Take all five books and name them from one to five. From there you can arrange them in any order until you no longer get a different set of numbers. Start with 12345 and go from there.
example: 12345, 15234, 14523,13452 and so on.
1. (15+9)+12=36
2.(12+15)+9=36
The class spent $36
Note that when a number is to the power of 2, just multiply the number to itself once.
(-10)^2 = (-10)(-10)
(-10) x (-10) = 100
(Note that two negatives, when multiplied, will result in a positive answer)
100 is your answer
~<em>Rise Above the Ordinary</em>
Answer:
C) The standard deduction is $910 better than the Nedages’ deductions.