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
Anna11 [10]
3 years ago
15

Work out the area of a rectangle with base, b = 20mm and perimeter, P = 42mm.

Mathematics
2 answers:
polet [3.4K]3 years ago
6 0

Answer:

Let the length of the rectangle be 'l'

We have,

Perimeter of rectangle, P = 42mm.

or, 2(l+b) = 42\\or, l +b = \frac{42}{2} = 21\\or, l + 20 = 21\\or, l = 1mm\\

Area of rectangle = lb = 1(20) = 20mm^{2}

Zarrin [17]3 years ago
3 0

Answer:

20mm

Step-by-step explanation:

base=20mm

base x 2 because there are two long lines

20 x 2 = 40

42-40=2

amount needed on either side to balance

height=1mm

20 x 1 = 20mm

area = 20mm

You might be interested in
The difference of two numbers is 0.77. If the larger number is increased 5 times, then the difference becomes 77. Find the numbe
Lelu [443]

Let the two numbers are x and y

Let larger number = x

and smaller number = y

it means

x-y = 0.77

Now it says larger number is increased 5 times

So it now becomes 5x

So second equation becomes

5x -y =77

Now we have to solve these two equations

x-y = 0.77 and 5x-y = 77

multiply first equation by -1 and then add both equations

-x+y = -0.77

Now on adding we get

-x+5x +y -y = 77-0.77

4x = 76.23

Divide both sides by 4

x=19.0575

We get the larger number , now subtract 0.77 from this , we will get the smaller number

y=19.0575-0.77=18.2875

y=18.2875


Hence the larger number = 19.0575

Smaller number = 18.2875

8 0
2 years ago
Read 2 more answers
I need help with this ASAP I will mark brainlest. The question is in the picture below
Vilka [71]

Answer:

8

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Help me plz really need to get this done
Montano1993 [528]
3.3 
6 \frac{7}{8} = \frac{55}{8}

-1/8 - 55/8 = -56/8 = -7 

3.4 
(-4x7)/10 = -28/10  = -14/5

3.5
-19/2 ÷ 38/7  <=> -19/2 x 7/38 and simplify = -7/4

3 0
3 years ago
Read 2 more answers
When driving the peregrine falcon can reach speed of up to 175 miles per hour
zepelin [54]
thank you for the information
but where is the question??????
3 0
3 years ago
Alyssa took a math test for 20 questions and she answered 16 questions correctly in order to get an a she needs to answer at lea
Elenna [48]

Answer:

She did not qualify the exam.

Step-by-step explanation:

Given data

Total no of question in a test = 20

No. of question answered correctly = 16

Percentage of question answered correctly

(\frac{16}{20}) 100 = 80

But in order to get in the exam the student must have to score at least 90 %. But she got only 80 % so she did not qualify the exam.

6 0
3 years ago
Other questions:
  • Please help me I have been stuck for 30 minutes.
    8·1 answer
  • Write the expression as an exponent: 0.4^5·0.16
    7·1 answer
  • 8.
    7·1 answer
  • Help I have no clue how to do this
    14·1 answer
  • Round 0.1347 to the nearest tenth. Do not write extra zeros.
    15·2 answers
  • What is 2 1/4 as an improper fraction​
    10·2 answers
  • Solve for x. thank you
    7·1 answer
  • PLZ HELP ME!!!!!! Help Is Urgent!!!!!!!!!
    5·1 answer
  • An=128 •(1/2)^n-1 <br> a5=?<br> ^fifth term
    15·1 answer
  • the altitude is drawn from the vertex angle of an isosceles triangle and is 15 cm long, if the base of the triangle is 16 cm lon
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!