20 ounces to 25 ounces. what's the percent change.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?