Question

The sum of the perimeters of two squares is 76 and the difference between their areas is 57 .

a ) If the length of the side of the square is x units , what will be its perimeter ?

b ) What is the difference between the perimeters of the squares ?

c ) ( x + y ) ( x - y ) = --------

d ) What are the lengths of the sides of the squares ?​​

Answer 1

Step-by-step explanation:

Parameters

Population mean = μ = ( Σ Xi ) / N

Population standard deviation = σ = sqrt [ Σ ( Xi - μ )2 / N ]

Population variance = σ2 = Σ ( Xi - μ )2 / N

Variance of population proportion = σP2 = PQ / n

Standardized score = Z = (X - μ) / σ

Population correlation coefficient = ρ = [ 1 / N ] * Σ { [ (Xi - μX) / σx ] * [ (Yi - μY) / σy ] }

Answer 2

Answer:

A]76x57=4332:B] 19:C]x-y :D] 133

Step-by-step explanation:

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