What is the 8th term of this geometric sequence? 5,-10,20,-40

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

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?