Respuesta :

abbyisnotaqt

Answer:

2.6

Step-by-step explanation:

a = x, b = 3, c = 4  

a^2 + b^2 = c^2  ... pythagorean theorem  

x^2 + (3)^2 = (4)^2  

x^2 + 9 = 16  

x^2 = 16 - 9  

x^2 = 7  

x = sqrt(7)  

x = 2.64575131106459  

x = 2.6

Brainliest plz.?

sampadachetri

Answer:

3x+4x+x=90

8x=90

x=90/2

x=45

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