historyfanboy101
10.03.2020 •
Mathematics
Select all the expressions that are equivalent to (2n+6)(n+3)
A. 2(n^2+6n+9)
B. 2n^2+6n+18
C. 2n^2+12n+18
D. 12n+18
E. 2(n+3)(n+3)
F. 2(n+3)^2
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Ответ:
A C E and F
Step-by-step explanation:
(2n+6)(n+3)
2(n+3)(n+3)
2(n+3)²
2(n²+6n+9)
2n²+12n+18
Ответ:
x = 172°
Step-by-step explanation:
The inscribed angle of 86° is one half the measure of its intercepted arc x
Thus
x = 2 × 86° = 172°