30 = 80*t
t = 30/80 = 3/8 hr
3/8 hr * 60 min/hr = 180/8 = 22.5 min
There is one solution.. for a pair of lines if the lines are perpendicular (these are) they only touch once
10. 24x-8. 11. 5x+6x+2x+15x=28x I hope this is right
45/100 = 9/20
Work: divide by 5
