Answer: D
Explanation:
The given expression is 2w3 + 7w2 - 4w.
The power of the expression is the highest exponent of the variable w, which is 3. However, this is not one of the options given.
A factor of the expression is a term or expression that divides the given expression completely. -4w is not a factor of the given expression.
The coefficient of a term is the numerical factor that is multiplied by the variable. The coefficient of the first term 2w3 is 2, and the coefficient of the second term 7w2 is 7. The coefficient of the last term -4w is -4. Therefore, the statement "The coefficient of the expression is w" is false.
The given expression has three terms: 2w3, 7w2, and -4w. Therefore, the statement "The expression has 3 terms" is true.