Two​ trains, Train A and Train​ B, weigh a total of 220 tons. Train A is heavier than Train B. The difference of their weights is 40 tons. What is the weight of each​ train?

What is the value of r of the geometric series?

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?