Lilly needs at least $400 to buy a phone. Her mom gave her $60 and she earns $10 a day babysitting her little sister. How many days to reach goal? Write and solve the inequality.

Answer 1

Let x be the number of days Lilly babysits.
She needs to make 400-60=<<400-60=340>>340 dollars
She makes 10*x dollars
So 10x>=340
So she needs to babysit at least x>=34 days. Answer: \boxed{34}.