The ice cream shop has 80 different possible sundaes which include 1 flavor of ice cream, 1 syrup, and 1 candy topping. if the ice cream parlor has 5 different syrups and 4 different candy toppings to choose from, then how many flavors of ice cream does it have?

80 = 5 x 4 x 4

they have 4 flavors of icecream

you get this by multiplying all the variables and how many different possibilities each variable can be

so,
5 different syrups (5)
4 different candy toppings (4)

from that you know 5 x 4 x ? = 80

so 5 x 4 = 20, and 20 x 4 = 80

so 4 different flavors of ice cream (4)

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.