Toby goes on holiday to geneva, switzerland. in geneva, toby sees a watch costing 193.75 chf (swiss francs). in manchester, an identical watch costs £143 given that £1 = 1.55 chf a) in which city is the watch cheaper? b) by how much is it cheaper (in £)?!

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:

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:

Step-by-step explanation:

1.55 CHF =  ?1

Cost of watch in Geneva in ?1

1.55 CHF =  ?1

193 CHF = ?  ?1 which we could call x

1.55 = 1

193  = x

Cross multiply

1.55x = 193         Divide by 1.55

x = 124.52           in x units.

But the merchants in Manchester are charging 143 x units

So 143 - 124.52 = 18.48 units more expensive in Manchester.

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:

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:

The answer is in the image 

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

The answer is in the image 

For every 8 cars there are 7 trucks

Therefore,

Cars:Truck=8:7

Answer is B)8:7

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales