Answer:
22.
Step-by-step explanation:
The work is in the photo I attached, I think.
Let x be the number of rows.
If the number of rows is 7 less than the number of seats in each row, then the number of seats in a row is x+7. The total number of seats is
x·(x+7).
You know that a theater can seat 120 people, then
x·(x+7)=120.
Solve it:

The number of rows must be positive, then x=8.
Answer: there are 8 rows with 15 seats at each.
Answer: two over three
Step-by-step explanation:

line intercepts y at (0,-2)
Therefore, 
Substitute x = 3 in y =ax-2

To find the x-intercept, y = 0

The slope is 2/3
y-intercept is -2
So two over three
Answer:
R / 5 = -9
is that what u want if not i'll change it. :D