Which of the following events happened in the late 1780s? A. The US ratified its constitution. B. The US declared its independence. C. The US engaged in the Civil War. D. The US obtained the Louisiana Purchase. I am in a middle of a History exam 50 questions and I need help on this one please!

A

Explanation:

When did the US Constitution get ratified?

On June 21, 1788, the Constitution became the official framework of the government of the United States of America when New Hampshire became the ninth of 13 states to ratify it.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: