A collection of nickels, dimes and quarters totals $6. 0. If there are 52 coins altogether and twice as many dimes as nickels, how many of each kind of coin are there?.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.