Which expression below is equal to 5, Mathematics

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Which expression below is equal to 5?

The correct order of operations must be used here. PEMDAS tells you in which you should do the operations in the subsequent order:

Parentheses, Exponents, Multiplication and Division-left to right,
Addition and Subtraction-left to right.
9 - 22 = 9 - 4 = 5
a is (1 + 2)2 = (3)2 = 9
c is 11 - 10 × 5 = 11 - 50 = - 39
d is 45 ÷ 3 × 3 = 15 × 3 = 45

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