Q1
Answer:

Step-by-step explanation:

explanation for second step:
you divide each side by 3 to get rid of the '3' in '3x'
Given 12−(−2) over a line 12−6÷2
We can use PEMDAS rule and solve the expression in the order as given below:-
1. Parentheses
2. Exponents
3. Multiplication
4. Division
5. Addition
6. Subtraction
Now solving for given expression:-

So final answer is 14/9 i.e. 14 over 9.
2075-1195=880$ is the amount of increase
880/1195=0,74 now you only need to multiply with 100
0,74*100=74%
So the price increased by 74%
You don't say if the answer needs to be rounded
the height is 77.27 meters ( not rounded)
see attached picture for solution: