Train A and train B leave a central station at the same time. They travel the same speed, but in opposite directions, with train
A heading towards station A, and train B heading towards station B. Train A reaches station A after 3 h. Train B reaches station B after 2 1/4 h. Station A and B are 420 mi apart. What is the rate of the trains?
you add the time which is 3 and 2 1/4 hours. Then you look at the equation d = r/t. d = distance, r = rate, and t = time. Then you put them in there places like this, 420 = (2 1/4 + 3)/ r. 2 1/4 + 3 = 5.25. Then 420/5.25 to get 80 mph
2x-2(-2+1)=4 Distribute the -2 to the numbers in parantheses. 2x+4-2=4 Combine all numbers 2x+2=4 Subtract 2 from both sides 2x=2 Then divide by two x=1
