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by magellan333
Sat Jan 23, 2016 5:03 am
Forum: Beginning Algebra
Topic: LCD inquiry
Replies: 3
Views: 522

Re: LCD inquiry

The instructions were to find the LCD of the three. I factored as follows:

X-7 = x-7
3x-21 = 3(x-7)
6x=6x

Therefore my answer was x-7, 3 and 6x.
by magellan333
Wed Jan 20, 2016 10:23 pm
Forum: Beginning Algebra
Topic: LCD inquiry
Replies: 3
Views: 522

LCD inquiry

X-7, 3x-21, 6x

My answer was 3, x-7, 6x

Correct answer per the book is 6x, x-7.

What happened to the 3?
by magellan333
Wed Jun 03, 2015 8:36 pm
Forum: Intermediate Algebra
Topic: Rational Expression Multiplication
Replies: 1
Views: 736

Rational Expression Multiplication

I have worked and reworked the multiplication below, but can't get the correct answer. Can somebody let me know how the answer provided below is to be reached? Thanks in advance.

ab-a+3b-3 x ab+2a-4b-8
ab+a+4b-4 ab+2a+3b-6

Answer
b^2+b-2
b^2-b-2
by magellan333
Sun Jan 05, 2014 4:18 am
Forum: Intermediate Algebra
Topic: Fraction word problem
Replies: 1
Views: 1490

Fraction word problem

I have worked this a few times and keep ending up with 45/7 for the answer. The book says -9 is the answer. Any help is appreciated! When a certain number is added to the numerator and subtracted from the denominator of the fraction 3/8, the result is 6. What is the number? I have tried the followin...

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