Di antara kumpulan berikut, manakah yang termasuk himpunan dan yang bukan termasuk himpunan, berikan alasannya. A. Kumpulan bintang bekaki dua.
B. Kumpulan siswa yang cerdas.
C. Kumpulan buku yang tebal.
D. Kumpulan siswa yang tingginya diatas 160 cm.
E. Kumpulan lukisan indah.​

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

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.