A student investigated how the resistance of a piece of wire varies with its length. Explain why the student needed to adjust a variable resistor every time she changed the length of the wire

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?

Determine if the sequence is arithmetic or geometric.  then identify the next term in the sequence.    0.2, 1, 5, 25, . . group of answer choices arithmetic; 75 geometric; 75 arithmetic; 125 geometric; 125