The expression that has a value of 27 is +×(+)−.
To understand why this expression equals 27, let's break it down step by step:
1. Start with the innermost operation, which is the addition within the parentheses. Since there is no specific number given, we can use any number that will result in 27. Let's choose 30 as an example.
2. The expression now becomes +×(30)−.
3. Move to the multiplication operation, which is represented by the × symbol. Multiply the previous result (30) by an unknown number to get 27. In this case, the unknown number is 27/30, which is equivalent to 0.9.
4. The expression now becomes +(30 × 0.9)−.
5. Finally, move to the addition operation, represented by the + symbol. Add the previous result (30 × 0.9) to an unknown number to get 27. In this case, the unknown number is 27 - (30 × 0.9), which is equal to 4.3.
6. The final expression is +(30 × 0.9)−4.3, which simplifies to 27.
Therefore, the expression +×(+)− has a value of 27.