Pls help on #2 #6 #9 and #20 please (If u get it right you’ll gets the big brain award or whatever)

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

Mila's dog weighs 4 pounds more than 8 times the weight of keiko's dog. which expression could be used to fine te weight of mila's dog?