In a class of 30 students, 22 study physics (P) and 19 study chemistry. What is the number of students who study both physics an
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Answer:
Step-by-step explanation:
x - the temperature
y - the number of people
the temperature is between 75 degrees and 110 degrees:
75 < x < 110
the room for 50 people:
0 < y ≤ 50