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22 May, 13:08

Which expression can be used to model the statement "On Wednesday, Nathaniel earned $10 less than he earned on Tuesday"?

n+10

10-n

n-10

10

+3
Answers (1)
  1. 22 May, 13:10
    0
    Answer: n - 10 which is choice C

    Let's use an example. If Nathaniel earned $15 on Tuesday, and earned $10 less on Wednesday, then 15-10 = 5 dollars is the amount he earns on Wednesday.

    Now let's say he earned $27 on Tuesday, and still earned $10 less the next day, meaning that he earns 27-10 = 17

    Whatever he earns on Tuesday, subtract off 10. That's the rule to follow for this problem.

    (amount earned on Tuesday) - 10 = amount earned on Wednesday

    If n reprsesent the placeholder for "amount earned on Tuesday", then we can rewrite that equation as

    amount earned on Wednesday = n - 10

    In short, whatever 'n' is, subtract 10 off it. In the examples above, I used n = 15 and n = 27.

    note: the order of subtraction matters. The expression n-10 is not the same as 10 - n. If you subtract in the wrong order you may get a negative value (eg: 10 - 17 = - 7), but he can't earn a negative amount of dollars.
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