Can anyone help me with this? I'm really not sure how to solve it.

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

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)