Which of the following expressions is equivalent to -9(n+10)?

Question

A. 9*n-90
B. -9*n+10
C. -9*n+90
D. -9*n-90

Answer 1

To simplify the expression \(-9(n+10)\), we can distribute \(-9\) across the terms in the parentheses:

\[ -9(n+10) = -9 \cdot n + -9 \cdot 10 \] \[ = -9n - 90 \]

Now, we can compare this result to the options given:

A. \(9n - 90\)
B. \(-9n + 10\)
C. \(-9n + 90\)
D. \(-9n - 90\)

The correct expression that matches our solution \(-9n - 90\) is option D: \(-9*n - 90\).

So, the answer is D.