Answer:
The inequality can be represented as:

where
represents the number of weeks in which Maria will be able to buy a phone for least $200.
On solving it we get : 
Step-by-step explanation:
Given:
Maria wants to buy a phone for at least $200.
She has savings of $125.
She plans to save $10 every week.
To write an inequality for the situation.
Solution:
Let the number of weeks in which Maria will be able to buy a phone be = 
If she saves $10 each week.
Then, in
weeks she will save in dollars = 
She already has savings = $125
So her total savings in
weeks in dollars will be = 
She wants to buy a phone for at least $200.
Thus, the inequality can be represented as:

Solving for 
Subtracting both sides by 125.


Dividing both sides by 10.


Thus Maria needs at least 7.5 weeks to be able to buy a phone for atleast $200.