Homework Help: math

Posted by chemiii on Tuesday, October 3, 2006 at 10:34pm.

The equation d =70t represents the distance in miles covered after traveling at 70 miles per hour for t hours.....what is d when t = 2.5?

...what is t when d =210?
please help im desperate here...iv been studying all day help me my brain hurts!!!!!!!!!!!

Now settle down and try to understand what is being asked here. You're given the formula
d=r*t where d is the distance traveled, r is the speed and t is the time taken. In this case r=70 so the formula is
d=70*t
If you want to know what d is when t=2.5, substitute 2.5 for t to get
d=70mph*2.5hr
Can you solve for d?
For the second one you're given
210mi=70mph*t
Can you solve for t?

math - Noah, Sunday, October 14, 2012 at 5:04pm
d = 175 mi

t = 3 hrs

Answer this Question

Related Questions

math - The equation d =70t represents the distance in miles covered after ...
Math - You walk at 4 miles per hour for 1/2 hour, and then jog at 6 miles per ...
math - substitute to find the value of the expression. A train must cover a ...
math - Hannah took a trip yo visit her cousin. She drove 120 miles to reach her ...
math - two airplanes left the same airport traveling in opposite direction. if ...
Math - john's columm covered the first 12 miles in 4 hours. he then ...
math - your family is driving to houston,texas.A sign indicates that you are 700...
MATH - From HOME TO THE FAIR IT'S 70 MILES, I have driven about 30 miles at ...
pre-algebra - your family is driving to houston,texas.A sign indicates that you ...
math word problem - Here's the latest from the UMW math department: Andy ...

For Further Reading

First Name:
School Subject:
Answer: