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frozen [14]
3 years ago
7

Find S16 for 1 + 7 + 13 + 19 +

Mathematics
1 answer:
amm18123 years ago
4 0

S_n=\dfrac{a_1+a_n}{2}\cdot n\\n=16\\a_1=1\\a_{16}=?\\\\a_n=a_1+(n-1)\cdot d\\d=6\\a_{16}=1+(16-1)\cdot6=1+90=91\\\\S_{16}=\dfrac{1+91}{2}\cdot6=46\cdot6=276

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3 years ago
Which intervals show f(x) decreasing? Check all that apply.
wolverine [178]

The intervals which represents those in which case the function, f(x) is reducing are as follows; [–2.5, –2], [–2, –1.5], [1.5, 2], [2, 2.5].

<h3>Which intervals naming the answer choices show the function f(x) decreasing?</h3>

It follows from the complete task content that the x-intervals between which the function value of f(x) is reducing are to be identified from the graph as attached.

On this note, by observation on the graph, it follows that from between the interval; [–2.5, –2], the function f(x) is decreasing.

Also, between the interval; [–2, –1.5], the function f(x) is decreasing.

Also, between the interval; [1.5, 2], the function f(x) is decreasing.

Also, between the interval; [2, 2.5], the function f(x) is decreasing.

Remark: The answer choices are as follows; [–2.5, –2] [–2, –1.5] [–1, 1] [1.5, 2] [2, 2.5) [2.5, 3]

Read more on decreasing intervals;

brainly.com/question/1503051

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4 0
2 years ago
Triangle ABC and its transformation DEF are shown. What transformation of triangle ABC produced triangle DEF?
SVETLANKA909090 [29]

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Step-by-step explanation:

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3 years ago
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Which transformation causes the described change in the graph of the function y = cos x?
kotegsom [21]
Horizontal Shrink: y = cos 2x or if the coefficient of x is greater than 1
Vertical Stretch: y = 2 cos x or if the coefficient if cos x is greater than 1
Horizontal Stretch: y = cos (1/2) x or if the coefficient of x is less than 1
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8 0
3 years ago
I neeeeed help thankyou
Helen [10]

Answer:

what one

Step-by-step explanation:

if it is the left one it is -7(2x)+-7(7)+10x=-4x

7 0
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