Is -1/2n + 1 1/2n+3-n equivalent to 3? explain plz

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

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

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?