Answer:
The total number of U.S. high school students that played on a sports team that year can be estimated to be 7,950,000.
Step-by-step explanation:
From the random sample, we can expect that 
of all students played on a sports team that year. So in the bigger sample of 15900000 high school students, we can expect 
students to have played on a sports team that year.
Answer: 42 feet
Step-by-step explanation:
P-area of field
P=2100sqf
a-length of field
a=50 feet
P=a*b
2100sqf=50*b
b=2100/50
b=42 feet
Answer:
x<7
Step-by-step explanation:
use long division or synthetic division
I will use long
y-3 times y=y^3-3y
subtract that from y^2-y-11
we are left with
2y-11
multiply y-3 by 2 and get 2y-6
subtract that from 2y-11
get 5 as a remainder
answer is y+2+5/(y-3)
