Which system of inequalities is shown

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?