5. Freida goes to McDonald's with her friends. They buy 3 Big Macs, 1 Chicken Nuggets, 2 Fish-O-Filet, 6 French Fries and 6
Cokes. McDonald's also charges 8.25% sales tax. How much will
Freida and her friends pay for the meal, including taxes. If
Freida pays the cashier $80, how much change will she get back?

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.