Question

1 a triangle has side lengths of 15 centimeters, 11 centimeters, and 3.5x centimeters. the perimeter is 75 centimeters. a) 15+11+3.5x = 75 x = 14 b) some scribbled content

Explanation:

Step1: Set up perimeter equation

$15 + 11 + 3.5x = 75$

Step2: Sum constant terms

$26 + 3.5x = 75$

Step3: Isolate the variable term

$3.5x = 75 - 26$
$3.5x = 49$

Step4: Solve for $x$

$x = \frac{49}{3.5}$

Answer:

$x = 14$