If the straight line that passes through (2, 1) and (5, 7) is drawn accurately, it passes through the point (20, y). What number does y stand for?

What is the square root of 45? (step by step working plz)

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Need showing work for this problem 56.25 ×25.80