Determine whether f: zx z → z is one-to-one? is onto?
a) f(m, n) = 2m -n.
b) f(m, n) = m2 -n2.
c) f(m, n)=m +n +1.
d) f(m, n) = \m| - inl.
e) f(m, n) = m2 - 4.

With this one. will mark brainliest

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Factor the polynomial, if possible. if the polynomial cannot be factored, write prime. 9n^3 + 27n^2 – 25n – 75