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melomori [17]
3 years ago
11

if a rectangle has a perimeter of 70, a length of x and a width of x-9, find the value of the length of the rectangle. A)4, B)31

, C)13, D)22
Mathematics
2 answers:
stich3 [128]3 years ago
6 0

Answer:

It is 22 :)

Step-by-step explanation:


kolezko [41]3 years ago
5 0
The answer is D) 22
X = 4
Length = 4
Width = - 5
Perimeter = 8 + -10
Perimeter = - 2

X = 31
Length = 31
Width = 22
Perimeter = 62 + 44
Perimeter = 106

X = 13
Length = 13
Width = 4
Perimeter = 26 + 8
Perimeter = 34

X = 22
Length = 22
Width = 13
Perimeter = 44 + 26
Perimeter = 70
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Answer:

6.25 %  of area of Large triangle =  area of smallest triangle

Step-by-step explanation:

Area of large triangle L = (1/2)*base*height

L = (1/2)*(44 m)* h

L = 22*h  square m.

2nd equilateral triangle area:  S =(1/2)*(22 m)*(0.5h)

S = 5.5*h sq. m.

3rd smallest equilateral triangle area : T = (1/2)*(11 m)*(0.25h)

T = 1.375*h sq. m

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Find percent P  where  T = P* L,     1.375*h = P * 22*h

P = 6.25%  = 0.0625

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