An amusement park charges a $20 admission and $3 for each ride. Which equation can be used to determine c, the total cost of a day at the amusement park , based on n , the number of rides?

for each expression, we will simplify the numerical part as usual, while we will use the following properties to deal with exponents of variables:

rule #1:

rule #2:

rule #3:

first expression:

numeric part:

exponent for a (rule #1):

exponent for b (rule #1):

second expression:

numeric part:

exponent for a (rule #1 + #3):

exponent for b (rule #1):

third expression:

numeric part:

exponent for a (rule #1):

exponent for b (rule #1):

fourth expression:

numeric part:

exponent for a (rule #1 + #2 + #3):

exponent for b (rule #1 + #3):

fifth expression:

numeric part:

exponent for a (rule #1 + #3):

exponent for b (rule #1 + #2):

sixth expression:

numeric part:

exponent for a (rule #1 + #2 + #3):

exponent for b (rule #1 + #3):