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Misha Larkins [42]
2 years ago
12

. Find the sum of the first 20 terms of the arithmetic sequence 27, 22, 17, ....

Mathematics
1 answer:
valkas [14]2 years ago
8 0

Answer:

Step-by-step explanation:

a = 27

n = 20

d = -5

L20 = 27 + (n - 1)*d

L20 = 27 + (20-1)*_5

L20 = 27 + 19*-5

L20 = -68

Sum = (a + L)*n/2

Sum = (27 - 68)*20/2

Sum = -41 * 10

Sum = - 410

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Answer:

8x !

Step-by-step explanation:

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How the transformations of the functions f(x)=15tanx and g(x)=tanx+15 differ?
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The transformation of g(x)=15tanx would be achieved by shifting y=tanx graph 15 right. This transformation will cause x'=x+15. This will change the value from tan x into tan(x+15)
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Which represents the solution set of the inequality 5x-9 less than or equal to 21
elena-14-01-66 [18.8K]

Answer:

x ≤ 6

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I need to know how to do Solving Systems of Equations by Elimination
vredina [299]
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7X + 3y = 5


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-3(7x+ 3y = 5) -----> -21x -9y = -15


2) add

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3) solve for the last variable

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4) Subsitute the variable to get the other one

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6 0
3 years ago
What is the rate of change of y with respect to x for this function?​
lilavasa [31]

Answer:

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and

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So,

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So, the average rate of change of y with respect to x over the interval

[-2, 5] is given by ;

=

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Step-by-step explanation:

4 0
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