The answer is 16(1/2)^n-1.

Now how to get answer without a calculator, I'm afraid I can't tell you an exact answer, but if you are allowed to use them in class, I THOROUGHLY recommend getting a graphing calculator for questions like these. You just have to plug in the equation and see what you get.

For a method without the calculator, take each x (2,3,4,5) and plug them into the equation and see which one will match up. It's a tedious method, but it'll help you get the correct answer.

I'm attaching the solutions.. please let me know if you have any questions.

Hope it helps.

**Answer:**

92

**Step-by-step explanation:**

**Answer:**

here are three types of triangle that differ from their side lengths.

1.Scalene

2. Isosceles

3. Equilateral

A triangle is scalene if all of its sides have different lengths.

A triangle is isosceles if two sides have equal measurements with each other.

A triangle is equilateral if all three sides have equal measurements with each othe

pls mark me the brainliest

**Answer:**

delete this

**Step-by-step explanation:**