Salma earns 57 dollars each week working part-time at a bookstore. she earns one additional dollar for each book that she sells.
earns 57 dollar
let a be the amount (in dollars) that salma earns in a week if she sells b books.
write an equation relating a to b. then use this equation to find the amount of money salma earns if she sells 21 books.

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.