If stewart and patrick can finish a science project together in 20 minutes, and patrick works four times as quickly as stewart, how long would it take patrick to complete the project alone?

It would take 25 minutes for Patrick to complete the project alone.

Step-by-step explanation:

They did the project in 20 minutes, that is, 100% of the project, so:

In which x is the percentage that Patrick worked and y is the percentage that Stewart worked.

Patrick works four times as quickly as Stewart, so x = 4y.

So

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Patrick did 80% of the project in 20 minutes. We can solve this problem by a simple rule of three, in which the time it would take for him to complete the project alone is 100%. So

20 minutes - 0.8

x minutes - 1

It would take 25 minutes for Patrick to complete the project alone.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: