Someone please help me solve this

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

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! : )

What is the graph of the function fx x+2/x-3?