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Korvikt [17]
2 years ago
12

A wall of a building is 30 inches wide. 14 inches is concrete,10 inches is brick, and 6 inches is like stone. What fraction of t

he wall is concrete
Mathematics
1 answer:
Bas_tet [7]2 years ago
8 0

Answer:

46.67 %

Step-by-step explanation:

Total thickness = 30  

  14 of this is concrete      14/30 x 100% = 46.67 %

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Solve this problem???​
Svetllana [295]

The denominator of the first term is a difference of squares, such that

4<em>a</em> ² - <em>b</em> ² = (2<em>a</em>)² - <em>b</em> ² = (2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>)

So you can write the fractions as

(4<em>a</em> ² + <em>b</em> ²)/((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>)) - (2<em>a</em> - <em>b</em>)/(2<em>a</em> + <em>b</em>)

Multiply through the second fraction by 2<em>a</em> - <em>b</em> to get a common denominator:

(4<em>a</em> ² + <em>b</em> ²)/((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>)) - (2<em>a</em> - <em>b</em>)²/((2<em>a</em> + <em>b</em>) (2<em>a</em> - <em>b</em>))

((4<em>a</em> ² + <em>b</em> ²) - (2<em>a</em> - <em>b</em>)²) / ((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>))

Expand the numerator:

(4<em>a</em> ² + <em>b</em> ²) - (2<em>a</em> - <em>b</em>)²

(4<em>a</em> ² + <em>b</em> ²) - (4<em>a</em> ² - 4<em>ab</em> + <em>b</em> ²)

4<em>ab</em>

<em />

So the original expression reduces to

4<em>ab</em> / ((2<em>a</em> - <em>b</em>) (2<em>a</em> + <em>b</em>))

or

4<em>ab</em> / (4<em>a</em> ² - <em>b</em> ²)

upon condensing the denominator again.

8 0
3 years ago
Jack is planning to apply for a new credit card and needs to compare two offers. Complete the table based on the information in
nignag [31]

Answer:

Enjoy, Glad i could help

Step-by-step explanation:

4 0
2 years ago
A flower pot has a radius of 10 inches. Evelyn wants to tie a ribbon around the pot. How long does the ribbon have to be in orde
mariarad [96]

Answer:68.5

Step-by-step explanation:

3 0
3 years ago
Answer These Questions and show your work to be brainliest
Andre45 [30]
1.     20 of 40 is 50%      20/40 = 1/2    1/2 = 50%

2.  It is 20% because 600 is 20% of 3000

3.   40% of 30 = 12   50 = 15    10% = 3 (get it)

4, 40% of 65 = 26    50%= 32.5 (get it)
3 0
4 years ago
If M is the Midpoint of AB, then solve for x find the unknown measures the given segments.
Leto [7]

Answer:

If M is midpoint of AB, then

AM=MB

4x-5= 2x+11

2x=16

x=8

AM= 4x-5

=4(8)-5

=32-5

=27

BM=2x+11

=2(8)+11

=16+11

=27

Hope it helps:-)

8 0
3 years ago
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