The first one should be the third option and the second one should be the first one.
No, because with the parentheses, you distribute the 2 to both the x and the 5, making that equation 2x-10
Answer:
No, he is not correct because the constant in his answer should have been 21 not 7.
Step-by-step explanation:

Therefore, the correct answer is the fourth; he should have put 21.
Answer:
negative pie/10 radians
Step-by-step explanation:
d on edg
Rate of change is slope
So change in y/change in x
150/3=50