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
Lostsunrise [7]
3 years ago
12

Help me do this question i need help

Mathematics
1 answer:
poizon [28]3 years ago
6 0

Answer:

<em>P = 35 cm</em>

Step-by-step explanation:

<u>Rectangles</u>

Being x and y the dimensions of a rectangle, the perimeter can be calculated as:

P = 2x + 2y

The smaller rectangles of the figure have a width of x cm. We don't know the value of the length, but we can see how the two smaller horizontal rectangles' widths complete the height of the vertical rectangle. Since all the rectangles are identical, then the height of each rectangle is

y = 2x

Substituting in the formula and knowing the perimeter is 21:

2x + 2(2x) = 21

6x = 21

x = 21/6 = 7/2 = 3.5

The large rectangle has a width of 2x and a length of y+x = 3x, thus the perimeter is:

P = 2(2x) + 2(3x) = 4x + 6x = 10x

Since x=3.5 cm:

P = 35 cm

You might be interested in
Write the equation of the linear relationship with a slope of -1/2 that goes though the point (-2,1).
finlep [7]
Y=mx+b
Find the y-intercept (-2,1)
1=-1\2(-2)+b
1=2\2+b
1=1+b
-1+1=b
0=b
Y=-1\2x this the answer ,the slope is zero you don't need to write it!
3 0
3 years ago
Mrs.suarez cut a pizza into 8 equal slices.each person in her family ate 2 slices .if there are 3 people in her family,what frac
sesenic [268]
If there are 3 people in the family and each ate 2 slices. 6 slices were eaten in total.

To find the ammount of pizza eaten, divide the total slices eaten (6) over the original ammount of slices (8)

Eaten ammount = 6/8 = 3/4
3 0
3 years ago
Read 2 more answers
Shalane owns a flower nursery in a small town. She took an inventory of the number and types of flowers she sold this month.
Mrac [35]
So since 60+43+24+14+18+35+6= 200 and she sold 14 hyacinths out of those 200 flowers, you are trying to find how many flowers she should anticipate selling out of 2,000. The equation looks like this:
14/200 = ?/2,000
To find out what the value of ? is, find out how the denominators are related. To do this, do 2,000 divided by 200 which equals 10. To keep the fractions equivalent, what you do to the top, you must do to the bottom. So if 200 x 10= 2,000   14 x 10 will be your answer. 14 x 10= 140
14/200 = 140/2000

So, out of 2,000 flowers Shalane should anticipate selling 140 hycinths.

I hope this helps:)
6 0
3 years ago
deb is searching online for tickets two weeks ago the cost wass 200 now the cost is 280 what is the percent increase wha would i
Tasya [4]

Answer:

Step-by-step explanation:

200 = 100%

80  = x%

200x = 8000

x = 40% (percentage increase)

400 = 200%

100 = 50%

500 = 200% + 50%

500 = 250% (the other percentage increase)

6 0
3 years ago
Write the expression of seven less than n
kow [346]
7 < n, what you do is take the number figure out whether or not its bigger or smaller, add in the sign, and put your n or variable (:
3 0
4 years ago
Read 2 more answers
Other questions:
  • What is the solution of |x|=1/2
    10·1 answer
  • What is the mean of the set of data?
    15·1 answer
  • A sled is being pulled with a force of 120 N at an angle of 35o with the horizontal. How far is the sled pulled if 1100 J of wor
    14·1 answer
  • How to find surface area​
    11·2 answers
  • Ricky looked at his checking account balance regularly. The inequality statement compares the magnitude of his two lowest balanc
    12·1 answer
  • Which expression uses the commutative property of addition and the associative property of multiplication to rewrite the express
    15·1 answer
  • Which phrase best completes the diagram?
    13·2 answers
  • CAn someone help hhahaahah
    14·2 answers
  • Find the missing angle measure.
    10·2 answers
  • 1. A car engine is 25% efficient. How much input energy produces 100 J of useful energy?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!