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Marianna [84]
3 years ago
5

Polo writes a 3 digit number. it has more than 5 ones. it has fewer than 3 tens

Mathematics
2 answers:
nlexa [21]3 years ago
7 0
Wel, if it has fewer than 3 tens, then it cant have a 30 in it.. THerefore the number can be: 129
~Hope this helped
Andre45 [30]3 years ago
3 0
Could it be 26?
more than five ones
less than 3 tens
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Douglas invests money in two simple interest accounts. He invests three times as much in an account paying 14% as he does in an
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Douglas invested $ 1300 altogether

<em><u>Solution:</u></em>

Let x represent the amount invested in the account paying 14% interest.

Let y represent the amount invested in the account paying 5% interest

He invests three times as much in an account paying 14% as he does in an account paying 5%

Which means,

x = 3y

<em><u>The simple interest is given by formula:</u></em>

S.I = \frac{p \times n \times r}{100}

Where,

"p" is the principal

"n" is the number of years

"r" is the rate of interest

<em><u>He earns $152.75 in interest in one year from both accounts combined</u></em>

Therefore,

Combined S.I = 152.75

n = 1 year

<em><u>Considering the account earning 14% interest:</u></em>

S.I = \frac{3y \times 14 \times 1}{100}\\\\S.I = 0.42y

<em><u>Considering the account earning 5% interest:</u></em>

S.I = \frac{y \times 5 \times 1}{100}\\\\S.I = 0.05y

<em><u>Since, Combined S.I = 152.75</u></em>

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Divide both sides by 0.47

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Amount invested together = x + y = 975 + 325 = 1300

Thus he invested $ 1300 altogether

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