Emma ran 5 miles each day for one 1 month. the next month she ran 6.5 miles each day. what percent did emma increase her mileage for the second month?

y=44

We see that there are two angles by the name of "y". Because of this, the triangle is isosceles, meaning that both the angles are the same. Now that we know this, we can find the other angle. Let's call it angle 1.

using sum of angles in a triangle:

m<1= 180-88 .  | this is because of supplementary angles

m<1= 92 .         | algebra

y=180-(92+2y) | sum of angles in a triangle

y=44                | algebra

We can also find it using the exterior angle theorem

2y=88

y=44