exam Maths Puzzle Numerical Ability

Find the domain of y=1/(x+1)(x-3)
Write the domain in interval notation

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Word Problems- OMG!!
1. Clothing store needs to display 3 identical dresses, 2 identical skirts and 2 identical coats in the window. How many distinguishable displays are possibl Transpose this augmented matrix:
[ 1 8 7 9 ]
[ 0 2 5 1 ]
[-4 -1 0 17]