Homework Help: 8th Grade Algebra Answer Check

Posted by <3Medic+Droid<3 on Sunday, January 25, 2009 at 10:36am.

Josh and Racquel sold corn dogs and burritos at the math club fundraiser. The corn dogs(c) cost $.35, and the burritos(b) cost $.75. They sold a total of 600 items, and raised $360.
a)Write an equation for the total # of items sold.
b)Write and equation for the total cost of the items.
c) The equations form a system. Solve the system to find the # of corn dogs and burritos sold.

~my answers~
a) c+b=600
b)$.35c+$.75b=$360
c) c=225
b=375

Firstly, I find it weird to sell corn dogs and burritos together. Still, I would love to know if I got it right.

Oh and what is a matrix? I have to make one for the system, but i can't even remember what they are! (how the heckz did i pass my finals?!?)

Anyway, any help would be very much appreciated. Thanks!

8th Grade Algebra Answer Check - drwls, Sunday, January 25, 2009 at 11:19am
Your answers are correct.

A matrix is a set of rows and columns of numbers. In this case the numbers of the matrix would be the coefficients of c and b in the two equations, or the coefficients of one variable and the sum. They can be used to solve systems of linear equations such as these. For example

c =
|600 1|
|360 .75|
__________
|1 1|
|.35 .75|

= (450-360)/(.75-.35) = 90/.4 = 225
8th Grade Algebra Answer Check - <3Medic+Droid<3, Sunday, January 25, 2009 at 11:22am
Thank you so much!
math - christeria, Wednesday, February 11, 2009 at 10:42am
c=
600 1
360.75

1 1
.35.75
= 450-360
.75-.35=90
.4=225

Answer this Question

Related Questions

economics - When the price of corn dogs is $1.00, 5,000 corn dogs are demanded. ...
economics - if land suitable for growing corn is also suitable for growing ...
Algebra - Josh and Racquel sold cookies and brownies at the math club bake sale...
Math - A pet shop has a total of 17 dogs and birds. Altogether there are 48 feet...
Algebra Systems with Substitution - I have a similar problem to <3Medic+...
Math - A vendor sold 2/3 of his hot dogs in the morning and 1/6 in the afternoon...
Math - Josh has a job walking dog.he walks a total of 18 dogs each week. Today,...
Math - Please show me how to solve the following problem: The ocncession stand ...
math - At a football game, a vender sold a combined total 210 of sodas and hot ...
math - At a hockey game, a vender sold a combined total of 192 sodas and hot ...

For Further Reading

First Name:
School Subject:
Answer: