Question

Matilda needs at least $100 to in her savings account to keep it open. She already has $330 but withdraws $11 a month for fun. Write and solve an inequality to find how many months she will be able to keep her account open. Interpret the solution.

Answer 1

Explanation:

Step one:

given data

we are told that she wants her balance to be at least $100

y=100-------1

the expression relating her current balance and spending rate is

let y be the total and m be the number of months

y=330-11m----------2

Required

the number of months m

equating 1 and 2 we have

100=330-11m

11m=330-100

11m=230

m=230/11

m=20.9

m=21 approx

This means that she will keep her account open for 1 year 9 months