Answer:
= 

Step-by-step explanation:
let the number be x , then :
six added to twice the sum of a number and four means :

one half of the difference of three and the number means :


combining the two , we have
= 

Answer:
Step-by-step explanation:
2x²-13x+21+6x²+29x-5
=8x²+16x+16
I think it's none because that should be communitive and that's not there so.
10.125 as a percentage is 1012.5%