Determine whether the function f: zxz → z
is one-to-one? is onto?
a) f(m, n) =m+n.
b) f(m, n) = m2 + m2.
c) f(m, n) =m.
d) f(m, n) = n.
e) f(m, n) =m- n.

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

1- 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.2- 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 the first question?