The mean of seven numbers is 12.0. when one new number is added , the average of eight numbers becomes 12.5 . what is the new number?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent