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 $x = 1.5$?\
\bigcirc $12x^2 - 6$; 21 inches\
\bigcirc $12x^2$; 27 inches\
\bigcirc $12x^2 - 6$; 30 inches\
\bigcirc $12x^2$; 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 $x=1.5$

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

Answer:

A. 12x²−6; 21 inches