2n + 9
let the number be n then twice the number is 2 × n = 2n
and 9 more than this means add 9 to, hence 2n + 9 is the expression
Answer:
C :)
Step-by-step explanation:
Answer:

Step-by-step explanation:

First you collect like terms
Then you add
Answer: If you want me to add the fractions it is 7/2 or 3.5
Answer:
f(5)= -85
Step-by-step explanation:
f(x)= 1-3x-61-10
now,
f(5)= 1-3×5-61-10
=1-15-71
=--85
hope u want this..