3 years ago

I will give brainiest but plzz help fast

Mathematics

1 answer:

Lena [83]3 years ago

8 0

Answer:

Hi there!

The correct answer to this question is: The surface area of the prism is 456 cm^2. The volume of the prism is 408 cm^2

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Find the sum of this arithmetic series. | 26 + 24.5 + 23 + 21.5 + ... - 17.5

emmainna [20.7K]

Answer:

127.5

Step-by-step explanation:

The given series is 26 + 24.5 + 23 + 21.5 + ... - 17.5

The first term of this series is a=26

The common difference is d=24.5-26=-1.5

The last term of the series is -17.5

The nth term is given by:

$u_n=a+d(n-1)$

$26+-1.5(n-1)=-17.5$

$-1.5n=-17.5-26-1.5$

$-1.5n=-45$

n=30

The sum of the series:

$S_{n}=\frac{n}{2}(a+l)$

$S_{30}=\frac{30}{2}(26+-17.5)$

$S_{30}=127.5$

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3 years ago

The equation of a line is y=1/4x-2 What is the equation of the line that is parallel to the first line and passes through (4, –2

STALIN [3.7K]

I believe (4, –2) is correct :)

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2 years ago

What is the slope of the line?

lutik1710 [3]

Answer:

todavía no me la sé pero al rato te mando la respuesta

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3 years ago

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Gnoma [55]

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2 years ago

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How do you solve this equation? 8 - 3 (2m-5)

attashe74 [19]

8 + -3 * 2m + (-3)(-5) = 8 + -6m + 15 = 8 + -6m + 15 = (-6m) + (8 + 15 ) = -6m + 23

so the answer is -6m + 23

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2 years ago