Which always share the properties of parallel lines?
a. the intersection of a wall and ceiling
b. the front edges of horizontal shelves in a bookshelf
c. the hands of a clock
d. the top and side edge of a window

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.

From the formula: d=rt we find the other onet=d/r456.68 divided by 46.6the result is 9.8.