Which of the following has a graph that is a straight line?

equation 1: y = 2x + 7
equation 2: y2 = x − 1
equation 3: y = 2x2 + 4
equation 4: y = 3x3

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.