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Mathematics, 28.07.2019 16:30 Hruai

Ivy has 4 tiles with pictures of plants and 5 tiles with pictures of animals. ivy keeps all the tiles on a mat with the pictures hidden and mixes them up. she then turns 1 tile face up and finds the picture of a plant on it. she removes this tile from the mat and turns another over tile without looking. what is the probability that the second tile that ivy turns over has a plant on it?

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Answers: 1
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Answer from: Quest

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

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Ivy has 4 tiles with pictures of plants and 5 tiles with pictures of animals. ivy keeps all the tile...
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