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steposvetlana [31]
3 years ago
5

Find the value of z - 13

Mathematics
1 answer:
leonid [27]3 years ago
8 0

The sum of the measures of the exterior angles of a polygon, taken one per vertex, is 360.

z - 13 + z + 10 + z = 360

3z - 3 = 360

3z = 363

z = 121

z - 13 = 121 - 13 = 108

Answer: z - 13 = 108 degrees

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Step-by-step explanation:

As explain in the question

An upper triangular matric is square matrix with all zeros below its daignal. A lower triangular matrix is a square matrix with all zeros above its diagonal.

(as shown in the attached image)

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8 0
3 years ago
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Step-by-step explanation:

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