Question

question
a triangle has side lengths of $(9.9c + 5.1d)$ centimeters, $(6.2c + 1.6f)$ centimeters, and $(2.5f + 6.2d)$
centimeters. which expression represents the perimeter, in centimeters, of the triangle?
answer
$8.7df + 7.8cf + 15cd$
$18.6cf + 12.9df$
$4.1f + 11.3d + 16.1c$
$8.7f + 6.7d + 16.1c$
submit answer

Explanation:

Step1: Sumar los lados del triángulo

$$(9.9c + 5.1d)+(6.2c + 1.6f)+(2.5f + 6.2d)$$

Step2: Agrupar términos semejantes

$$(9.9c+6.2c)+(5.1d + 6.2d)+(1.6f+2.5f)$$

Step3: Calcular las sumas

$$16.1c+11.3d + 4.1f$$

Answer:

$4.1f + 11.3d + 16.1c$