Search found 5 matches

Tue Nov 22, 2011 8:21 pm
Forum: Intermediate Algebra
Topic: Algebra - Inequality word problem (hard)?
Replies: 1
Views: 4939

Algebra - Inequality word problem (hard)?

The toll to a bridge is \$3.00. A three-month pass costs \$7.50 and reduces the toll to \$0.50. A six-month pass costs \$30 and permits crossing the bridge for no additional fee. How many crossings per three-month period does it take for the three month pass to be the best deal? The answer is: more than...
Thu Nov 10, 2011 12:03 pm
Forum: Intermediate Algebra
Topic: Algebra - systems word problem
Replies: 1
Views: 1245

Algebra - systems word problem

The math question in my book that I'm inquiring about has a picture, so I took a picture and uploaded the question. It's #65. http://uploadpic.org/v.php?img=wBAwPTzp7I I've only got two linear equations in 3 variables. I needed one more to create a system of 3 equations in 3 variables. This is what ...
Sat Oct 22, 2011 8:36 pm
Forum: Intermediate Algebra
Topic: Plugging functions into fcn: If f(x + y) = f(x) + f(y)...
Replies: 1
Views: 1778

Plugging functions into fcn: If f(x + y) = f(x) + f(y)...

If f(x + y) = f(x) + f(y) and f(1) = 3, find f(2), f(3), and f(4). Is f(x + y) = f(x) + f(y) for all functions? I don't understand what f(x + y) = f(x) + f(y) is. Is it saying that if you plug in 2 numbers (x + y) into the function f, the value returned will be what would be returned by the same fun...
Tue Oct 11, 2011 4:29 pm
Forum: Intermediate Algebra
Topic: Algebra - Word problem (intermediate)?
Replies: 1
Views: 2303

Algebra - Word problem (intermediate)?

Can someone help me sort this problem out as a formula, while explaining the reasoning? Also, could someone classify what kind of word problem this is? Thanks! A thief steals a number of rare plants from a nursery. On the way out, the thief meets three security guards, one after another. To each sec...
Tue Oct 11, 2011 2:39 pm
Forum: Intermediate Algebra
Topic: When is it necessary to change a percent to a decimal in a w
Replies: 1
Views: 1471

When is it necessary to change a percent to a decimal in a w

It seems that in some word problems, it's not necessary to change a percent to decimal, but in others it is. Below are some examples of what I mean. -------------------------------------- Here is a word problem where percent to decimal is necessary to solve the word problem algebraically: Earnings -...