No, 243 is not a prime number, it is a composite number.
I hope I helped you again :-)
Question is:
Fill in the blanks to solve
.
Answer:

Step-by-step explanation:
Given

Required
Solve
Multiply both sides by x


Make x the subject


Answer:
$43.35 (I believe)
Step-by-step explanation:
I tried to find the price to fill up 1 gallon by dividing the $30.60 by 12. 30.6/12 = 2.55 and then I multiplied $2.55 by 17 and got $43.35