Answer:
Firstly, we have to transform CHF to
in order to work with the same currency and make the comparisson:
If 

Then:

Now we can make the comparisons:
a) In Geneva the watch costs
and in Manchester it costs
.
According to this:
<h2>In Geneva the watch is cheaper</h2>
b) If we want to know by how much is cheaper, we have to substract from the expensive price the value of the cheaper price:
Therefore:
<h2>The watch in Geneva is

cheaper than the same watch in Manchester.</h2>
Answer:
(16/3,-4)
Step-by-step explanation:
- y=-3/4x & y=3/2x -12
- then solve for x which means -3/4x=3/2x-12
- then the value of x=16/3
- put the x value in one equation
- y=3/4(16/3)
- then the value of y=-4
Answer:
3
Step-by-step explanation:
Answer:

Step-by-step explanation:
When adding rational numbers, if the denominator is the same you simply keep the denominator (bottom of fraction) as it is and apply the operation given to the numerator ( top of fraction )
So we have 
==> remove parenthesis and apply signs

==> simplify numerator by combining like terms

and we are done!
Note:
like terms are terms with the same variable and exponent
An example of like terms are 6x^7 and 3x^7 as they have x as a variable and a power of 7
The like terms being combined here were (6x² and 4x²) and (5 and -2)