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T O P I C R E V I E W
Posted - 03/26/2013 : 21:43:24 Here is the question from the sample problem I was given. ------------------------ The total imports of petroleum (in millions of barrels per day) in a given year is approximated by the polynomial 30x-527x+2082x+6055, where x represents the number of years since 1975. The corresponding total of exports of petroleum is -x+14x+23x+189. Write a polynomial that represents how many more barrels per day were imported than exported in a given year.
To find the polynomial representing how many more barrels per day were imported than exported in a given year, subtract the polynomial representing exports from the polynomial representing imports.
Write the subtraction statement. 30x-527x+2082x+6055-(-x+14x+23x+189)
Change to polynomial being subtracted. -(-x+14x+23x+189)=x-14x-23x-189
*This is where I get lost, I don't understand what, 'Add the terms of degree 3, degree 2, degree 1 or degree 0" what do they mean?
Add the terms of degree 3 30x+x=31x *How did we get 30x?
Add the terms of degree 2 -527x-14x=-541x *How did we get -527x?
Add the terms of degree 1 *How did we get 2082x? 2082x-23x=2059x
Add the terms of degree 0 *How did we get 6055? 6055-189=5866
The combined terms are 31x,-541x,2059x, and 5866.
Therefore, 31x-541x+2059x+5866 million more barrels per day were imported than exported.
Thank you for your help, Respectfully, ~Virginia
1 L A T E S T R E P L I E S (Newest First)
Posted - 03/26/2013 : 21:54:34 I GOT IT!!! yeah,
I figured it out by my self!!
Thank you for being there, in the event that I could not figure it out.
Thank you for all your hard work, Respectfully, ~Virginia