (216 / 10) x 100% = 2160%.

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • explain how you can use multiplication to find the quotient 3/5 divided by 3/15. then evaluate the expression
    13·2 answers
  • The average of 3, 15, and my number is 40. What is my number?<br><br> I'll give 30 points!
    10·1 answer
  • 2x+4=3y can someone solve it?
    13·1 answer
  • Can someone help me with this question please?
    13·1 answer
  • Add my roblox: caadden
    8·2 answers
  • Barb, Shelley, and Darcy are college roommates. Barb goes to the library every 6 days, Shelley goes the library every 7 days, an
    11·1 answer
  • The ratio of dogs to cats is 2 to 3. There are 10 pets total. How many dogs are there? How many cats are there?
    5·1 answer
  • Please Help With Math Questions, I keep getting people with wrong answers answering. SO please oh please help me if you know the
    15·1 answer
  • Find the volume of the cone
    9·1 answer
  • When A is -3, is b or c greater
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!