Find the distance between the points (-3, -4) and (-5, 2) using the Pythagorean Theorem. pls help my online teachers lessons are trash :(
If you could also explain how to do these, cus I don't get it at all

a
2√5

b
2√10

c
20

d
3√5

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)