Stacy made a necklace using four times as many blue beads as red beads she used a total of 40 beads how many blue beads did stacy use

How do i do this activity, is appreciated

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?

Select all of the following expressions that are equal to 2.5.