Respuesta :
Answer:
5.60
Step-by-step explanation:
20% of 10 = 2 he gave 2 dollars to his sis
2 - 10 = 8 now lucas has 8 dollars
30% of 8 = 2.4 he gave 2.40 dollars to his bro
2.4 - 8 = 5.6
now he has 5 dollars and 60 cents
give me brainlest pls pls pls :>