Surface are has a formula which is
SA=L*w+W*h+L*h
Answer:

Step-by-step explanation:




D=61d+30d=91d,
S=300+30d
S<D
300+30d<91d
300<61d
d>4.91 Since days are integers,
The skier would have to go at least 5 days to make the season pass less expensive than using the daily pass.
Answer: yes
Step-by-step explanation: slope is 4/3 and y intercept is 8
m= Y-20/0-9
4/3= y-20/-9
4/3 x -9 = y-20
-12 = y-20
Y=20-12
Y=8
Answer: x = 26
Step-by-step explanation:
Let's go step by step.

Check your answer.

That clearly doesn't work, showing how it has no solution.
^The answer above explained it better than me :P