Idon't know the answer to this and the hints not so ?

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

The trigonometric ratios sine and secant are reciprocals of each other

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?