Answer:

Step-by-step explanation:
We are given,
.
It is required to find the value of y.
Now, on simplifying above equation, we get,

i.e. 
i.e. 
i.e. 
Hence, the missing term is
.
You just have to get x and y by themselves so solve and plug in
Answer:
277.5m²
Step-by-step explanation:
Just multiply.
Answer:
100 years old
Step-by-step explanation:hope it helps:)