Question

06-O valor de x + y é:

(A) 27 m
(B) 22 m
(C) 17 m
(D) 15 m
(E) 12 m​

Answer 1

Resposta:

${17}^{2} = {8 }^{2} + {y}^{2} \\ 289 = 64 + {y}^{2} \\ 225 = {y}^{2} \\ y = 15 \\ {15}^{2} = {9}^{2} + {x}^{2} \\ 225 - 81 = {x}^{2} \\ 144 = {x}^{2} \\ 12 = x \\ x + y = 12 + 15 = 27$