Two accounts earn simple interest. The balance y (in dollars) of Account A after x years can be modeled by y=10x+500. Account B starts with $400 and earns 5% simple annual interest. Which account has a greater principal?
How much greater is the principal?

Which account has a greater annual interest rate?
How much greater is the annual interest rate?

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Find the value of x for which abcd must be a parallelogram -9-6x x-30

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms