Number 2 is 25 that fors sure but i dont wanna give you the 3rd i dont know why bt i dont :/
Imagine that the variable c represents something tangible, like an orange. So what this equation is asking is subtract 1 orange from 12 oranges. So you are left with 11 oranges.
Another way to think about this problem is if you rewrite the equation slightly to:
12c - c =
12c - 1c =
11c
C would be the answer. When you simplify the equations C does not contain a radical.
You have to multiply the number of dollars times the conversion ratio is used in this way.
If you use the nearest hundredth approximation of the conversion ratio you have to use 1.35 instead the real exchange ratio of 1.35261
So, if they change Eu 1 will receive $ 1.35 instead of $ 1.35261.
If they change Eu 10 will receive 10 × 1.35 = $ 13.5, instead of $13.5261
If they change Eu 100 will receive 100 × 1.35 = $ 135, instead of $135.5261
If they change Eu 1,000 will receive 1000 × 1.35 = $ 1350, instead of $ 1352.61
So, you see the lose is $ 2.61 per every 1000 Euros they change.
