Item 8 Find the measure of a central angle of a regular polygon with 7 sides. Round your answer to the nearest tenth of a degree, if necessary.

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+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?