Answer:
4. x=3
5. 27
Step-by-step explanation:
4. 6(x+1) = 24, because you work the equation backwards and the opposite way, 24/6 then - 1
5. put the numbers from lowest to highest temperature
9'c, -3'c, 22'c, -5'c, 11'c, 15'c
-5'c, -3'c, 9'c, 11'c, 15'c, 22'c
range - is the highest number - lowest
22--5 =22+5 , therefore range is 27
