What is the discount on a stethoscope that is marked down from $300 to $250

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.

What are the solutions of the following system? y=-2x^2 y=x-2