2 years ago

Isaiah has $3.45 in dimes and quarters. If he has a total of 24 coins, how many dimes does he have?

1 answer:

8 0

Isaiah has 2 dimes cause he has $3.25 out of quarters

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mihalych1998 [28]

Answer:

2x+3y=5

Step-by-step explanation:

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Travka [436]

$\sum\limits_{k=1}^{\infty}420\left(\dfrac{1}{6}\right)^{k-1}$

The infinite geometric series is converges if |r| < 1.

We have r=1/6 < 1, therefore our infinite geometric series is converges.

The sum S of an infinite geometric series with |r| < 1 is given by the formula :

$S=\dfrac{a_1}{1-r}$

We have:

$a_1=420\left(\dfrac{1}{6}\right)^{1-1}=420\left(\dfrac{1}{6}\right)^0=420\\\\r=\dfrac{1}{6}$

substitute:

$S=\dfrac{420}{1-\frac{1}{6}}=\dfrac{420}{\frac{5}{6}}=420\cdot\dfrac{6}{5}=84\cdot6=504$

Answer: d. Converges, 504.

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cestrela7 [59]

Answer:

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jarptica [38.1K]

Wow good job lol- umm get into it I guess

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