algebra 2 help?

Question

You go to a local mechanic to get your tires changed. The tires cost $300. There is a 6% sales tax, but you get a 10% discount. There is also a $10 non-taxable disposal fee for your old tires, which the mechanic tells you is not subject to discount.

Write a function, d(x) to account for the total after discounts on purchase amount x.

A d(x)=x - 10
B d(x)=x - .10x
C d(x)=x/.10x
D d(x)=x + 10x
E d(x)=x - .10
F d(x)=x - 10x

Answer 1

B d(x)=x - .10x

Answer 2

If x is the cost of the tyres, 0.9 x multiplied by 1.06 will be the purchase cost and we need to add 10 dollars to it. So, we can write,

Purchase prices = 0.954 x + 10 and that doesn't match with any of your given answers.

Answer 3

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