The kinetic energy (in joules) of a moving object can be calculated from the expression 1/2mv2, where m is the mass of the object in kilograms and v is its speed in meter per second. find the kinetic energy of a 0.145-kg baseball that is thrown at a speed of 40 meters per second.

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.