Total people x,
then, 3.5x + 5.5x + 6 = 51
simplify, 9x +6 = 51
subtract 6 on both sides, 9x= 45
divide by 9 on both sides, x= 5
therefore, total 5 people in the family.
Degree is the highest power of the polinomail
since higest poer is p^3, 3 is higest poer=degree
3rd degree
The answer to this equation would be 278.135