Martha invested a principal amount of $15,000 into a savings account that earns simple interest at a rate 4.5% per year. how much money will she earn in interest over 6 years?

For which pair of functions is (gof)(a)=|a|-2?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?