Answer:
Then answer will still be the same, unless you have a number for a and x to multiply it
Step-by-step explanation:
25d^2-30d-35d+42=25d^2-65d+42.
Answer: 
Step-by-step explanation:
10 pens - 2 pens = 8 pens
Write 8 of 10 as a fraction.
You get
, right?
Now, simplify 8/10.
You get 4/5.
1 hour = 60 minutes
60 minutes / 10 minutes = 6
So 6 times in one hour 3 buses depart.
6 x 3 = 18 total buses in an hour.