City-Data Forum Algebra. (middle school, grades, profession, score)
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12-28-2013, 10:00 AM
 Location: The Berk in Denver, CO USA 13,086 posts, read 18,660,718 times Reputation: 20306

[quote=Ivorytickler;32774916 need 2 eggs per batch to make enough of something for six people, how many eggs to you need to make a batch large enough to feed 15 people[/quote]
8
5 for the recipe
3 to make deviled eggs because they are so tasty (that would the y in your equation)

12-28-2013, 10:36 AM
 9,053 posts, read 9,190,652 times Reputation: 4658
Sample problem

If you have a mortgage payment on a house that costs \$100,000 and you have a choice of paying
1) \$421.60 per month for 30 years or a total of \$151,777.45
2) \$554.60 per month for 20 years or a total of \$133,103.42

which mortgage is the better deal? Which has the higher interest rate?

If you feel like option 2 is too expensive, and you take option 1, how much money will you still owe on the mortgage after 20 years.

12-28-2013, 10:42 AM
 Location: Whoville.... 25,393 posts, read 29,664,391 times Reputation: 14495
Quote:
 Originally Posted by davebarnes 8 5 for the recipe 3 to make deviled eggs because they are so tasty (that would the y in your equation)
Only 3 eggs for deviled eggs? Must be watching your cholesterol.

12-28-2013, 10:50 AM
 15,721 posts, read 13,139,362 times Reputation: 19623
Quote:
 Originally Posted by Longhornsfan87 But when will I ever need to solve for x or something like that?
Just because they don't call the unknown x doesn't mean you aren't doing algebra.

12-28-2013, 11:08 AM
 338 posts, read 650,166 times Reputation: 115

12-28-2013, 11:24 AM
 15,721 posts, read 13,139,362 times Reputation: 19623
Quote:
 Originally Posted by Longhornsfan87 But how do you do those problems in your head?
Because I am good at math. Other people are good at other things.

It isn't doing then in your head or not that is important but rather knowing how to do them at all. That is why we teach problem solving with math aka algebra.

12-28-2013, 11:29 AM
 338 posts, read 650,166 times Reputation: 115
I'm not good at algebra. I had a brain injury at birth.

I guess I'm doomed to be a failure.

12-28-2013, 11:42 AM
 9,195 posts, read 7,246,365 times Reputation: 22535
Quote:
 Originally Posted by Longhornsfan87 But how do you do those problems in your head?
Why do them in your head? That's why we have pen and paper, calculators, etc.

The thing you need to master is algebraic thinking. That how you figure out how you need to solve the problem.

12-28-2013, 11:46 AM
 338 posts, read 650,166 times Reputation: 115
What do you mean algebraic thinking?

12-28-2013, 11:48 AM
 9,195 posts, read 7,246,365 times Reputation: 22535
Quote:
 Originally Posted by Longhornsfan87 I'm not good at algebra. I had a brain injury at birth. I guess I'm doomed to be a failure.
You are on the internet. You are using English, grammar and punctuation. Your brain seems to be working just fine. There are no special "algebra brains." Don't make excuses.

I was a math tutor in college. The biggest hindrance to people learning algebra, calculus, etc is that they are intimidated by math. They use negative self talk to talk themselves out of learning.

Instead of thinking "I'm doomed," how about thinking "regular people do this everyday. I'll work hard and I'll eventually get it too."

A positive attitude and patience will take you far.
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