Claudia drove 155 miles in 2.5 hours. Which of the following expressions could be used to find how many miles she can drive in 7 hours?
A. 155*7 / 2.5
B. 2.5*7 / 155
C. 155*2.5 / 47
D. 7*2.5*155
I'll be glad to check your answer.
155/2.5 = x/7, so
Answer choice A
Yes, A.
Thank you Ms Sue
You're welcome.
To find how many miles Claudia can drive in 7 hours, we need to determine her average speed per hour and then multiply that by 7.
First, we calculate Claudia's average speed per hour by dividing the total distance she drove (155 miles) by the total time it took her to drive that distance (2.5 hours). This gives us an average speed of 62 miles per hour.
Next, we multiply her average speed by 7 to find how many miles she can drive in 7 hours.
Now let's examine the given options:
A. 155 * 7 / 2.5 -> This expression calculates the average speed as 7/2.5 times the distance, which is incorrect.
B. 2.5 * 7 / 155 -> This expression calculates the product of the time and distance divided by 155, which is incorrect.
C. 155 * 2.5 / 47 -> This expression calculates the average speed as 155 times 2.5 divided by 47, which is incorrect.
D. 7 * 2.5 * 155 -> This expression correctly multiplies the average speed (2.5) by 7 and then by the total distance (155 miles), which gives us the correct answer.
Therefore, the correct expression to find how many miles Claudia can drive in 7 hours is option D.