The mean of five numbers is 16.4 .
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The given expression 5x+3x²-7x³+2 is a cubic expression.
<h3>What is a cubic expression?</h3>A cubic expression is a three-dimensional algebraic equation of the form ax³ + bx² + cx + d = 0, where the coefficients are a, b, and c, and the constant is d.
In order to classify the given expression as 5x+3x²-7x³+2, we need to rearrange the given expression,
Since the highest power that is in the expression is 3, therefore, the given expression is a cubic expression.
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