Question

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

Explanation:

Step1: Calculate perimeter expression

Perimeter = sum of sides: $(4x^2 -3)+(4x^2 -2)+(4x^2 -1) = 12x^2 -6$

Step2: Substitute x=1.5 into expression

$12(1.5)^2 -6 = 12(2.25)-6 = 27-6=21$

Answer:

12x² - 6; 21 inches (third option)