Answer:
A line is identified when you name two points on the line and draw a line over the letters. A line is a set of continuous points that extend indefinitely in either of its direction. Lines are also named with lowercase letters or a single lower case letter.
Answer: below in picture
explanation: also in picture
6:7
?:15
It's some crazy number I worked out but: 12.86 is the best thing I could get lol
71/60. You change the denominators(bottom numbers) to 60 because that is the smallest number that both 10 and 12 can go into. Then you just add.