# Pre-Algebra

posted by .

On a trip from Lousiana to Flordia, your family wants to travel at least 420 miles in 8 hours of driving. Write and solve an inequality to find what your average speed must be.

• Pre-Algebra -

D = RT (distance = rate x time)
R = rate

8R >= 420
R >= 52.5

## Similar Questions

1. ### math

andys average driving speed for a 4-hour trip was 45 miles per hour. during the first 3 hours he drove 40 miles per hour. what was his average speed for the last hour of his trip?
2. ### math

your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour. A. write an expression …
3. ### pre-algebra

your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour. A. write an expression …
4. ### Algebra 1

Write and solve an inequality. SOLVING MULTI- STEP INEQUALITIES On a trip from Virginia to Florida, the Sampson family wants to travel at least 420 miles in 8 hours of driving. What must be their average rate of speed?
5. ### algebra

write and solve an inequality. on a trip from virginia to florida, the sampson family wants to travel at least 420 miles in 8 hours. what must be their average rate of speed?
6. ### math

A 200-miles trip by an electric automobile must be completed in 4 hours. If it takes x number of hours to travel the first half of the distance, write an equation describing the average speed for the second half of the trip as a function …
7. ### Geometry

On a trip from Virginia to Florida the Smith family wants to travel at least 420 miles in 8 hours of driving, what must their average rate of speed be?
8. ### Math

A family wants to travel at least 420 miles in 8 hours of driving. What must be their average rate of speed?
9. ### math (pre calc)

Imagine that you are driving 150 miles and you want your average speed for the trip to be 60 miles per hour.Imagine that you drive the first half (by distance) of the trip at 50 mph. How fast must you drive on the second half to make …
10. ### Algebra 2

You and a friend take turns driving on a 450 mile trip. Your friend drives for 3.5 hours at an average speed of 60 miles per hours. What must your average speed be for the remainder of the trip if you want to reach your hotel in 4 …

More Similar Questions