# Algebra 2

Use Cramer's rule to find the number of items the company must sell each week to break even.

y= 20x + 200
y= 25x
D= |20 -1|. -20 - (-25)
. |25 -1| D= 5

Dx= |200 -1|. -200 - 0
. |0 -1| Dx= -200

Dy= |20 200|. 0 - 5000
. |25 0 | Dy= -5000

x= Dx/D x= -200/5 x= -40
y= Dy/D y= -5000/5 y= -1000

Is This Right?

1. 👍 0
2. 👎 0
3. 👁 66
1. 20 x - 1 y = -200
25 x - 1 y = 0

D = -20 + 25 = 5

Dx =
| -200 -1 |
| +000 -1 | / 5

= 200/5 = 40 sign ?

Dy =
| 20 -200 |
| 25 +000 | /5

= 5000/5 = 1000

1. 👍 0
2. 👎 0
posted by Damon

## Similar Questions

1. ### College Algebra

A manufacturing company finds that they can sell 375 items at \$2.50 per item and 225 items at \$3.50 per item. If the relationship between the number of items sold x and the price per item p is a linear one: Find a formula that

asked by Amanda on September 15, 2016
2. ### Math

The total cost (in dollars) for a company to manufacture and sell x items per week is C(x)=70x+400. If the revenue brought in by selling all x items is R(x)=90x−0.05x^2, find the weekly profit. How much profit will be made by

asked by Keonn'a on October 25, 2018
3. ### Math

Solve using Determinants and Cramer's Rule? I was absent and missed the lecture on Cramer's rule and Determinants and have no idea how to start the homework.. The directions and problem are as follows: Using Cramer's Rule, set

asked by Euphoria on November 30, 2010
4. ### algebra

The total cost (in dollars) for a company to manufacture and sell x items per week is C=50x+40 whereas the revenue brought in by selling all x items is R=68x−0.3x^2. How many items must be sold to obtain a weekly profit of \$200?

asked by suly on August 8, 2018
5. ### cramers rule

Solve the following linear system for x using Cramer’s rule. Show work. x + 2y – 3z = -22 2x – 6y + 8z = 74 -x – 2y + 4z = 29 Cramer’s rule uses determinants to find the solution Set up a 3by3 matrix using the

asked by linda on August 8, 2007
6. ### Math

A manufacturing company finds that they can sell 300 items at \$3.50 per item and 500 items at \$ 1.50 \$1.50 per item. If the relationship between the number of items sold x x and the price per item p p is a linear one: Find a

asked by Keonn'a on October 16, 2018
7. ### math

A manufacturing company finds that they can sell 300 items at \$3.50 per item and 500 items at \$1.50 per item . If the relationship between the number of items sold x and the price per item p is a linear one : Find a formula that

asked by Keonn'a on October 18, 2018
8. ### Discrete Math

I am really stuck on these problems. I've worked a lot of them but I can't get these. Sometimes I think I know the answer but I can't show how I got it. 1.) Solve each matrix equation for X. 2X + 5A = B 2.) Find the following

asked by Ryan on February 25, 2010
9. ### Algebra 2

suppose that a new company that makes yo yos made 560 yoyos the first week the company overestimated its requirements. The managements intends to decrease the number of yoyo how the company will manufacture by 8 percent each week

asked by Algebra 2 on March 14, 2018
10. ### math

You are a manufacturer of a certain item. You’ve calculated that you can sell 80 of these items for \$5 each and you can sell 60 of these items for \$8 each. Assuming this relationship is linear, write an equation that relates

asked by Cayla on February 2, 2012

More Similar Questions