book Maths Puzzle Numerical Ability

1.Find the value of base e to 50 places. e=2.7182818284...
2.List all the subsets of {1,2,3,4}

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book Other Question

Hi, please help!

I am trying to solve the system of linear inequalities by graphing, however, I cannot locate an example on this problem:

x + 2y is less than or equal to 3
2
I just can not figure out how to set this one up.....and I need the answer quick. Please Help Me!!!!!

Ed and Dave are going to divide a cash prize of $14,000 in a ratio of 2 to 5. How much will Dave receive?