Since the first car travels 55 miles per hour and starts an hour early, by 4:00 it is 55 miles away from the other car. Therefore, the equation is 55+a(some value)+b(another value)=380. If a car travels 55 miles per hour, that means that we add 55 for each hour and 55*x (if x is the number of hours) is the distance traveled. We have accounted for the first hour, so this is similar to saying that they start 55 miles away at 4:00 and go from there. For the other car, since it travels 75 miles per hour, its distance in hours is 75*x (the amount of time spent should be the same if we start at 4:00). Therefore, since they travel away from each other, our total distance is 55+55x+75x=380. Subtracting 55 from both sides (and combining like terms), we get 130x=325. Next, we divide both sides by 130 to get 2.5 hours, or 2 hours and 30 minutes
hope that helps
Answer:
The answer to your question is: 3 weeks and 3/5 almost 4 weeks
Step-by-step explanation:
Need to learn 30 words
Already know 12 words
learn 5 words each week
# of weeks to be ready for the test
# of words need to learn = 30 - 12 = 18
Learn 5 words per week = 18 / 5
= 3 weeks and 3/5 almost 4 weeks
Answer:
Distance, rate and time problems are a standard application of linear equations. When solving these problems, use the relationship rate (speed or velocity) times time equals distance. For example, suppose a person were to travel 30 km/h for 4 h.
It would be 150 because 68 divided by 0.40 (which is 40% as a decimal) is 150.
Make me brainliest if this helped.