this is a product grade due in like 30 minutes... so can i get an explanation for each answer please? i'll get kicked off the soccer team if i fail this so please help.

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

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.