Two airplanes leave an airport at the same time. The velocity of the first airplane is
680 m/h at a heading of 39º. The velocity of
the second is 560 m/h at a heading of 129º.
How far apart are they after 2.5 h?
Answer in units of m.

True or false? a triangle can be circumscribed about a given circle

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

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)