Paul looked around after the race began. The dependent clause is: a. Paul looked around

b. the race began

c. after the race began

d. Paul looked around after

c. after the race began

Explanation:

A dependent clause is a type of clause that cannot stand alone and make sense but needs an independent clause to make a meaning.

From the sentence given, "Paul looked around after the race began", the dependent clause here is "after the race began".

This is because if you remove the dependent clause from the sentence, the sentence retains meaning, but the dependent clause does not make a complete meaning.

7x(√x - 7√7) Multiply √7x to "√x" and "-7√7" respectively: 
√7x*√x - 7√7*√7x 
First is to simplify: √7x² - 7√7²x 
Extract the squares: x√7 - 7*7√x 

Then, we simplify: x√7 - 49√x 
After simplifying the equation, I got the answer x√7 - 49√x.