What are the vertex, the axis of symmetry, the minimum or maximum, the domain and the range of each function? 1. f(x) = 2(x - 4)2 + 3

2. f(x) = -(x + 3)2 - 2.5

3. f(x) = -2(x - 6)2

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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