Each person in a group of students was identified by year asked
2 answers:
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15 = 3² +2(7-4)
____
The above expression includes operations of
- exponentiation
- subtraction
- multiplication
- addition
The exponent is 2.
I know the value of this expression is 15 because
- I designed the expression to have a value of 15
- I get a value of 15 when I evaluate the expression
- A reliable on-line calculator also gets a value of 15 when it evaluates the expression
