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You plant 20 marigold seeds and 12 of them grow into flowers that bloom. If you plant 10 more merigolds, predict how many would bloom

 Jun 8, 2017
 #1
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Use the ratio 20/12. 

\(20 \over 12 \)\(=\)

\(30 \over x\)

Cross multiply, and you'll get \(12x = 20*30\)

\(12x = 600\) 

\(x= 600/12 = 20\) 

Thus, 20 seeds would bloom.

 Jun 8, 2017
 #2
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You plant 20 marigold seeds and 12 of them grow into flowers that bloom. If you plant 10 more ?merigolds, predict how many would bloom?

 

12 / 20 =60% of the marigolds bloomed.

60% =0.6 x 10 =6 more marigolds expected to bloom.

12 + 6 = 18 expected number of marigolds out of 30 planted.

 Jun 9, 2017

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