I really need help with this and I have no idea how to do this.
The label on the car's antifreeze container claims to protect the car between −40°C and 125°C. To convert Celsius temperature to Fahrenheit temperature, the formula is C = 5 over 9 (F − 32). Write and solve the inequality to determine the Fahrenheit temperature range at which this antifreeze protects the car.

Question

I really need help with this and I have no idea how to do this. 
The label on the car's antifreeze container claims to protect the car between −40°C and 125°C. To convert Celsius temperature to Fahrenheit temperature, the formula is C = 5 over 9 (F − 32). Write and solve the inequality to determine the Fahrenheit temperature range at which this antifreeze protects the car.

anonymous · Answer

−40 > 5 over 9 (F − 32) > 125; −40 > F > 257 −40 < 5 over 9 (F − 32) < 125; −40 < F < 257 −40 < 5 over 9 (F − 32); −40 < F 5 over 9 (F − 32) < 125; F < 257