Question

Which expression can be used to convert 22 Australian dollars to US dollars?

Assume 1.2 Australian dollars equals 1 US dollar.


$22 AUD ×

$22 AUD ×

$1.20 AUD ×

$1.20 AUD ×

Answer 1

$22 AUD x 1USD/1.2 AUD

Answer 2

The required expression for the conversion is:

`22\ Australian\ Dollar(AUD)=(22\ AUD* 1\ USD)/(1.2\ AUD)`

Explanation:

We are given that:

`1.2\ Australian\ dollar(AUD)=1\ US\ Dollar(USD)`

Hence,

`1\ AUD=(1)/(1.2\ AUD)\ USD------(1)`

Now we are asked to convert 22 Australian dollars to US dollars.

Hence, from conversion (1) we have:

`22\ Australian\ Dollar(AUD)=(22\ AUD* 1\ USD)/(1.2\ AUD)`