Answer:
Carlos expect to make <u>$540</u> on an investments of $6000.
Step-by-step explanation:
Given:
Carlos thinks that he should make $9 for every $100 he invests.
Now, to get the amount Carlos expect to make on an investments of $6000.
Let the amount he expect to make on an investments of $6000 be 
As, Carlos thinks that he should make nine dollars for every $100 he invests.
<em>So, $100 is equivalent to $9.</em>
<em>Thus, $6000 is equivalent to </em>
<em />
Now, to get the amount using cross multiplication method:

<em>By cross multiplying we get:</em>
<em />
<em />
<em>Dividing both sides by 100 we get:</em>

Therefore, Carlos expect to make $540 on an investments of $6000.