3. if set a = {-5, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8}
set b = { x: x= 2y +1 and ye w}
find (1) a-b and n(a-b), (ii) b - a and n(b - a) answer it with steps and details, !

Ill mark the brainliest if you me with the these three questions 7,8,9

1- 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. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me