He is wrong.
The factors of 91 are: 1, 7, 13, and 91.
He can make 13 teams of 7 or 7 teams of 13.
1.
1=87 corresponding angle.
2=180-87=93
2.
1=78 corresponding angles
2=78 verticle angles
3.
Set it up as (6x - 11) = 37
37 + 11 =48
6x = 48
x = 8
4.
Take 142 and see that it is supplementary to angle 2 so 180-142 = 38
38 is corresponding to the equation 2(x + 9)
So 2(x + 9) =38
Distributive property
2x + 18 = 38
38-18=20
2x =20
x = 10
Angle 2 is equal to 38 from supplementary to 142
I’m pretty positive about 1-3 but 4 maybe not be correct. But most likely these are correct
In this case, I say the answer is A because most short studies dont create valid samples. It all depends on what the short study was about...
115.20 is 20% of 576
576 x .20 = 115.20