Respuesta :

y / 21 = 4/y
y^2 = 84
y = 2√21

x/4 = 25/x
x^2 = 100
x = 10

x = 10 and y = 2√21

answer is B

x = 10 and y = 2√21
 
B:
y / 21 = 4/y
y^2 = 84
y = 2√21
x/4 = 25/x
x^2 = 100
x = 10
x = 10  y = 2√21