Katie and Margarita have $20.00 each to spend at Students' Choice book store, where all students receive a 20% discount. Katie wants to purchase a book which normally sells for $22.50 and Margarita wants to purchase a book which normally sells for $22.75. With a sales tax of 10%, can Katie and Margarita buy their books? Use algebraic expressions to describe your steps to find the answer.

i can ! i just need to know what the paragraph is! : p

i have no clue hope you find the answer

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.