Answer:
35
37^2 - 12^2
1369 - 144 = 1225
find the square root of the difference
35
Answer:
$223.
Step-by-step explanation:
Let x be the original price of phone.
We are told that Terry sees this offer refurbished phone 35% off now only $78.
We need to find x such that 35% of x is 78. We can represent this information as:


Therefore, the original price of phone was $223.