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2 years ago

I need help with these two!! Please help! Will give brainliest!!

Mathematics

1 answer:

miss Akunina [59]2 years ago

5 0

Nooooooooooooooooooooooooooooooooooo

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What is the simplified equation of 9(x+3)-(2x+5)?

Zanzabum

Answer:

7x-2

Step-by-step explanation:

9(x+3)-(2x+5)

9x+3 -2x -5

7x-2

4 0

2 years ago

What is the sum of a 7-term geometric series if the first term is -6, the last term is -24,576, and the common ratio is 4?

Zanzabum

<h3><u>Answer:</u></h3>

Hence, the sum of a 7-term geometric series is:

-32766.

<h3><u>Step-by-step explanation:</u></h3>

We have to find the sum of a 7-term geometric series (i.e. n=7) if the first term(a) is -6, the last term is -24,576, and the common ratio(r) is 4.

We know that the sum of the 7-term geometric series is given as:

$S_n=a\times (\dfrac{r^n-1}{r-1})$

On putting the value of a,n and r in the given formula we have:

$S_7=(-6)\times (\dfrac{4^7-1}{4-1})\\\\\\S_7=-32766$

Hence, the sum of a 7-term geometric series is:

-32766.

3 0

3 years ago

Read 2 more answers

Giải các phương trình vi phân sau<br> y' - y/x+1 = 2

KatRina [158]

It looks like the differential equation is

$y'-\dfrac y{x+1}=2$

Multiply both sides by 1/(<em>x</em> + 1) :

$\dfrac{y'}{x+1}-\dfrac y{(x+1)^2} = \dfrac2{x+1}$

The left side is now a derivative of a product,

$\left(\dfrac y{x+1}\right)' = \dfrac2{x+1}$

Integrate both sides with respect to <em>x</em> :

$\dfrac y{x+1} = 2\ln|x+1|+C$

Solve for <em>y</em> :

$y = 2(x+1)\ln|x+1| + C(x+1)$

3 0

2 years ago

Barry has $2 less than Alex.

Virty [35]

Alex has $14, Barry has $12 and Carl has $9

5 0

2 years ago

What is the first quartile of this data set?

xxMikexx [17]

First we have to find the median

The median is 19 when we cross off all the numbers

Now we have 11 12 15 16 and 17 in the first quartile

Cross 11 and 12 and cross 16 and 17, off which leaves you with 15

Answer is option d

6 0

3 years ago