4 years ago

Select all irrational numbers.

1 answer:

6 0

Answer: √10, √27, and √99 are all the irrational numbers from the list.

√10 = √(5*2) = √5 * √2 ----> irrational

√27 = √(9*3) = (√9) * √(3) = 3√3 ----> irrational

√99 = √(9*11) = (√9) * (√11) = 3√11 -------> irrational

√(49) = 7 -----> rational

√(64) = 8 ----------> rational

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A set of cards contains the numbers 1 through 20. Mathieu chooses a card at random, records the number of the card, and then ret

Svetach [21]

There are 4 multiples of 5 between 1-20 5.10.15.20 which are 4/20 aka 1/5 so 1/5 of 200 is 20 times Yaga yeet

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3 years ago

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A pole, 90 cm long, is painted green, white, and black in the ration 3:4:2. What length of the pole is painted black?

ollegr [7]

3u + 4u + 2u = 9u
9u = 90
1u = 90/9 = 10

since black is 2u ( from the ratio given)
2u = 10 x 2 = 20

Answer : 20cm of the pole is painted black.

The bar diagram is in the picture :)