jadenmp35 jadenmp35

17-03-2021
Mathematics

contestada

On a piano, the ratio of black keys to white keys is 9 to 13, if there are 88 keys on a piano how many are black?

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22wangjo 22wangjo

17-03-2021

Answer:

36 black keys

Step-by-step explanation:

9(88-x)=13x

792-9x=13x

792=22x

x=36

Hope this helps: )

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