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
Eddi Din [679]
3 years ago
13

What is the maximum area for a rectangle whose perimeter is 48 meters?

Mathematics
1 answer:
MakcuM [25]3 years ago
5 0

Answer:

12m²

Step-by-step explanation:

For a rectangle, with length L and width W,

the perimeter is given as

Perimeter,

P = (2 x Length)  + (2 x Width)

P = 2L + 2W

It is given that the perimeter is 48, hence

48 = 2L + 2W   (divide both sides by 2)

24 = L + W

or

L = 24 - W -----> eq 1

Also realize that the Area of a Rectangle is given by

A = L x W  -----> eq 2

Substituting eq 1 into eq 2,

A = (24 - W) x W

A = -W² + 24W

Recall that for a quadratic equation y = ax² + bx + c, the maxima or minima is given by y(max) =  -b/2a

In this case, b = 24 and a = -1

-b/2a = -24/[ 2(-1) ] = 12

Hence for A to be maximum A(max) = 12m² (Answer)

You might be interested in
3 / m + 4 - 4 / m = 6 (i) Show that this equation can be written as 6m^2 + 25m+16= 0
Evgen [1.6K]

Answer:

Proved Below

Step-by-step explanation:

\sf \frac{3}{m+4} - \frac{4}{m} = 6\\LCM = m(m+4)\\Multiplying \ both \ sides \ by\ m(m+4)\\3m - 4(m+4) = 6m(m+4)\\3m-4m-16 = 6m^2+24m\\-m-16 = 6m^2+24m\\Adding\ m\ to\ both\ sides\\-16 = 6m^2+24m+m\\-16 = 6m^2+25m\\Adding \ 16 \ to \ both \ sides\\0 = 6m^2+25m+16\\OR\\6m^2+25m+16 = 0

Hence, Proved that \sf \frac{3}{m+4} - \frac{4}{m} = 6 is equivalent to \sf 6m^2+25m+16 = 0.

6 0
3 years ago
Read 2 more answers
PLZ HELP I WILL GIVE BRAINLIEST...
Delicious77 [7]

Answer:

a. 6

b. 7

c. (b) Kira's

why? b. it has the large sample size

Step-by-step explanation:

7 0
3 years ago
Aline crosses the coordinates (-4,-5) and (2, 4). What is the slope of the line?
djyliett [7]

Answer: use the website desmos and plug in the cordinate it gives u the line automaticaly.

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Kara was baking a cake. The recipe called for 8.5 cups of flour and she put in 3.2 cups so far. How many more cups of flour does
alina1380 [7]

Answer:

5.3 cups of flour

Step-by-step explanation:

8.5 - 3.2 = 5.3 cups of flour

5 0
3 years ago
What triangle has sides 23mm,20mm,13mm..angles 62°,72°,46°
liberstina [14]
This kind of triangle is acute triangle because on the given three angles, none of them does not exceed more than 90°.
3 0
2 years ago
Read 2 more answers
Other questions:
  • Transformation of Functions: Need help with problem.
    5·1 answer
  • A piece of pipe is 303/4 inches long. If five pieces, each 41/3 inches long, are cut from the pipe, how many inches of pipe rema
    11·1 answer
  • 76 fl oz = c<br> A 608<br> B.9 1/2<br> C.19 <br> D.9
    9·1 answer
  • Dennis grilled 10 burgers and 25 hot dogs for
    10·2 answers
  • 6,384 meters in millimeters
    5·2 answers
  • Does anyone know this?
    11·1 answer
  • Peter compra 8 limones por $6. Cada limón tiene el mismo precio.<br> ¿Cuál es el costo de 1 limón?
    11·1 answer
  • Express
    11·1 answer
  • Plz help to find a <br>u will get 20 points ​
    13·1 answer
  • What is the length of A'B'?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!