SOLUTION: I have gotten help from countless people with these word problems, but no one can answer them or help me solve them.
One car travels 25mph faster than another. One car can trav
Algebra.Com
Question 610912: I have gotten help from countless people with these word problems, but no one can answer them or help me solve them.
One car travels 25mph faster than another. One car can travel 300 miles in the same time it takes another car to travel 450 miles. Fond the speed of the faster car.
Found 2 solutions by Alan3354, josmiceli:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I have gotten help from countless people with these word problems, but no one can answer them or help me solve them.
----------
What sort of help did you get?
------------------------
One car travels 25mph faster than another. One car can travel 300 miles in the same time it takes another car to travel 450 miles. Fond the speed of the faster car.
---
d = r*t
300 = r*t
450 = (r+25)*t
-----
450 = r*t + 25t
450 = 300 + 25t
t = 6
-------
300 = r*t
r = 50
----
r+25 = 75 mi/hr
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Write a equation for each car
For the slower car:
(1)
For the faster car:
(2)
-------------
given:
Substitute this into (2)
(2)
----------------------
Now I have 2 equations and 2 unknowns, so it's solvable
(2)
Substitute (1) into (2)
(2)
(2)
(2)
Plug this back into (2)
(2)
(2)
(2)
(2)
The speed of the faster car is 75 mi/hr
check:
(1)
(1)
(1)
(1)
This is 25 mi/hr less than the faster car, so
answer is correct
-------------
The source of confusion is probably mixing up
the data for the 2 cars. make sure you keep it straight.
RELATED QUESTIONS
a lab needs to make 100 gallons of an 18% acis solution by mixing a 12% acid solition... (answered by josmiceli)
Hi all I am having some problems with my math class I am taking now, but so far I only... (answered by Alan3354)
I need help solving several problems...I wouldn't be on here if I wasn't truly desperate. (answered by jim_thompson5910)
Please help me find the equation within this word problem:
"Two large apples together... (answered by mananth)
Could you please help me solve these four equations and one word problem please, or at... (answered by richwmiller,kenyatrobaugh@odnt.od.k12.in.us)
i need help solving a chapter problem.
its a word problem that many students have... (answered by rwm)
I am really stuck on these two problems. Can someone please explain to me how to do them? (answered by vleith)
Can someone please help me solve these problems, x/14-85>6 and 23>12-x/9? I have no idea... (answered by stanbon,vleith)
How do I tell if an equation is in standard form or not? I know the standard form... (answered by stanbon)