19, Find the coordinates of the orthocenter of a triangle with vertices at each set of points on a coordinate plane. SEE EXAMPLE 5 a. (0, 0), (8, 4), (4, 22)

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

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