A plant is 20 inches tall. If the plant grows 2h inches each week for the next 4 weeks, and h inches for each of the 2 weeks after that, which expression shows the height of the plant , in inches, after 6 weeks?

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