Final answer:
To simplify the expression 10-5(9n-9), distribute the -5 to both terms inside the parentheses. Combine the constants and combine like terms to obtain 55 - 45n.
Step-by-step explanation:
To simplify the expression 10-5(9n-9), we need to distribute the -5 to both terms inside the parentheses:
10 - 5 * 9n + 5 * 9
This gives us:
10 - 45n + 45
Since 10 and 45 are both constants, they can be combined to give us a final simplified expression of:
55 - 45n