Answer:
The number is -6
The second operation is -60
Step-by-step explanation:
Let the number be x.
Solving (a): The value of x
Operations 1:
Multiply by 3: 3x
Add 40: 3x + 40
Operations 2:
Add 17: x + 17
Multiply by 2: (x + 17) * 2
To find x, equate both operations.


Collect like terms


Solving (b):
Operations:
Subtract 9: 
Multiply by 4: 
This gives:



You round the number to the nearest 100 :- So 265 is closer to 300 that it is to 200 so you use 300.
436 is closest to 400 then 500 so we use 400.
so the estimate is 300 + 400 = 700.
7^2=12^x
this implies that:
ln7^2=ln 12^x
2ln 7=x ln 12
x=(2 ln 7)/ln12
thus
12^2x=12^[2((2 ln 7)/ln12)]
=2401
Answer: 2401