¿cuál es el valor de "a"?​

What properties allow transformation to be used as a problem solving tool

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.