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Doss [256]
4 years ago
13

At a yard sale, you find a number of paperback books by your favorite author. You have $10 in each book is priced at $.75. Write

a rule for the amount of money you have left as a function of the number of books you buy.
Mathematics
1 answer:
Jet001 [13]4 years ago
8 0
Assume that the number of books you buy is n.
Now since each book costs 0.75$ and you buy n books, therefore, the total amount you pay for all the books can be calculated as follows:
total amount paid = $0.75n

Now, you have 10$ and you have paid $0.75n for the books.
Based on this, the amount of money left can be calculated as follows:
amount of money left = 10 - 0.75n
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the amount of gold present is - 9/10 of an ounce of gold

from this gold they have to split into groups of 1/6 ounce each

so we have to divide 9/10 ounce in to groups of 1/6

for this we have to divide 9/10 by 1/6

\frac{9}{10} / \frac{1}{6}

when dividing fractions we mutiply the first fraction by the reciprocal of the second fraction

reciprocal of 1/6 is - 6/1

\frac{9}{10}*\frac{6}{1} = \frac{54}{10} = 5.4


so the number of groups that can be made is 5 whole groups with 0.4 ounce of gold remaining

the whole number of groups that can be made - 5

5 0
3 years ago
Read 2 more answers
the sum of the first n terms of a sequence is 20 - 10 / 2 ^ n - 1 find the sum of the first five terms​
Travka [436]

Answer:

S_5=\dfrac{170}{9}

Step-by-step explanation:

Given that,

The sum of first n term of a sequence isS_n=20-\dfrac{10}{2n-1}

We need to find the sum of the first 5 terms.

Put n = 5,

S_5=20-\dfrac{10}{2(5)-1}\\\\=20-\dfrac{10}{10-1}\\\\=20-\dfrac{10}{9}\\\\=\dfrac{170}{9}

So, the sum of first 5 terms is equal to \dfrac{170}{9}.

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weeeeeb [17]

Answer:

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3 0
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