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3 years ago

Which is the value of the equation?

Mathematics

1 answer:

erma4kov [3.2K]3 years ago

4 0

Answer:

A+7

Step-by-step explanation:

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Which one of the following is a factor of the expression

AleksAgata [21]

Answer:

(t-4)

Step-by-step explanation:

5 0

3 years ago

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

Solve for x. 4x + 5 + 3x= 19

marusya05 [52]

4x+5+3x=19

or, 7x+5=19

or, 7x=19-5

or, 7x=14

or, x=14/7

therefore, x=2

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4 years ago

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Answer:

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3 years ago

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aiyana rented a bike and paid . The bike cost to unlock and then per mile. How many$8$5$0.50 miles did Jaiyana bike

Anna11 [10]

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2 years ago