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son4ous [18]
3 years ago
5

What is the percent decrease from 120% to 90%

Mathematics
1 answer:
boyakko [2]3 years ago
7 0
30% decrease. 

120-90 = 30
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4+n divided by 43+n equals to 1/3 what is n?
Mariana [72]

Answer:

n = 15.5

Step-by-step explanation:

(4+n)/(43+n) =1/3

3(4+n)= 1*(43 + n)

12 + 3n = 43 + n

3n - n = 43 - 12

2n = 31

n = 31/2= 15.5

8 0
3 years ago
Plz help.<br><br> Find the perimeter of the window to the nearest tenth.
Stels [109]
Let's solve this problem step-by-step.

STEP-BY-STEP EXPLANATION:

First, we will establish that the shape of the window is a semi-circle. This means we must use the formula for the perimeter of a semi-circle to obtain the perimeter of the window.

The formula for the perimeter of a semi-circle is as follows:

Let perimeter of window or semi-circle = P

P = [ 2( Pi )r / 2 ] + 2r

Where r = radius of circle or semi-circle

From this, we will simply use the value of the radius given from the diagram in the problem and substitute it into the formula to obtain the perimeter of the window.

P = [ 2( Pi )r / 2 ] + 2r

r = 20

THEREFORE:

P = [ 2( Pi )( 20 ) / 2 ] + 2( 20 )

P = 20( Pi ) + 40

P = 102.83...cm^2

P = 102.8cm^2 ( to the nearest tenth )

FINAL ANSWER:

Therefore, the perimeter of the window is 102.8cm^2 ( to the nearest tenth ).

Hope this helps! :)
Have a lovely day! <3
4 0
3 years ago
Read 2 more answers
The length of a rectangular flower garden is 9 feet and it’s width is 5 feet how many feet of fencing will be needed
Tju [1.3M]
Use the simple perimeter formula.
P = 2L + 2W
P = 2(9) + 2(5)
P = 19 + 10
P = 29ft

Therefore 29ft of fencing will be needed.
8 0
3 years ago
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Triss [41]

Answer:

The mean is 8.

Step-by-step explanation:

The mean is the sum of a set of numbers divided by the number of numbers in a set. In this case, you add up all the numbers to get 56, and divide by 7 to get 8.

5 0
3 years ago
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Lateral area of cylinder with r=4 h=5​
yulyashka [42]

Answer:

formula: 2πrh

Step-by-step explanation:

2πrh= 2×π×4×5≈125.66371

3 0
3 years ago
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