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SSSSS [86.1K]
3 years ago
8

What is the value of x

Mathematics
1 answer:
mihalych1998 [28]3 years ago
7 0

Answer:

Step-by-step explanation:

x+15+x+115+90=380 degree(sum of interior angles of four angles is 360 degree)

2x+220=360

2x=360-220

x=140/2

x=70 degree

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8 0
3 years ago
Write the first five terms of the sequence defined by the explicit formula
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<u>Answer:</u>

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We are given the following explicit formula for an arithmetic sequence:

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So to find the first five terms of this sequence, we will substitute the values of n (num here in the given formula:

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a_2=21-2(2)^2\\\\a_2=13


a_3=21-2(3)^2\\\\a_3=3


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Therefore, the first five terms of the sequence defined by the explicit formula a_n=21-2n^2 are 19, 13, 3, -11, -29.


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