-10.
(11-7x)^1/4 =3
(11-7x)=81
-7x=70
X=-10
48 percent of the kids are females and 52 percent are males
(4x+y)+5
20x+5y
20x+5y+0
third term is zero
1.923 * 10 ^ -35 is the answer I got, however you did not specify any formatting to the question, so others may get a completely different answer
