Third summative in mathematics 10 ​

The fastest measured pitched baseball left the pitcher's hand at speed of 45 m/s. if the pitcher was in contact with the ball over a distance of 1.50 m and produced constant acceleration, (a.) what acceleration did he give the ball and (b.) how much time did it take him to pitch it? ​

Guys how to solve the vertex of this equation? y=3x²-14x-5​can you help me?

It takes peter 6 hours longer than luis to do a certain job. together they do it in 4 hours. how long would it take each working alone to do the job? ​