Answer:
$8.85
Step-by-step explanation:
This a question of direct variation, so we can make out a relationship between the two factors. 12 is 2/3 of 18, so the cost of 12 would also be 2/3 of the cost of 18. We can now make an equation to solve.

It totally depends on the value of 'a', and if 'a' changes, then (6a-2) immediately changes too. Whatever 'a' is at the moment, (6a-2) is 2 less than 6 times 'a'.
Answer:
$114.75
Step-by-step explanation:
Answer:
<h2>C ,288</h2>
Step-by-step explanation:
<h3><em>hope this helps</em></h3>
I’m pretty sure there are infinite solutions as the system of equations are equivalent to each other.