Marcus painted one-third of his bedroom in fourth-fifths of an hour. At this rate, how long would it take him to paint the entire room?

2 2/5 hours

Step-by-step explanation:

If Marcus takes 4/5 an hour to paint 1/3 of the room, then you have to multiply 4/5 times 3 for every 1/3 of the room.

Sorry if this is hard to understand, this is my first time answering.

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y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.