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
Dmitriy789 [7]
3 years ago
9

A rectangle has twice the area of a square. the rectangle is 18 inch by 4 inch . what is the perimeter of the square

Mathematics
2 answers:
Westkost [7]3 years ago
8 0
Rectangle:

A = BH
   = (18)(4)
   = 72

Finding area of square:

72 = 2x
/2     /2
36 = x

Finding perimeter of square using area:

P = √a * 4
   = √36 * 4
   = 6 * 4
   = 24

Therefore the perimeter of the square is 24 inches. I am not sure so sorry for any mistakes.
OverLord2011 [107]3 years ago
4 0
\bf 
\textit{area of a rectangle}\\\\
A_r=lw\quad 
\begin{cases}
l=length\\
w=width\\
-----\\
l=18\\
w=4
\end{cases}\implies A_r=18\cdot 4\implies A_r=72\\\\
-------------------------------\\\\

\bf \textit{area of a square}\\\\
A_s=lw\quad 
\textit{area of a rectangle}\\\\
A_r=lw\quad 
\begin{cases}
l=length\\
w=width\\
l=w=x
\end{cases}\implies A_s=x\cdot x\implies A_s=x^2\\\\
-------------------------------\\\\
A_r=2\cdot  A_s\implies  72=2x^2\implies\cfrac{72}{2}=x^2\implies 36=x^2
\\\\\\
\sqrt{36}=x\implies \boxed{6=x}

the square has 4 sides, thus its perimeter is 6+6+6+6.
You might be interested in
What are the coordinates for this point? <br><br><br> Point D
TEA [102]
(0,-4) is the coordinate for point D
4 0
3 years ago
Read 2 more answers
If you were to solve the system using the addition method, what would you multiply the first equation by in order to make the x'
Inessa05 [86]
2 times 2=4
multiply first equation by 2 to get
-4x+6y=12
then add to get

-4x+6y=12
<u>4x-2y=8 +</u>
0x+4y=20

4y=20
y=5

sub back
-2x+3y=6
-2x+3(5)=6
-2x+15=6
-2x=-9
x=9/2=4.5


the number to multiply by is 2
7 0
3 years ago
Please help me !!!!!!!!
Neko [114]
Hi :)
the correct answer is J
hope this helps!
6 0
2 years ago
Write an algebraic expression for the phrase. The quotient of 5 and the sum of 12 and a number x
anzhelika [568]

Answer:

the answer is (12 +x)/5 please mark brainliest

3 0
2 years ago
What is cos P?<br><br> A. 5/13<br><br> B. 12/5<br><br> C. 5/12<br><br> D. 12/13
guajiro [1.7K]
The answer is A. 5/13
4 0
3 years ago
Read 2 more answers
Other questions:
  • Solve 8w – 3r = 45 for r
    9·1 answer
  • A drawer is filled with 7 black shirts,5 white shirts,10 gray shirts. one shirt is chosen at random from the drawer. find the pr
    8·1 answer
  • Find the volume of the cone. Round your answer to the nearest tenth
    8·1 answer
  • Find the value of c that makes t^2– 22t+ c a perfect square trinomial.
    6·1 answer
  • The measure of EC bisects
    7·1 answer
  • What is the measure of PRQ
    6·1 answer
  • What is the formula for the volume of a cone? (Use the word Pi instead of the symbol)
    15·1 answer
  • Fish are sold at 10 for $8.64. What will be the cost of 16 fish
    10·1 answer
  • #1 A buoy, bobbing up and down in the water as waves pass it, moves from its highest point to its lowest point and back to its h
    7·1 answer
  • What us 8171.28 in 1 d.p​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!