PLEASE HELP ASAP!!! Determine if the sequence is arithmetic. If it is, what is the common difference?36, 33, 30, 27, ... Thank you!
Shipping Company A charges $14 plus $2.25 a pound to ship overnight packages. Shipping Company B charges $20 plus $1.50 a pound to ship an overnight package. For what weight is the charge the same for the two companies?