Atruck with a heavy load drove from boston to new york at a speed of 40 mph. after unloading, it returned from new york to boston at a speed of 60 mph. what was the average speed for the whole trip?answer this with an explanation

Answer question above and explain each step : )

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?