Answer:
20-40
Step-by-step explanation:
Hey There
The interval of 40-50 is
0≤x≤10
the intervals of 20-30 is 0≤x≤4
the intervals of 30-40 is 0≤x≤6
if you add them together then the interval would be
0≤x≤10
this interval is equal to the interval in the one of 40-50 therefore 20-40 is your answer
