Respuesta :
Answer:
Hey, I see that this is your first question... Good luck! The answer is − 4 ≤ F ≤ 5
Step-by-step explanation:
Move all terms not containing F from the center section of the inequality.
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Answer:
-20≤5/9(F−32) ≤ −15
9 x -20 ≤ 9 x 5/9 (F−32) ≤ 9 x -15
-180≤5(F−32)≤ -135
-180≤5F-160≤ -135
-180 + 160 ≤ 5F - 160 + 160 ≤ -135 + 160
-20/5 ≤ 5F/5 ≤ 25/5
-4 ≤ F ≤ 5
Step-by-step explanation:
- multiply everything by 9
- distribute the bracket
- add 160 to both sides
- divide both sides by 5
since the coefficient of F is positive, the inequality signs would not change.