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devlian [24]
1 year ago
12

Someone help me thanks! it's on pythagoras theorem btw ​

Mathematics
1 answer:
Amanda [17]1 year ago
6 0

Answer:

y = 3

Step-by-step explanation:

Pythag theorem :   ( only applies to RIGHT triangles)

    Hypotenuse ^2 = leg1 ^2 + leg 2^2

          (7y-1)^2        = (5y-3)^2   +  (5y+1)^2

            49 y^2 - 14y +1   =  25y^2 -30 y + 9    +  25y^2 + 10y + 1

                -y^2 +  6y  -9 = 0

            or   y^2 -6y + 9 = 0      solve by factoring or using Quadratic Formula

                    ( y -3)(y-3) = 0    shows   y = 3

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