Question 1199201
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The problem says that  z = kx^2.


It also says that  50 = k*5^2 = 25k,  which implies  k = 2.


Hence,  z = 2x^2.


When x= 7,  z = 2*7^2 = 2*49 = 98.    <U>ANSWER</U>
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Solved, with complete explanations.



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