3 years ago

If a quadrilateral is a parallelogram, then its opposite sides are _____.

1 answer:

3 0

The answer is letter c.

<span>If a quadrilateral is a parallelogram, then its opposite sides are congruent. The congruence is the result of the Euclidean parallel postulate.

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When 7 is subtracted from two third of the square of a number it becomes 17 find the number

Dmitry [639]

Answer: 6 or -6

hello,

Step-by-step explanation:

Let say n the number

$\dfrac{2}{3} *n^2-7=17\\\Longrightarrow\ \dfrac{2}{3} *n^2=24\\\Longrightarrow\ n^2=\dfrac{3*24}{2}\\\Longrightarrow\ n^2=36\\\Longrightarrow\ (n-6)(n+6)=0\\\\n=6\ or\ n=-6\\$