Solution: Substitute $ n = 3 $: $ m(3) = 3^2 - 4(3) + 7 = 9 - 12 + 7 = 4 $. \boxed{4}1. A train travels 150 miles in 3 hours at a constant speed. If it continues at the same speed, how many miles will it cover in 5 hours?

Sun, 03 May 2026 08:11:37 +0000

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