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Algebra help please.?
Okay, so I have a problem that I have to use the substitution method or elimination method for. I will need to graph both of the equations. I have one company (A) selling all of their products for 10% off and another(B) selling items for 20% off items only after the purchase of $20.00. I am not completely sure what the equations should look like. Also, will the graph for (B) begin in the negative since there won't be any savings until there is $20.00 spent?
I appreciate the help you might be able to give me.
Ooops company (B) is 15 % off items after $20... Probably doesn't matter though. The equations will be the same.
1 Answer
- PrakashLv 51 decade agoFavorite Answer
Libby, your understanding is correct.
You purchase x dollars worth of goods from company (A) as well as from (B).
from company (A), your saving, y = 0.1*x
from company (B), your saving, y = 0.15*(x-20)
Now you can draw graph, and yes the graph for (B) will begin in the negative as there won't be any savings, in fact loss in saving, until there is $20.00 purchase.
You can clearly see that, in y = 0.15*(x-20), y is negative for all x < 20.
