Answer:
The answer is -24, I think!
Answer:
Discount percentage is 16.4% for the customers who purchase 6- coupon book .
Step-by-step explanation:
Formula

As given
Your station charges $15.95 for an oil change.
Original charge of the oil change for 6 times = 6 × Original charge for oil change .
= 6 × 15.95
= $ 95.7
As a promotion you sell six coupons for oil changes for $80.
Discount = Original charge of the oil change for 6 times - Charge by six coupons for oil changes .
= $95.7 - $80
= $ 15.7
Putting all the values in the above



Discount percentage = 16.4%
Therefore the discount percentage is 16.4% for the customers who purchase 6- coupon book .
Answer:
16.) c. 2x²+7x-15
17.) c. 
18.) D
Step-by-step explanation:
have a wonderful day! :D
Answer:
b
Step-by-step explanation:
Draw the triangle and then use Pythagoras' theorem
distance =

= 19.70 (2dp)