Answer
91
Step-by-step explanation:
62+27+x=180
Let M represent the cost of a whiteboard marker.
10(3M + $2.75) = $177.50
3M + $2.75 = $17.75
3M = $15
M = $5
Hence, each whiteboard marker cost $5.
The answer is the last one, the expression is already in the simplest form.
The answer is: 
The explanation is shown below:
1- You have the following expression given in the exercise:

2- When you multiply signs, you obtain:

3. Now, you must add like terms, as following:

4. Therefore, you have that the expression simplified is:

Answer:
1/343
Step-by-step explanation:
If you multiply 1/7*1/7*1/7 (1/7^3) then you would get 1/343.