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What term makes it inconsistent y=2x - 4

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.