Rewrite 2x - 2y = 8 in slope-intercept form

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 circumference of a circle with an area of 50.24 cm²?

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.