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 = 31, a = 7, b = 10 (perimeter of a triangle)

Explanation:

Step1: Substitute known values

Given $P = a + b + c$, substitute $P = 31$, $a = 7$, and $b = 10$. We get $31=7 + 10 + c$.

Step2: Simplify the right - hand side

First, calculate $7 + 10=17$. So the equation becomes $31 = 17 + c$.

Step3: Solve for c

Subtract 17 from both sides of the equation: $c=31 - 17$.
$c = 14$

Answer:

14