If y varies with x, and y=-20 and x=5, what is x when y=-30?

Mathematics

1 answer:

vladimir1956 [14]2 years ago

3 0

If y = -30, then x = 7.5

Hope this helps.

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Taking into account that there are 3 couples and every couple has an specific way to sit, for simplify the exercise, every couple is going to act like 1 option and it's going to occupy 1 Place. If this happens we just need to organize 5 options (3 couples and 2 singles) in 5 Places (3 for a couple and 2 for the singles)

It means that now there are just 5 Places in the row and 5 options to organized. So the number of ways can be calculated using a rule of multiplication as:

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