Truth table ~p then ~q

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06