kieramacphee3946
22.09.2019 •
Mathematics
Ido not understand how one got 7, 20, 39, 64, 95. explain.
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Ответ:
3n^2+4n we replace n with 1 and 3×1^2+4×1=7
we replace n now with 2 and 3×2^2+4×2=20 and so on
Ответ:
x = 12
Step-by-step explanation:
180° = (3x - 6) + (8x + 4) + 50° because all interior angles of a triangle add up to 180°
180° = 11x +48°
11x = 132°
x = 12