2 (N + 3)
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sum - means addition less - means subtraction twice - means multiply by 2
The question cannot be answered because it is ambiguous. Does "twice the sum of 16 and a number" mean "2*16 + x" or does it mean "2*(16 + x)"
The number could be -12.5326 or 10.5326 (approx).
If you mean rolling at least one three, the 1/3. If you mean exactly one three, then 5/18. and If you mean a sum of 3 for the two throws, the answer is 1/18
This is an algebraic expression. It can be written as 3(2x + 4)