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Mathematics 7 Online
OpenStudy (anonymous):

Please someone can help me with #18. 20, 21. Thanks.

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

Let's start with #18

jimthompson5910 (jim_thompson5910):

how many blue cards does Aquil have?

OpenStudy (anonymous):

40

jimthompson5910 (jim_thompson5910):

yes

jimthompson5910 (jim_thompson5910):

`The ratio of blue cards to red cards is 8:9` this translates into the equation 40/x = 8/9 where x is the unknown number of red cards that Aquil has. Solve for x and tell me what you get.

OpenStudy (anonymous):

45

jimthompson5910 (jim_thompson5910):

yep x = 45 is correct

jimthompson5910 (jim_thompson5910):

so there are 45 red cards in Aquil's deck

OpenStudy (anonymous):

so in total Aquil's haved 85 cards

jimthompson5910 (jim_thompson5910):

yes 40+45 = 85

OpenStudy (anonymous):

Tm_thompson5910 for your help

jimthompson5910 (jim_thompson5910):

you're welcome

OpenStudy (anonymous):

can you give me a help with # 20 , 21 Please.

jimthompson5910 (jim_thompson5910):

x = amount of water you need to solve the equation 4/2.5 = 10/x

OpenStudy (anonymous):

10x2.5 = 25 cups of water

jimthompson5910 (jim_thompson5910):

so 4x = 25 what is x?

OpenStudy (anonymous):

4/10

jimthompson5910 (jim_thompson5910):

no

jimthompson5910 (jim_thompson5910):

divide both sides by 4

OpenStudy (anonymous):

sorry I don't understand

jimthompson5910 (jim_thompson5910):

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jimthompson5910 (jim_thompson5910):

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