Pablo folds a straw into a triangle with side lengths of 4x2-3 inches, 4x2-2 inches, and 4x2-1 inches. Which expression can be used to find the perimeter of the triangle, and what is the perimeter when x = 1.5? 12x2 - 6; 21 inches 12x2; 27 inches 12x2 - 6; 30 inches 12x2; 36 inches

Expression is 12x²-6

when x is 1.5, perimeter would be 21

Step-by-step explanation:

Perimeter can be found by adding all the sides in a triangle. We have three sides whose lengths are 4x²-3, 4x²-2 and 4x²-1. We should combine the like terms 4x²+4x²+4x²=12x² - 3-2-1=-6 so the expression for the perimeter is 12x²-6

When x is 1.5, we should plug in 1.5 for the x.

12 * 1.5*1.5 - 6 = 21

option a is your answer trust me