Question

this isosceles triangle has two sides of equal length, a, that are longer than the length of the base, b. the perimeter of the triangle is 15.7 centimeters. the equation 2a + b = 15.7 models this information.
if one of the longer sides is 6.3 centimeters, which equation can be used to find the length of the base?

Explanation:

Step1: Substitute the value of \(a\) into the equation

Given \(a = 6.3\) and the equation \(2a + b=15.7\).
Substitute \(a\) into the left - hand side of the equation: \(2\times6.3 + b\).

Step2: Write the new equation

The new equation is \(2\times6.3 + b=15.7\).

Answer:

\(2\times6.3 + b = 15.7\)