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Algebra problem( two equations)?
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 15% 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.
2 Answers
- Jeff AaronLv 71 decade agoFavorite Answer
At store A, the discount on buying $x is: d = 0.1x
At store B, the discount on buying $x is: d = 0.15(x - 20)
If you want the discount to be the same at the two stores, you have:
0.1x = 0.15(x - 20)
0.1x = 0.15x - 3
0.1x - 0.15x = -3
-0.05x = -3
x = (-3) / (-0.05)
x = 60
You must buy $60 worth of merchandise to make the discounts equal.
