The quadratic function which describes the given points (0,6) and (3,-15) on a graph is ​f(x)=

When you answer this can you explain

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4