Answer:
-25
Step-by-step explanation:
when b = 6
sub b = 6 into b^2-9b-7
6^2-9(6)-7
36-54-7
36-61
-25
Add the x's
SO 3x=18
divided by 3
So x=3
You square root both sides. And it would be a=0.8
Answer: answer is A and B on khan (the subset consists of all the matches where Manchester United’s opponent did not lose) & (the subset consists) of all the matches where Manchester United did not win)
Step-by-step explanation: It’s right on khan academy
