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Sorry but i did not understand the 14th and the 15th question but i can you with the other questions.
Step-by-step explanation:
12. To find x, we have:
50° + 150° + 100° + x = 360° (The sum of a quadrilateral is 360°)
= 300° + x = 360°
= x = 360° - 300°
= x = 60°
13) Cube root of 216
216 = 2 x 2 x 2 x 3 x 3 x 3
3√216 = 2 x 3
3√216 = 6
Hope it helps you!
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