Kaiyla44
06.10.2019 •
Mathematics
Complete the solution of the equation. find the value of y when x equals -10.
2x-9y=-38
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Ответ:
2(-10) -9y=-38
-20 - 9y = -38
9y = -20 + 38
9y = 18
y =18/9
y = 2
when x = -10, y = 2
Ответ:
9514 1404 393
D. 17
Step-by-step explanation:
The sum of the exterior angles of a polygon is 360°.
x° +2x° +120° +3x° +18° +120° = 360°
6x +258 = 360 . . . . . . . collect terms, divide by °
6x = 102 . . . . . . . . . subtract 258
x = 17 . . . . . . . . divide by 6