i finished all of these but i wanted to make sure these were correct! i will be posting others and thank you for answering :)

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

What multiplys to be 1 but adds up to be 4