Find the equation for the line that is parallel to the line with the equation y=-1/2x-11/2 passing through the point (0,-1)

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck

Having a hard time understanding this question (see attachment).