A 139.5 g sample of carbon-14 is contained in an old fossil. If 17, 520 years pass, how much of of the carbon-14 in the fossil will be left? The half life of carbon-14 is 5730 years. Use the equations below to help you. Use k = -1.21 x 10-4 for the decay constant.

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?