Answer question 4 please.

Which best explains why this triangle is or is not a right triangle?

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.