Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.To keep in shape, Dillon exercises at a track near his home. He requires 50 minutes to do 10 laps running and 5 laps walking. In contrast, he requires 47 minutes to do 9 laps running and 5 laps walking. Assuming he maintains a consistent pace while running and while walking, how long does Dillon take to complete a lap?Dillon takes _ minutes to run a lap and _ minutes to walk a lap.
Q. Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.To keep in shape, Dillon exercises at a track near his home. He requires 50 minutes to do 10 laps running and 5 laps walking. In contrast, he requires 47 minutes to do 9 laps running and 5 laps walking. Assuming he maintains a consistent pace while running and while walking, how long does Dillon take to complete a lap?Dillon takes _ minutes to run a lap and _ minutes to walk a lap.
Define Lap Times: Let's denote the time it takes Dillon to run a lap as r minutes and the time it takes to walk a lap as w minutes. We are given that 10 laps running and 5 laps walking take 50 minutes, which gives us the equation 10r+5w=50.
Form Equations: Similarly, we are given that 9 laps running and 5 laps walking take 47 minutes, which gives us the equation 9r+5w=47.
Eliminate Variable: We now have a system of two equations. We need to eliminate one of the variables, r or w. We choose to eliminate w because its coefficients are the same in both equations.
Solve for r: To eliminate w, we can subtract the second equation from the first equation. This gives us 10r+5w−(9r+5w)=50−47, which simplifies to r=3.
Substitute and Solve: Now that we have the value for r, we can substitute it back into one of the original equations to solve for w. We'll use the first equation: 10(3)+5w=50, which simplifies to 30+5w=50.
Final Results: Subtracting 30 from both sides of the equation gives us 5w=20, and dividing both sides by 5 gives us w=4.
Final Results: Subtracting 30 from both sides of the equation gives us 5w=20, and dividing both sides by 5 gives us w=4.Therefore, Dillon takes 3 minutes to run a lap and 4 minutes to walk a lap.
More problems from Solve a system of equations using elimination: word problems