Value of a machine depreciates by 20% every year. if present value is 16 find its value last year.

X-intercept=-5 y-intercept=2 the equation of the line is

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

The longer leg of a 30-60-90 trangle is 18