3m = 7, so m = 7/3
k = 6m = 6(7/3) = 14
j - k = 9 so, j = 9 + k = 9 + 14 = 23
Therefore, -5j = -5(23) = -115
Minah F.
asked • 02/27/15SAT PREP 2015
If j-k=9, k=6m, and 3m=7, what is the value of -5j?
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Russ P. answered • 02/27/15
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Minah,
Just solve these equations individually starting with m and "follow the string" to k, j and finally -5j.
So 3m =7 means m=7/3 and 6m = 6(7/3) = 14, so k = 6m = 14.
Then (j-k) = 9 means j = (k + 9) = (14 + 9) = 23
Finally -5j = -5(23) = - 115.
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