10 is a common factor of 50 30 and 100. So is 2
I’ve provided both the answer and explanation below! Hope this helps :)
Answer:
The value of b is, 8
Step-by-step explanation:
To determine the value of b:
Given:
....[1]
Since, 0x6A represents the hexadecimal form.
To convert this hexadecimal form into decimal form:

⇒
(decimal form)
Now we have to convert this decimal form into octal
8 | 106
8 | 13 | 2
| 1 | 5
1
Then, the octal form we get, 
Substitute this in [1] we have;

On comparing both sides we have;
b = 8
Therefore, the value of b is, 8
For x y chart 19.36.2.27.13
He paid him : 24t + 15
for 3 hrs...
24(3) + 15 = 72 + 15 = $ 87