Apply the rules for order of operations to simplify 2+3-4+(5x4)

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

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.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?