What is the result of subtracting the second equation from the first? -3x+2y &= 7 & -3x-2y &= 4

Plz i want answer and i would appreciate it is is a b c or d

Shiny white dental insurance costs $258 per year. approximately one-third of insured people need a filling, which averages $110 each. 80% of insured people get a preventive check-up each year, and the average cost of this visit is $95. if you consider shiny white’s income and expenses, what is the expected value of each insured customer?

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin