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How to solve for X.
first row (8 ,6) second row (6,5) +4X= first row (5,9) second row (4,4) ?

How to sketch a graph of this function and determine if f is continuous at x = 3?

When set the acceleration to the value required for the two balls to reach the finish line at the same time. Which of the following statements is/are true for this situation?
The balls has same acceleration
or same velocity or speed or al of above