Which equation correctly represents the distance between −15.1 and −3.9 on a number line? |−15.2+(−3.9)|=19
−15.1−3.9=−19
−3.9−15.1=−11.2
|−3.9−(−15.1)|=11.2 help ∵∵∵∵

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

For the function f(x)=1/x-2 +5 notice that a=1, h=2, k=5 what are the vertical and horizontal asymoptote

Mr. chen is parking in a lot downtown. the graph shows the relationship between the time and the total cost of parking. evaluate the function for and input of 10.