Find the x-coordinate of the vertex, y-coordinate of the vertex, and the z-intercepts. y=x^2+4x-5

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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b. f(x) = –√x + 3this is the correct answer

y = -1

x = 8

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