Posted by **cassie** on Tuesday, October 11, 2011 at 7:44am.

1. A car travels 20 kilometers per hour faster than a second car. The first car covers 180 kilometers in the same time the second covers 135 kilometers. What is the average speed of each car?

2. The tens' digit of a two-digit number is one more than its units' digit. If the number is divided by the sum of the digits, the quotient. What is the number?

- Algebra -
**bobpursley**, Tuesday, October 11, 2011 at 8:46am
1. F-20=S

180=F*t and 135=S*t or 180=F*135/S or

S=135/180 F put that into the first equation.

2. Makes no sense to me.

- Algebra -
**Reiny**, Tuesday, October 11, 2011 at 8:50am
speed of 2nd car -- x

speed of 1st car -- x+20

time for 2nd car to go 135 km = 135/x

time for 1st car to go 180 km = 180/(x+20)

but aren't these two the same ?

Continue ....

In the second question, it looks like you did not finish the part where it tells us what the quotient is.

let unit's digit be x

then tens digit is x+1

then the number is 10(x+1) + x = 11x + 10

so (11x+10)/(x+(x+1)) = the quotient

continue

## Answer This Question

## Related Questions

- Precalculus - Rosea drives her car 30 kilometers to the train station, where she...
- physics - A car traveling at 98 kilometers an hour comes to a stop in 15 seconds...
- Algebra - 1.A motorcycle has a reserved fuel of 0.5 liter which can be used if ...
- math - Currently, the Toyota Corolla is the best selling car in the world. ...
- math - Currently, the Toyota Corolla is the best selling car in the world. ...
- Intergated chemistry/physics - The Lamborghini Diablo sports car can accelerate ...
- MATH - Andrea made a car trip of 440 Kilometers. She averaged 54 Kilometers per ...
- math - Andrea made a car trip of 440 Kilometers. She averaged 54 Kilometers per ...
- physics - What force is required to accelerate a 950 kilogram car 20 kilometers...
- math - Phil is making a 40-kilometer canoe trip. If he travels at 30 kilometers ...

More Related Questions