Respuesta :

giangthaochung178

Answer:

BK=39/7

Step-by-step explanation:

because NQZ~CBK

so BK/QZ = TZ/KF

(4x+1)/(2x+7) = 27/45 = 3/5

5(4x+1) = 3(2x+7)

20x + 5 = 6x + 21

14x = 16

x = 8/7

=> BK = 4(8/7)+1 = 39/7

Answer:

the answer is 65

Step-by-step explanation:

2x+7/27 = 4x + 1/45

45(2x + 7) = 27(4x + 1)

90x + 315 = 108x + 27

108x-90x = 315-27

18x = 288

x = 288/18

x = 16

BK = 4x + 1

BK = 4(16) + 1

BK = 64 + 1

BK = 65