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ad-work [718]
3 years ago
15

Dan is watching the birds in his backyard he watches none of them or 45% are sparrows how many birds are in his backyard

Mathematics
1 answer:
nadezda [96]3 years ago
3 0

Answer:

If 9 of the sparrows is 45% of the birds in the backyard, 9/x = 45/100.

Cross multiply to get 9 * 100 = 45x; simplified is 900 = 45x or 20.

This means that there are 20 birds in the backyard. You can check this by dividing 9/20 which equals 45%

none??' you mean nine?

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lutik1710 [3]

Hello from MrBillDoesMath!

Answer:

10a.     YES

10b.     YES

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10d .    YES

Discussion:

If x = 12

10a. Does (3/4) 12 = 9? Does (36/4) = 9  = 9?  YES

10b. Does 3x = 36? Does 3(12) = 36 = 36? YES

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Thank you,

MrB

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Answer:

Step-by-step explanation:

two step equation

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-----------

check

7.5 - 5/2 = 5

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