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Use the data on the dot plot to answer the question. how many people read for more than three hours last week? i'm on a unit test review

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)