1.5x+10
The total would be $41 for Noah and Nick combined.
Knowing how to set this up as of it were a graph can help a lot. First realize that an EXPRESSION is needed and not an equation (with an equal sign). Next you see that you are automatically charged $10 so that would just be ADDED to the total amount of tickets that are also $1.50. To write this out you would do 1.5x (x being your amount of tickets) and 10 being the $10 fee.
Now we use this expression for Noah and Nick, since they BOTH rode 7 rides then it would be a total of 14 tickets. 1.5(14)=21. Since both of them had the entrance fee then 10 would be doubled and therefore 2*10=20. Add both up 20+21=41.
