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
jolli1 [7]
3 years ago
6

I need help with an area math question

Mathematics
1 answer:
Ede4ka [16]3 years ago
7 0

Answer:

Step-by-step explanation:

Area of outer triangle = \dfrac{4x*(4x+3)}{2}= 2x*(4x +3)

                                    = 2x*4x + 2x*3

                                   = 8x² + 6x

Area of inner triangle= \dfrac{2x*(2x+5)}{2}=x*(2x+5)=x*2x+x*5=2x^{2} + 5x

Area of aluminium = area of outer triangle - area of inner triangle

                        = 8x² + 6x + 2x² + 5x

                        = 10x² + 11x

Area of 20 aluminum borders = 20*(10x² + 11x)  = 200x² + 220x

b) x = 25 cm

Area of 20 aluminum borders = 200*25² + 220*25

                                                  = 200 * 625 + 220*25

                                                 = 125000  + 5500

                                                  = 130500 cm²

c) Area of inner triangle (Glass) = 5500 cm²

Cost of aluminium = 130500 * 0.06 = $ 7830

Cost of glass = 5500 * 0.03 = $ 165

Cost of making 20 windows =  7830 + 165 = $ 7995

You might be interested in
What is the difference between 4/5- 1/2 *
alexira [117]

Answer:

0.3

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
You can afford a $1050 per month mortgage payment. You've found a 30 year loan at 7% interest.
anyanavicka [17]

9514 1404 393

Answer:

  • loan: $157,823
  • repaid: $378,000
  • interest: $220,177

Step-by-step explanation:

For a loan value of 1, the monthly payment on a 30 year loan at 7% is ...

  A = (0.07/12)/(1 -(1 +0.07/12)^(-12·30)) ≈ 0.00665302495

Then the amount repaid after 360 payments is ...

  360A = 2.39508898 . . . times the principal amount

__

a) For a monthly payment of $1050, the principal can be ...

  $1050/0.00665302495 ≈ $157,823

__

b) The amount repaid to the loan company is ...

  $157,823×2.39508898 ≈ $378,000

__

c) The amount that is interest is ...

  $378,000 -157,823 = $220,177

8 0
3 years ago
Help pls and thank you :)
klio [65]

Answer:

The one on the bottom right

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Is this a function? plz help me i need help
LenaWriter [7]

Answer:

yes it is

Step-by-step explanation:

4 0
3 years ago
One day there is an accident and the tank cracks in 4 places. Water flows out of each crack at a rate of 12 liter per hour. An e
valentinak56 [21]
What’s the question?
5 0
3 years ago
Other questions:
  • It would be so greatly appreciated if you could help me with my geometry work!!!!
    6·1 answer
  • Use the formula SA=6s2 , where SA is the surface area and s is the edge length of the cube, to solve this problem. Gavan must pa
    10·1 answer
  • Sharon is paving a rectangular concrete driveway on the side of her house. The area of the driveway is 5x^2 + 43x - 18, and the
    15·2 answers
  • What is the difference between discrete and continuous data? (Bar charts)
    9·1 answer
  • One third of a birds eggs hatched. If 2 eggs hatched, how many eggs did the bird lay?
    13·2 answers
  • 4(x-5)=18 what does x equal
    8·2 answers
  • Can someone help me with these? And with work?
    15·2 answers
  • Dave collects U.S. gold coins. He has collection of 48 coins. Some are $10 coins, and the rest are $20 coins. If the face value
    12·1 answer
  • Lara wrote the following statement:
    11·1 answer
  • 3 times x plus 4 is no less than 4 times the sum of x and 1
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!