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March 30, 2017

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If n is an integer, how many different values of n satisfy the inequality
-4 ≤ 3n ≤ 87?

a) 32
b) 31
c) 30
d) 29
e) 28

i got (b) 31 but I'm not sure.

  • Mathematics - ,

    -4 ≤ 3n ≤ 87
    divide by 3

    -4/3 ≤ n ≤ 29

    So you would have all the integers from -1 to 29
    from 1 to 29 would be 29 of them, plus the 0 and the -2 makes a total of 31
    You are correct.

  • Mathematics - ,

    Thank you so much

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