If a triangle has a side with 8cm and a side with 10 what it the other side

At his new job, jeremiah can choose an hourly rate of $9 plus a $50 weekly bonus for opening the store, or an hourly rate of $10 per hour with no opening bonus. the equations model his salary options. y = 9x + 50 y = 10x

Icould really use some with this question.

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0