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mote1985 [20]
3 years ago
10

What’s is the sum of the series?

Mathematics
1 answer:
STALIN [3.7K]3 years ago
7 0

Answer:

<h2>44</h2>

Step-by-step explanation:

\sum\limits_{k=1}^4(2k^2-4)\to a_k=2k^2-4\\\\for\ k=1:\\\\a_1=2(1)^2-4=2(1)-4=2-4=-2\\\\for\ k=2:\\\\a_2=2(2)^2-4=2(4)-4=8-4=4\\\\for\ k=3:\\\\a_3=2(3)^2-4=2(9)-4=18-4=14\\\\for\ k=4:\\\\a_4=2(4)^2-4=2(16)-4=32-4=28\\\\\sum\limits_{k=1}^4(2k^2-4)=-2+4+14+28=44

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Answer:

<u>y = -2x + 7</u>

Explanation:

<em><u>y = mx + b</u></em>

<em><u /></em>

<em>m = slope</em>

<em>b = y-intercept</em>

<em>y = a given y coordinate</em>

<em>x = a corresponding x coordinate</em>

<em />

First, we need to find the slope (m).

1) (4, -1)

2) (2/3)

m = slope = \frac{y_2-y_1}{x_2-x_1} = \frac{3-(-1)}{2-4} = \frac{4}{-2} = -2

plug in the values to the equation <u>y = mx + b</u>

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-1 = -2(4) + b

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now, we can substitute in m and b into the equation y = mx + b

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3 years ago
Which best explains if quadrilateral WXYZ can be a parallelogram?
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Answer:

Step-by-step explanation:

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8 0
3 years ago
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on tuesday a local hamburger shop sold a combined total of 348 hameburgers and cheeseburger. the number of cheeseburger sold was
ANTONII [103]

Answer:

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Step-by-step explanation:

Lets write some equations where H=Hamburgers and C=Cheeseburgers:

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5) Subtract 87 from both sides:

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6 0
4 years ago
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