Find the slope and the y-intercept of the graph of the linear equation y=−1/7x+2. HELP THIS IS SO IMPORTANT I DONT HAVE MUCH TIME! D:

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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

Which best explains why this triangle is or is not a right triangle ?