What is the sum (2/5x+5/8) (1/5x-1/4)? A. 3/5x+2/8
B. 3/5x+3/8
C. 3/5x+5/8
D. 3/5x+7/8

WOULD REALLY LIKE THE ANSWER FAST, my last 5 questions no one answered ;(

How do you solving the solution of each system using elimination?

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 absolute value of the complex number -4-sqrt2i