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Answer:Number Sets. There are sets of numbers that are used so often they have special names and symbols: ... The numbers you can make by dividing one integer by another (but not dividing by zero). In other words ... If you square a real number you always get a positive, or zero, result. ... x + 7 = 0, x = −7, Integers, set integer.
Step-by-step explanation:
Answer:
39 hours
Step-by-step explanation:
52 × 45 = 2340
2340 mins into hours = 39 hours
hope this helps :)