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
Ivahew [28]
3 years ago
14

The 3 by 3 grid below shows nine 1 cm × 1 cm squares and uses 24 cm of wire. What length of wire is required for a similar 20 by

20 grid?

Mathematics
1 answer:
Nady [450]3 years ago
5 0

Answer:

840

Step-by-step explanation:

Hi there!

Usually, this kind of problem asks us the perimeter rather than the area. But when talking on this grid on how many cms are necessary to construct one made up of 9 squares 1cm x1 cm. We need to check one thing: Some line segments will be used twice. So this is not a classical perimeter question.

1) So we either manually and carefully count it avoiding not doing it twice the same common line segments.

Or.

2) By just applying an algorithm, Where n is the <em>nxn</em> grid

n(n+1)+n(n+1)=Length \:of \:the \:wire

So, for the 20x20 grid

20(20+1)+20(20+1)=length\\\\20(21)+20(21)=length\\length=840 cm

You might be interested in
I need help plz anyone I don't understand this at all.
nasty-shy [4]

Answer:

jejejjejejr

Step-by-step explanation:

uejejjejejjsjs

5 0
2 years ago
Read 2 more answers
Adam is rewriting the expression
Lostsunrise [7]

Answer:

Adam is typing...

Step-by-step explanation:

7 0
3 years ago
PLESASE HELP asap !!!!!!! a line passes through the point (2,6) and has a slope of -9 write the equation of the line in point sl
posledela

Answer:

the equation is (9), 1,3

7 0
2 years ago
I need help it's really hard<br>Properties of exponents
Agata [3.3K]

\bf 12^x\times 12^4=12^8\implies \stackrel{\textit{if the base is the same, so are the exponents}}{12^{x+4}=12^8} \\\\\\ x+4=8\implies x=4

3 0
3 years ago
Cindy is making a 21.5 inch necklace. There are beads every 3.25 inches along the necklace from the beginning of the necklace. W
DochEvi [55]

21.5 divided by 3.25

equals 6.615

round up to 6.62

7 0
2 years ago
Other questions:
  • Two angles are supplementary if their sum is 180 degrees. One angle measures three times the measure of a smaller angle. If X re
    7·1 answer
  • Evaluate the expressionvwhen c= -7 and x = 7. c-8x
    11·1 answer
  • GUYS PLZ HELP ME!!!!!!
    15·1 answer
  • Which represents the solution set of 5(x+5)&lt;85
    6·2 answers
  • HELP ME QUICKLY PLEASE
    14·1 answer
  • Boris currently has a savings account. He saves $25 per month.
    8·1 answer
  • What is -3/5 as a decimal​
    9·2 answers
  • Simplify the expression to a form in which 2 is raised to a single integer power. fraction numerator open parentheses 2 to the p
    11·1 answer
  • Monica invierte $500 en un banco que paga un 15% interés simple
    11·1 answer
  • Plz help ASAP!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!