Consider this equation tan(0)=3√5/2 if 0 is an angle in quadrant I, what is the value of cos(0)​

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?