In jefferson middle school, 5% of the sixth graders have red hair. if there are 100 sixth graders, how many have red hair?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?