Answer:
Step-by-step explanation:
Answer: n=4
Step-by-step explanation:

add 9 to both sides


divide both sides by -9

Brainliest please
Answer:
15 goals out of 50 penalty kicks was scored by brock
Step-by-step explanation:
If Brock shoots 50 penalty kicks and the probability that he scores a penalty kick is 3/10, the number of goal brock is expected to make can be expressed as:
Number of goals scored = probability value * total penalty kicks taken
Number of goals scored = 
Number of goals scored = 
17+x=57.
So, subtract 17 from both sides
X=40