Respuesta "b":
6000 = Precio * total ----> Precio = 6000/total
6000 = (Precio-100) *(total+3)
6000=(6000/total-100)*(total+3)
6000= (6000-100total/total)*(total+3)
6000= (6000-100 total + (18000-300 total/total)
6000 total = 6000 total -100total²+18000-300total
-100 total -300 total +18000=0
Total = 12
Respuesta "c":
12Ta + 12Tb = Ta*Tb
12(Tb+5)+12Tb =Tb(Tb+5)
12Tb+60+12Tb = Tb²+5Tb
Tb²-19Tb-60=0
Tb= 21 horas.
Ta = 26 horas.
Respuesta "d":
L²+104= (L+4)²
L²+104= L²+8L+16
104-16=8L
L= 11 cm
área = 11²= 121 cm²
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Verified answer
Respuesta "b":
6000 = Precio * total ----> Precio = 6000/total
6000 = (Precio-100) *(total+3)
6000=(6000/total-100)*(total+3)
6000= (6000-100total/total)*(total+3)
6000= (6000-100 total + (18000-300 total/total)
6000 total = 6000 total -100total²+18000-300total
-100 total -300 total +18000=0
Total = 12
Respuesta "c":
12Ta + 12Tb = Ta*Tb
12(Tb+5)+12Tb =Tb(Tb+5)
12Tb+60+12Tb = Tb²+5Tb
Tb²-19Tb-60=0
Tb= 21 horas.
Ta = 26 horas.
Respuesta "d":
L²+104= (L+4)²
L²+104= L²+8L+16
104-16=8L
L= 11 cm
área = 11²= 121 cm²