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likoan [24]
3 years ago
6

Please help . I’ll mark you as brainliest if correct!

Mathematics
1 answer:
Alenkinab [10]3 years ago
7 0

Answer:  9/4 hours or 2.25 hours

Step-by-step explanation:

Sally paints 1/9 an hour and Steve paints 1/3 an hour both of them adding is 4/9 and 4/9 times 9/4=1 so it is 2.25 hours

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6, 8, 10

Step-by-step explanation:

x y and z are three consecutive even numbers

it means that you can write y = x + 2

and z = y + 2 = x + 4

so

  y^2-2=2x+5z\\  (x+2)^2-2=2x+5(x+4)\\x^2+4x+4-2=2x+5x+20

  x^2+4x+2=7x+20\\x^2+4x+2-7x-20=0\\x^2-3x-18=0\\(x+3)(x-6)=0(x=-3\ or \ x=6)

so the solutions are

x = 6

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x = 10

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3 years ago
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3 years ago
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Answer:

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