Can someone me with this? explain

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

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?

Factor the polynomial expression x6 – x3 – 20