Which of the following equations is a linear equation in one variable? A. 5x-3=4(x+y)
B. 2a+5b-c=2
C. 3m=8
D. x=2/y+5
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Name the most appropriate metric unit for each measurement like the mass of cow

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

Find cot x if sin x cot x csc x = √2