Which two numbers are 4 units away from 0 on the number line?
a) 0 and 4
b) 2 and -2
c) 4 and -4
d) 4 and 8

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?