Bill changes £450 from his bank and gets $729.
Gwyll changes £500 from another bank and gets $780
A) What exchange rate did Bill get from his bank? £1 = $
B) What exchange rate did Gwyll get from his bank? £1= $
C) Who got the better deal?

Bill got more ($1.62) for each pound exchanged than did Gwyll ($1.56).

Step-by-step explanation:

Let's calculate the unit rate in each case, that is, the number of dollars obtained through exchanging one (1) pound for dollars:

Bill:

$729

= $1.62 per pound

£450

Gwyll:

$780

= $1.56 per pound

 £500

Bill got more ($1.62) for each pound exchanged than did Gwyll ($1.56).

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2