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4 years ago

Please help ASAP 25 pts + brainliest to right/best answer

Mathematics

1 answer:

Galina-37 [17]4 years ago

8 0

(f + g)(x) = f(x) + g(x)

(f + g)(x) = 3x + 5 + x^2 = x^2 + 3x + 5

Answer: Choice D

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Lana71 [14]

Answer:

Step-by-step explanation:

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3 0

3 years ago

Read 2 more answers

Can anyone help me solve this? Please and thank you!

AveGali [126]

It's the sum of a geometric sequence.

Let's rewrite it a bit:

$\displaystyle\\\sum_{n=1}^{10}8\left(\dfrac{1}{4}\right)^{n-1}=8\sum_{n=1}^{10}\left(\dfrac{1}{4}\right)^n\cdot \left(\dfrac{1}{4}\right)^{-1}=8\sum_{n=1}^{10}\left(\dfrac{1}{4}\right)^n\cdot 4=32\sum_{n=1}^{10}\left(\dfrac{1}{4}\right)^n$

And now let's calculate this sum $\displaystyle \sum_{n=1}^{10}\left(\dfrac{1}{4}\right)^n$ :

$S_n=\dfrac{a(1-r^n)}{1-r}\\\\a=\dfrac{1}{4}\\n=10\\r=\dfrac{1}{4}\\\\S_{10}=\dfrac{\dfrac{1}{4}\cdot\left(1-\left(\dfrac{1}{4}\right)^{10}\right)}{1-\dfrac{1}{4}}=\dfrac{\dfrac{1}{4}\cdot\left(1-\dfrac{1}{1048576}\right)}{\dfrac{3}{4}}=\dfrac{\dfrac{1048575}{1048576}}{3}=\dfrac{1048575}{3145728}=\\=\dfrac{349525}{1048576}$

Now let's calculate the initial sum:

$\displaystyle 32\cdot \sum_{n=1}^{10}\left(\dfrac{1}{4}\right)^n=32\cdot \dfrac{349525}{1048576}=\dfrac{349525}{32768}\approx10.67$

8 0

2 years ago

1.05+5.25+0.75+4.95 pls help me on this problem someone

Leni [432]

I believe this would be 12.45
hope this helps!

7 0

4 years ago

What is the following sum in simplest form? StartRoot 8 EndRoot 3 StartRoot 2 EndRoot StartRoot 32 EndRoot 3 StartRoot 8 EndRoot

Marina CMI [18]

The sum of the equation is $9\sqrt{2}$ and it can be determined by using addition and it can be determined by summation rule in the equation.

<h2>Given that,</h2>

Equation; $\sqrt{8} +3\sqrt{2} +\sqrt{32}$

<h3>We have to determine</h3>

The sum of the equation.

<h3>According to the question,</h3>

To determine the sum of the equation following all the steps given below.

<h3>Equation; $\sqrt{8} +3\sqrt{2} +\sqrt{32}$ </h3>

The sum of the equation is determined by factorizing the equation,

Then,

The sum of the equation is,

$=\sqrt{8} +3\sqrt{2} +\sqrt{32}\\\\= \sqrt{2\times 2\times2 }+ 3\sqrt{2} +\sqrt{2\times 2\times2 \times 2\times2 }\\\\= 2\sqrt{2} + 3\sqrt{2} + 2\times 2\sqrt{2} \\\\= 2\sqrt{2} + 3\sqrt{2} + 4\sqrt{2} \\\\= 9 \sqrt{2}$

Hence, The required sum of the equation is $9\sqrt{2}$ .

For more details about Addition refer to the link given below.

brainly.com/question/25996972

6 0

3 years ago

Find the volume of this rectangular pyramid,

Karo-lina-s [1.5K]

Answer:

56 cubic meter

Step-by-step explanation:

Volume of a pyramid: V=(lwh)/3

So then 7*3*8/3= 7*8 =

56 cubic meter

7 0

3 years ago