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
The circumference of a circle is 75.36 cm. What is the area in square
agasfer [191]

Answer:

A≈451.93

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Terance galloped 20 kilometers in 40 minutes. Then he trotted 6 kilometers in 120 minutes. By how much did his first rate exceed
SOVA2 [1]
20km/40min=0.5km per minute
6km/120min=6/120=1/20 or 0.05km per minute

0.5km/min is 10 times faster then 0.05km.min

His first rate exceeded his second rate by 10 times, or 1000%
5 0
3 years ago
What is the value of x?<br><br><br><br> Enter your answer in the box.
lubasha [3.4K]

Notice that based on the diagram, all of the sides of the triangle are the same length. (The dashes on the sides of the triangle show that the sides are of congruence.) This means that the triangle is an equilateral triangle. An important thing to note about equilateral triangles is that they all have angles of 60°. All angles in equivalent triangles are 60°.


This means that we can set 7x - 3 equal to 60 to solve for x:

7x - 3 = 60

  • Set up

7x = 63

  • Add 3 to both sides

x = 9

  • Divide both sides by 7

Our answer is x = 9.

8 0
3 years ago
The perimeter of a right triangle is 30 feet and the area is 30 square feet. If the lengths of the sides of the triangle are eac
liq [111]

Answer:

300

Step-by-step explanation:

a triangle has 3 sides and so perimeter is just adding all the sides together so the perimeter is 30 that means each side is ten so multiply those all by ten as it says and then they are all 100. add them to get 300, hope this helps :)

5 0
3 years ago
Will mark brainliest!
ioda

Answer:

the answer is A

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Priya measured the perimeter of a square desk and found 248 m. Noah measured the perimeter of the same desk and found 2468 mm. B
    5·1 answer
  • NEED HELP PLEASE IM BEGGING YOU PLEASE!!!!!<br> NEED HELP WITH BOTH PLEASE
    13·1 answer
  • Will give brainiliest to whoever answers it and gives it step by step please help me
    13·1 answer
  • Polygamy and its effect​
    6·1 answer
  • 2x+y=17 in slope intercept form
    14·1 answer
  • Why does (-5) (-5) (-5) have a negative product?
    6·1 answer
  • A tourism website claims travelers can see Europe for $75 a day. If a tourist saved $1,875 for a vacation, how many days can he
    5·1 answer
  • Which of the following graphs could represent the volume of water in a cylinder as a
    15·2 answers
  • How to find the number of students who like football or volleyball
    14·1 answer
  • Nowwwwww<br> will name brainliest
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!