Emanuel has 745 pictures in his phone. his memory is getting full, so he starts deleting 20 pictures everyday. define each variable and write an algebric expression to describe the number of pictures left on his phone after any given number of days.

Evaluate cos2θ for cosθ = square root of 3/2

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

Anyone know these questions? i need ,.