Homework Help: math

Posted by petie on Thursday, December 24, 2009 at 10:13am.

DQ sells 6 times as many orders of french fries as sonic everyday. If both sold 60 more orders DQ would only sell 3 times as many fries. How many do each sell before and after the incease?

math - DrBob222, Wednesday, December 23, 2009 at 4:34pm
S = number FF Sonic sells.
D = number FF DQ sells.
===========================
D = 6S every day.
If each sells 60 more, then
D + 60 = 3(S + 60) or
D + 60 = 3S + 120 or
D = 3S + 120
=========================
The two equators are as follows:
D = 6S
D = 3S + 120
Solve these two simultaneous equation for D and S (before the addition of 60), then add 60 to each to determine the number sold after adding 60 to each. Post your work if you get stuck.

math - petie, Thursday, December 24, 2009 at 9:14am
Where did the 120 come from?

math - PsyDAG, Thursday, December 24, 2009 at 10:35am
The 120 came from a multiplication error.

3(S + 60) = 3S +180

I hope this helps.
math - DrBob222, Thursday, December 24, 2009 at 5:14pm
PsyDAG is correct. I made two errors but they corrected each other; the final two final equations to solve simultaneously are correct.

If each sells 60 more, then
D + 60 = 3(S + 60) or
D + 60 = 3S + 120 or This should be
D + 60 = 3S + 180 which leads to
D = 3S + 120 and that is the same as the original. I was thinking faster than I was writing.
D = 3S + 120

Answer this Question

Related Questions

math - DQ sells 6 times as many orders of french fries as sonic everyday. If ...
math - I'm still having trouble with this DQ sells 6 times as many orders ...
MATH - McDonalds sells 6 times as many orders of French fries as Harry's ...
Calc - a fast food place sells 425 large orders of fries per week at price $2....
Math/Management - MeanBeats is a company that manufactures and sells electronic ...
Math - Each day Danny prepares pies for dessert.He slices each pie into 8 ...
English - How do you write the following sentence grammatically correct: At ...
math - A catering company has 15 customer orders during its first month, for ...
math - a catering company has 15 customers orders during its first month. for ...
statistics - An appliance repair shop owner has fitted the quadratic trend ...

For Further Reading

First Name:
School Subject:
Answer: