The equation 680(0.87)t=340 can be used to find the time, t, in years, it takes for 680 grams of a radioactive element to decay to 340 grams. To solve the equation 680(0.87)t=340, a student graphs the equations y=680(0.87)t and y=340.

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.