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by jg.allinsymbols
Tue Feb 10, 2015 3:51 am
Forum: Advanced Algebra ("pre-calculus")
Topic: What is y= -x^3+x in terms of y (so x=)?
Replies: 2
Views: 131

Re: What is y= -x^3+x in terms of y (so x=)?

No way to resolve x as a function of y in any simple elementary level way.
by jg.allinsymbols
Thu Nov 28, 2013 3:59 am
Forum: Intermediate Algebra
Topic: Distance rate time word problem
Replies: 2
Views: 1405

Re: Distance rate time word problem

Make a Rate, Time, Distance table for all numbers in the description. ________________speed_________________time________________distance upstream________16-3=13__________________(___)_________________2 downstream______16+3=19_________________(___)_________________2 RoundTrip_________________________...
by jg.allinsymbols
Sat Nov 02, 2013 4:02 am
Forum: Intermediate Algebra
Topic: Help with systems of equations
Replies: 7
Views: 1681

Re: Help with systems of equations

bellerum23, How you solve graphically depends what you learned in your course up to now. What techniques are you expected to use? Do you make a coordinate table for each equation and plot the points and then draw a line? Do you convert each equation to Slope-Intercept form and use the features to pl...
by jg.allinsymbols
Thu Oct 31, 2013 7:43 pm
Forum: Intermediate Algebra
Topic: Help with systems of equations
Replies: 7
Views: 1681

Re: Help with systems of equations

bellerum23 wrote:(1,2) {y=3x+5}
{y = x + 4}


That appears to be a system of two linear equations in two variables and a point either known or given. That point is NOT a solution of the first equation. It is also not a solution of the system.
2=1+4, FALSE.
2=3*1+5, FALSE.
by jg.allinsymbols
Thu Oct 31, 2013 4:36 am
Forum: Intermediate Algebra
Topic: Algebra problem with two variables
Replies: 2
Views: 1188

Re: Algebra problem with two variables

Difficult to do this using pure text, but easier on paper. Batch size, B=2000 pounds. x pounds of r pound per volume material y pounds of t pound per volume material You want density of mixture to be d pounds per volume. The pounds of x+y divided by volume of x and y must be d. Assume you unknown va...
by jg.allinsymbols
Fri Sep 20, 2013 4:01 am
Forum: Intermediate Algebra
Topic: Rational Expressions and Functions: simplifying etc..
Replies: 2
Views: 1301

Re: Rational Expressions and Functions: simplifying etc..

I am taking an online math class and I have hit a huge bump on the road. I have two weeks left and I am freaking out! I can't seem to understand this at all. I took this class 10+ years ago and most of it comes back as soon as I see just a problem or two done step by step. -7x^2/28x^5y is the first...
by jg.allinsymbols
Mon Sep 09, 2013 5:32 am
Forum: Beginning Algebra
Topic: 5th grade "high math"
Replies: 5
Views: 2719

Re: 5th grade "high math"

Hi all, My 5 th grader was given a packet of challenging word problems. I have not done this stuff in so long that I don't even know where to begin. I want to understand how this works. I need the process. The basic idea of the word problem is this: Suzie wants to break the high score of the game w...
by jg.allinsymbols
Sat Sep 07, 2013 10:08 am
Forum: Beginning Algebra
Topic: What's the difference between these two equations?
Replies: 2
Views: 1579

Re: What's the difference between these two equations?

My textbook asks me to graph out two equations: x^2+y^2=25 and y=sqrt(-x^2+25) I think that algebraically these are identical. In the solutions, the text shows two different graphs. The text says that the first equation fails the vertical line test, because its graph is essentially a circle. Howeve...
by jg.allinsymbols
Sun Sep 01, 2013 7:28 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Homework question
Replies: 3
Views: 1387

Re: Homework question

Hey i'd appreciate it if anyone could help me with this question. If (x-2A)(2x+1)=2x 2 -Bx+10, then A • B = thanks a lot Perform the multiplication indicated by the lefthand member. Arrange the result into decreasing order of the variable, x. You will look at coefficients of terms in corresponding ...
by jg.allinsymbols
Sat Aug 31, 2013 2:18 am
Forum: Beginning Algebra
Topic: Could use some help with simplifying radicals!
Replies: 3
Views: 1912

Re: Could use some help with simplifying radicals!

Some of your pencil-written work on #1 is followable. The steps connected with the arrow make sense. The #13 is much like what I showed in my previous post, except for having the factor of 4 with square root of 18. Incorporate what I showed and you should be able to do the correct simplification. Do...

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