Simplify the expression: 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 . a. 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 b. 2√ 5 + 9√ 7 c. 2√ 20 − 4√ 7 − 2√ 5 d. 2√ 20 − 3√ 7 + 4√ 63

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