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
Feliz [49]
2 years ago
12

Una persona asegura que su casa tiene forma rectangular y que el perímetro de la misma es de 18 m y que además, su área es de 21

m^2. Demuestra que la persona estaba mintiendo.
Mathematics
1 answer:
leva [86]2 years ago
4 0

Considerando las fórmulas para el perímetro y el área de un rectángulo, hay que se chega en una <u>eccuación cuadrática sin solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

<h3>¿Cuál es la fórmula para el perímetro y el área de un rectángulo?</h3>

Considerando que las dimensiones son l y w, hay que:

  • El perímetro es: P = 2(l + w).
  • El área es: A = lw.

El <u>perímetro es de 18 m</u>, o sea:

2(l + w) = 18

l + w = 9

l = 9- w.

El <u>área es de 21 m²</u>, o sea:

lw = 21

(9- w)w = 21

-w² + 9 - 21 = 0

w² - 9w + 21 = 0

El discriminante es dado por:

D = 9² - 4 x 1 x 21 = -3.

El discriminante negativo implica que la <u>eccuación cuadrática no tiene solución</u>, o sea, las medidas no son posibles y la persona estaba mintiendo.

Puede-se aprender más a cerca de el perímetro y el área de un rectángulo en brainly.com/question/26475963

#SPJ1

You might be interested in
5/4 ÷ 10 = ? <br> (hhhhhh... ignore this part, reaching the minimum amount of characters)
MrRa [10]
The Correct answer is 1/8
8 0
3 years ago
Read 2 more answers
Help me with B please
salantis [7]
Area of each piece of paper is 8\frac{1}{2}\times11=\frac{17}{2}\times11=\frac{187}{2}

Greatest number of possible piece of paper is [1000\div\frac{187}{2}]=[1000\times\frac{2}{187}]=[\frac{2000}{187}]=10
4 0
3 years ago
A red bus leaves a theme park every 24 minutes and a blue bus leaves the park every 20 minutes. they both leave the park at noon
earnstyle [38]

Answer:

2:00 PM

Step-by-step explanation:

20 = 2² × 5

4 0
3 years ago
george wanted to measure the angle of a waterslide at the lake .he used a sheet of folded paper that formed 20 degree angle. he
evablogger [386]

Answer:

It's not clear on what it means but the information given it would just be 20*3=60

Step-by-step explanation:

4 0
3 years ago
Given that y l b and z l b what conclusion can be made
Helen [10]

Answer:

y I z

Step-by-step explanation:

We can see that y I b  and z I b we can conclude also that

y I z.

3 0
3 years ago
Other questions:
  • Which expression is equivalent to 1/2 (2n+6)?​
    12·2 answers
  • The 1992 world speed record for a bicycle (human-powered vehicle) was set by Chris Huber. His time through the measured 200 m st
    14·1 answer
  • Find the slope of the line containing the pair points (9,5) (6,4)
    10·1 answer
  • *LAST QUESTION, HURRY AND PLEASE ANSWER, WILL CHOOSE BRAINLIEST FOR DETAILS AND ANSWER* How many times larger is the rectangular
    15·1 answer
  • Write a function rule that represents D less than five is P
    5·1 answer
  • ((I will give brainy and 20 points to the first person who answers correctly!))
    11·1 answer
  • Approximate the number 32 to the nearest hundreth
    7·1 answer
  • The total cost for four people to bowl one game is $21. Each person paid $1.50 to rent their shoes, in addition to the cost of t
    6·1 answer
  • Which of these is a correct identity?<br> x + 4x = 5x<br> 6x = 18<br> 2x + 1 = 7<br> 7x + 9 = x
    8·1 answer
  • What is the answer for 30/-31?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!