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Earn +20 ptsQ: If 7 key chains cost 55.65ten 12 keychains?
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If 7 key chains cost 15.54 then 15 key chains cost?
The cost is: 15 times 2.22 = 33.3 because one key chain cost 2.22
If 5 key chains cost 11.25 then 15 key chains cost?
If 5 key chains cost 11.5 then one key chain costs 11.5 divided by 5, which is 2.3 so 15 key chains cost 2.3 x 15, which is 34.5Actually the cost of 5 chains is 11.25 not 11.50.so divide 11.25 by 5 to find the cost of one chain = 2.25now multiply 2.25 by 15 to find the cost of 15 chains = 33.75Another way to do it is to see that 15 chains is 3 times more than 5 so multiply the cost of 5 chains by 35x3 = 33.75
If 8 key chains cost 9.20then 16 key chains cost?
If the all cost the same, then the answer is 18.40
What key signature has an F sharp?
Key of F#, key of B, key of E, key of A, key of D, and key of G
Can super key be as primary key?
I think super key is treated as the primary key because in a table their will be only one primary key.
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