Determine whether the biconditional statement is true or false. If false, give a counterexample. An angle is a straight angle if and only if it is not acute.
false; m∠1 = 63°, ∠1 is not a straight angle
true
false; m∠1 = 102°, ∠1 is not a straight angle
false; m∠1 = 180°, ∠1 is not an acute angle

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