Help with math! 10th grade math :)

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

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

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x