Which of the following is not true concerning warm-up exercises? a. they should be low-intensity. b. they should get progressively more intense. c. they should last 20 to 30 minutes. d. they should increase heart rate, breathing, and temperature. select the best answer from the choices provided. a b c d mark this and return save and exit

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

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Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k