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4 years ago

12

Using compatible numbers, which number is the best estimate of 72.67 ÷ 7.8?

1 answer:

LiRa [457]4 years ago

8 0

B is the answer to your question.

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the cost of having one shirt laundered is 6 dollars. each additional shirt costs 4 dollars. write the explicit and recursive for

Katarina [22]

Answer:

<h3>explicit formula- a(n)=6+4(n-1)</h3><h3>recursive formula- a(n)=a(n)-1 +4; a(1)=6</h3>

Step-by-step explanation:

4 0

3 years ago

Find the square root of<br> 49?

const2013 [10]

Answer:

7

Step-by-step explanation:

Factor the number: 49 = $7^{2}$

Apply radical rule: $\sqrt{a^2} = a$ , $a \geq 0$

$\sqrt{7^2} = 7$

7 0

2 years ago

I need to know how to do this problem or the answer please

zubka84 [21]

Answer:

The region in red contains the solutions to the system

Step-by-step explanation:

Check the graph below.

6 0

4 years ago

Help pleaseee <br> Simplify: 4x^3•5x

taurus [48]

Answer:

20x^4

Step-by-step explanation:

5 0

3 years ago

Write the fifteenth term of the binomial expansion of (a^2+b)^20

3241004551 [841]

Answer:

The fifteenth term of the binomial expansion of $(a+b)^{20}$ is $38760\cdot a^{6}\cdot b^{14}$ .

Step-by-step explanation:

Let be a binomial of the form $(a+b)^{n}$ , where $a, b\in \mathbb{R}$ and $n\,\in\mathbb{N}^{+}$ . The expansion of this polynomial is defined below:

$(a+b)^{n} = \Sigma\limits_{k=0}^{n}\,\frac{n!}{k!\cdot (n-k)!}\cdot (a^{n-k}\cdot b^{k})$ (1)

Where:

$n$ - Number of terms of the expanded polynomial.

$k$ - Index associated to $k$ -th term of the expanded polynomial.

For all $n$ -th binomial, we a sum of $n+1$ terms. If the given binomial has a term of $20$ , then we have 21 terms and the fifteenth term of the polynomial corresponds to the $14$ -th term. Then, the fifteenth term of the binomial is:

$c_{14} = \frac{20!}{14!\cdot 6!}\cdot (a^{6}\cdot b^{14})$

$c_{14} = 38760\cdot a^{6}\cdot b^{14}$

The fifteenth term of the binomial expansion of $(a+b)^{20}$ is $38760\cdot a^{6}\cdot b^{14}$ .

8 0

3 years ago