<PRE><B>Question 53718</B>
1. 8n if n=15
Substitute 15 in where the n is.  Since there is nothing between the 8 and the n it means to multiply.
8(15)=120
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2. 12m+2 if m=4
Substitute 4 in for m, multiply first then add.
12(4)+2
48+2=50
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3. 5n-2 if n=4
Substitute 4 in for n, multiply first then subtract.
5(4)-2
20-2=18

Happy Calculating!!!!</PRE>