What is the percent of decrease from 500,000 to 200,000?

What is the solution of the systems of equations? y=2/3x+3 x=-2

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)