Answer:
b=7
Step-by-step explanation:
We want to determine the positive base b in which:

The easiest way to approach this is to convert all the numbers to base 10.


Next, we factorize the resulting expression.

The positive value of b for which the equality hold is 7.
Answer: Coin B And Coin C
Step-by-step explanation:
$25. 25 x 3 is 75. Plus the 100 is 175. 200 - 175 is $25
Answer:
1
Step-by-step explanation:
The mode is the number that appears most often
1 appears twice in the data list and that is the mode