Let x be the age of the teacher.
We know that 7x is a three digit number.
Writing 6 after this number means to multiply this number by 10 (this adds a zero after the number) and then add 6.
So, we actually only need the last information:

Solving this equation is quite trivial: subtract 7x and 6 from both sides and you get

This is indeed a two digit number, and if you multiply it by 6 it becomes 174, a three digits number.
1. p=26/52
26/52=.5
50 percent
2. p=29/52
29/52=.56
56 percent
Answer:
4 hours at 8 mph and 6hours at 12 mph.
Step-by-step explanation:
8t + 12(10-t) = 104
8t + 120 - 12t = 104
4t = 16
t = 4
Let r denote radius.
To find circumference we use

To find area we use

Hope this helps.
7-5=2
You find the differences