This is my statistics work assignment: (Question provided in image link) 100 pts to the solver

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

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.