Roy buys a coat for $86.40 which includes an 8% sales tax which equation could you use to find the cost of the coat, c, without the sales tax

86.40  =  c  + 0.08 c  is the equation which can be used to find the cost of the coat, c, without the Sales tax

Step-by-step explanation:

Let us assume the cost of the coat = c

Selling price of coat = $86.40

The sale tax on the coat = 8%

⇒ The sale tax = 8% of c

Calculating the sales tax, we get:

or, the sales tax amount on the cost price of coat = 0.08 c

Now, the Sales Price of coat =Cost Price of Coat + sales Tax Amount

⇒ $86.40  =  c  + 0.08 c

Hence,  86.40  =  c  + 0.08 c  is the equation which can be used to find the cost of the coat, c, without the Sales tax.

i dont know

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer