Question

substitute the given values into the given formula and solve for the unknown variable. if necessary, round to one - decimal place. p = a + b + c; p = 32, a = 9, b = 11 (perimeter of a triangle) c = □

Explanation:

Step1: Substitute given values

Given $P = 32$, $a = 9$, $b = 11$ into $P=a + b + c$. So we have $32=9 + 11 + c$.

Step2: Simplify the right - hand side

First, calculate $9+11 = 20$. The equation becomes $32=20 + c$.

Step3: Solve for c

Subtract 20 from both sides of the equation: $c=32 - 20$.
$c = 12$

Answer:

$12$