MATHEMATICS MIDDLE SCHOOL

A store has a sale on books. The price is $17.55 for one book, $16.70 each for 2 books, $15.85 each for 3 books, and $15 each for 4 books. If this pattern continues, how much per book will it cost to buy 7 books

Answers

Answer 1
Answer:

The cost for each book will be \boxed{\$ 12.45} if the person buy 7 books.

Further explanation:

The arithmetic sequence can be expressed as follows,

{a_1}, {a_2}, {a_3}......

Here,a{\text{ or }}{a_1} represents the first term, {a_2} represents the second term, and so on.

The common difference “d” can be obtained as follows,

\boxed{d = {a_2} - {a_1}}

The nth term can be obtained as follows,

\boxed{{a_n} = a + \left( {n - 1} \right)d}

Explanation:

The cost of a book is \$ 17.55.

The cost of a book is \$ 16.70 if the person buys 2 books.

The cost of a book is  \$ 15.85 if the person buys 3 books.

The cost of a book is \$ 15.00 if the person buys 4 books.

The sequence is \$ 17.55, \$ 16.70, \$ 15.85, \$ 15.00.

The first term is \$ 17.55, the second term is \$ 16.70.

The common difference “d” can be obtained as follows,

\begin{aligned}d&={a_2} - {a_1}\n&=16.70 - 17.55\n&=- 0.85\n\end{aligned}

The cost for each book if the person buys 7 books can be obtained as follows,

\begin{aligned}{a_6}&= 17.55 + \left( {7 - 1} \right)\left( { - 0.85} \right)\n&= 17.55 + 6\left({ - 0.85} \right)\n&= 17.55 - 5.1\n&=\$12.45\n\end{aligned}

The cost for each book will be \boxed{\$ 12.45} if the person buy 7 books.

Learn more:

1. Learn more about inverse of the functionbrainly.com/question/1632445.

2. Learn more about equation of circle brainly.com/question/1506955.

3. Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: Middle School

Subject: Mathematics

Chapter: Arithmetic Sequence

Keywords: Store, books, price, $17.55, 2 books, 3 books each cost $16.40, pattern continues, cost, 7 books.
Answer 2
Answer: 1 book is 17.55
2 books is 16.70
3 books is 15.85
4 books is 15
5 books is 4.15
6 books is 4.30
7 books is (3.55)

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Answers

-38 > -83

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You own you have only $1,000 the price of a TV set is 1150 can you buy the TV if you get a 10% discounts

Answers

Answer:

No

Step-by-step explanation:

If you do 1150 divided by 10 you would get 115 would get 1035 so no

Reduce 22/30 to lowest terms and write the denominator in the blank.

Answers

Answer:

11/15. the denominator is 15

Step-by-step explanation:

22/2=11

30/2=15

Hope this helps!

Answer:

Step-by-step explanation:11/15

whisper the numbers in standard form and unit form (1 hundred 3 tens 4 ones). a.15 b.152 c.102 d.290 e.300

Answers

Answer and explanation:

To find : Whisper the numbers in standard form and unit form?

Solution :

According to place value system,

Hundreds       Tens       Ones

So, Writing numbers according to them is whisper by its place value

a) 15

1 tens 5 ones

b) 152

1 hundred 5 tens 2 ones

c) 102

1 hundred 0 tens 2 ones

d) 290

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e) 300

3 hundred 0 tens 0 ones

Final answer:

The numbers in standard form and unit form are: 15, 152, 102, 290, 300

Explanation:

In standard form, the numbers would be expressed as:

a. 15 = 1 × 10 + 5 × 1

b. 152 = 1 × 100 + 5 × 10 + 2 × 1

c. 102 = 1 × 100 + 2 × 1

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e. 300 = 3 × 100 + 0 × 10 + 0 × 1

In unit form, the numbers would be expressed as:

a. 15 = 1 ten and 5 ones

b. 152 = 1 hundred, 5 tens, and 2 ones

c. 102 = 1 hundred, 2 ones

d. 290 = 2 hundreds, 9 tens, and 0 ones

e. 300 = 3 hundreds and 0 ones

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Answers

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Answers

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