Jessica's training on the 400 meter relay race she's trained three times this week and took 46,52 and 45 seconds on her 400m races what is the maximum amount of time she can spend on her fourth race to average at most 51 seconds

Step-by-step explanation:

Sum of the amount of time spend on three training= 6 + 52 + 45

                                                                                   = 143 seconds

Average time = 51 seconds

Sum of the amount of time spend on four training's = 51 * 4 = 204

The maximum amount of time she can spend on her fourth race = 204 - 143

                                                                                                           = 61 seconds