15c
The team has fifteen members and each member sells an unknown amount of coupon books.
Answer:
discount:deduct an amount from (the usual price of something).
tip:give (someone) a sum of money as a reward for a service
markup:the amount added to the cost price of goods to cover overheads and profit.
Sales tax:a tax on sales or on the receipts from sales
The equations for the horizontal and vertical lines passing through the point (6,9) is y = 9 and x = 6 respectively
<u>Solution:</u>
Given, point is (6, 9)
We have to find the equations for horizontal and vertical lines passing through above given point.
Now, let us find horizontal line,
We know that, horizontal line is parallel to x – axis, so slope of our required line is 0.
The point slope form is given as 
Then, line equation in point slope form ⇒ y – 9 = 0(x – 6)
⇒ y – 9 = 0
⇒ y = 9
Now, let us find vertical line,
We know that, vertical line is parallel to y – axis, so slope of our required line is undefined 
Then, line equation in point slope form ⇒ 
⇒ x – 6 = 0(y – 9)
⇒ x – 6 = 0
⇒ x = 6
Hence, the horizontal line equation is y = 9 and vertical line equation is x = 6.
Answer:C
Step-by-step explanation:
You can google it and it’ll show you how to do so