PLEASE HELP WITH THIS

Three times the sum of a number and seven is negative thirty-six. what is the number?

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9