I really need help Define a variable, write an inequality, and solve each problem. Check your solution.

33. A number decreased by two is at most four or at least nine.

34. The sum of a number and three is no more than eight or is more than twelve.

35. WEATHER Kenya saw this graph in the local
weather forecast. It shows the predicted
temperature range for the following day. Write an
inequality to represent the number line.

36. REASONING The pH of a person's eyes is 7.2. Therefore, the ideal pH for the
water in a swimming pool is between 7.0 and 7.6. Write a compound inequality to
represent pH levels that could cause physical discomfort to a person's eyes.

37. FIELD TRIP It costs $1000 to rent a bus that holds 100 students. A school is
planning to rent one of these buses for a field trip to an aquarium. The trip will
also have a cost of $15 per student for the tickets to the aquarium. Given that the
total expense for the trip must be between $2000 and $3000, find the minimum
and maximum number of students who can go on the trip. Explain.