Show why these calculations are equivalent in general. (Hint: Write an expression for finding an amount A minus n% of A. Write another expression for finding (100- n)% of A, and then use algebra to show that these two expressions are the same.)

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

Can someone me with my math problem pls my teacher is on my back about this