Does anyone know the answer to this.

what percent of 400 is 20.

Ateacher asked his students to vote for an animal to be their class pet. five-eighteenths of the students voted for a rabbit, voted for a snake, and voted for a hamster. which statement is true? more students voted for a hamster than a snake. more students voted for a snake than a rabbit. more students voted for a rabbit than a hamster. more students voted for a snake than a hamster.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

The suare root of 9x plus 7 plus the square rot of 2x equall to 7