It’s says 1/2 teaspoon per gallon bucket holds 26 gallons how many teaspoons?

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

Ineed to know the answer to this algebra question.

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?