Answer:
The answer is "It is not a valid sample because it is not a random sample of the population".
Step-by-step explanation:
I had this test and that was my answer, and it was correct.
7x+3x=280
10x=280
x=28
John 7*28= 196$
Peter 3*28=84$
The answer is 85.Alternate Interior angles theorem.
25% because there are four sides and 25 is a fourth of 100