To find the area you do base times height. Base is the number across,and height is the number that is up and down.So in this case you will multiply 9 and 5 and 9 and 7 and get 45 and 72.Then you will add 45 and 72 together and get 117. So the area is 117. Answer 117. Hope this helps :D.
16z because you’re adding 4z four times
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the answer is (x,y)=(-2,-3)
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D has no solution
I hope this helps a little bit.