Answer:
b.cost of party
c=20f
Explanation:
so we know the equation we have to use is c=20f
for part 2 we have to find out how much it's going to cost hank if 50 people attend his party;
so we know that 'c' is our unknown variable; now we write the equation filling in the 'blanks' with what we know-
c=20*50
now we multiply **remember that when you have a number and a letter right next to each other that they're being multiplied**
20*50
=1000
so hank will be spending $1000
good luck :)
hopefully, this helps
sorry i couldn't answer the last question
have a nice day !!