Well the total cost of the washing machine is 504. so that is it u can even use a calculator
I'm too late but here ya go anyway :)
x = 180 - (31 + 40) is the answer.
Answer: The number of different combinations of 2 vegetables are possible = 15 .
Step-by-step explanation:
In Mathematics , the number of combinations of selecting r values out of n values = 
Given : Number of available vegetables = 6
Then, the number of different combinations of 2 vegetables are possible will be :

Hence , the number of different combinations of 2 vegetables are possible = 15 .
The answer should have been 8.6 that was wrong but it is okay you were close