# We are using TI-83 to figure out how to make an equation with a word problem. QuadReg

1. Sep 26, 2012

### Seviper

1. The problem statement, all variables and given/known data
A manufacturing company finds that it makes a profit of $20.00 on each article if 600 or fewer are made each week. The profit decreased by 2 cents per article over 600. How many additional articles should be produced per week in order to realized the maximum point? 2. Relevant equations 3. The attempt at a solution 20y - 0.02y 2. Sep 26, 2012 ### Ray Vickson Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua Is y equal the amount of production over 600 units? If so, you should say it, and not assume that the person marking your work is a mind-reader. Doesn't 20y - 0.02y = 19.98y just keep increasing forever as y increases? Your formula just keeps the profit fixed at$19.98 per unit produced; that is not what the question said.

RGV

3. Sep 26, 2012

### Seviper

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

Oh, im confused i just typed EXACTLY what the question said, my teacher probably made a mistake but do you think you could solve it anyway cuz i have no clue what this means

4. Sep 26, 2012

### Ray Vickson

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

What the teacher typed is clear and correct. The issue is what YOU typed, which is incorrect. And, yes, I can solve it, but the point is for YOU to solve it, or at least to make a start.

Here are a couple of hints: what it the profit on item 601? What is the profit on item 602? On item 603? Keep going like that, and try to represent the result by a formula.

RGV

Last edited: Sep 26, 2012
5. Sep 26, 2012

### Seviper

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

i Know how to do that, but it takes a long time. how do i make the equation

6. Sep 26, 2012

### Ray Vickson

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

As for getting an equation: that is the problem you need to solve. I am not allowed to give any more hints; it is up to you now.

RGV

Last edited: Sep 26, 2012
7. Sep 26, 2012

### Seviper

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

EUREKA, i got it the answer is 200 more because the equ'n is -50x square plus 1600. thank you so much

8. Sep 26, 2012

### Staff: Mentor

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

That's not the way it works on Physics Forums. From the rules (https://www.physicsforums.com/showthread.php?t=414380):

Last edited: Sep 26, 2012
9. Sep 26, 2012

### Seviper

Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

oh ok, im sorry today is my first day on this website and this is probably gonna be the only time i use it but thank you Mark and Ray