book Maths Puzzle Numerical Ability

For the points P1 (-2,2) and P2 (4,10) find the distance. Please help me solve this problem. thanks

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book Other Question

A family plans to surrond their pool with a patio of constant width. The pool has an area of 150 square feet. The dimensions of the pool with the patio will be 15 feet by 20 feet. Find the dimensions of the pool. Please help with this word problem:

A woman made a deposit of $183. If her deposit consisted of 83 bills, some of them one-dollar bills and the rest being five-dollar bills, how many one-dollar bills did she deposit?

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