The Hall family and the Gray family each used their sprinklers last summer. The water output rate for the Hall family's sprinkler was 40 L per hour. The water output rate for the Gray family's sprinkler was 35 L per hour. The families used their sprinklers for a combined total of 75 hours, resulting in a total water output of 2800 L. How long was each sprinkler used

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

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c) the x-coordinate of the center of the circle increases by 3

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