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choli [55]
3 years ago
10

Σ^30 (3n + 7) - [?] 1​

Mathematics
1 answer:
netineya [11]3 years ago
7 0

I dont know how to solve this but heres a suggestion: Use PEMDAS

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a piggy bank contained $14.55 in quarters dimes and nickels if there were three more than twice as many dimes as nickels and thr
GarryVolchara [31]
<span>Let x=number of nickels in the piggy bank
(2x+3)=number of dimes in the piggy bank
(3x-3)=number of quarters in the piggy bank

.05x+.10(2x+3)+.25(3x-3)=14.55
.05x+.20x+.30+.75x-.75=14.55

</span>
<span>
1.00x=14.55+.45
x=15
2x+3=33
3x-3=42

The number of nickles in the piggy bank would be 15.
</span>
<span><span>The number of dimes in the piggy bank would be 33
</span></span>
<span>The number of quarters in the piggy bank would be 42. </span>

Hope I was able to help and that this was useful to you!!! :)
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