7k-3=6k what does k equal

What is the rule for reflection across the y axis

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

Which of the following is equal to the rational expression when x is not equal to -2 or -6?