Ineed with number 2 on top

along with 10,12,14,16: 18,20,22

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m