Find the measures of the acute or right angle formed by intersecting lines so that C can be mapped to C' using two reflections The rotations (x, y) - (y,-x) maps C to C’

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. what distance from city a is the point where the truck and the car will meet?

What is the total area of the figure?

3x + 4y = 5 x- 3y = -7 solve by substitution