Answer:
For domain,
9-x2>=0
or,(x+3)(x-3)<=0
using wavy curve method,we get
Domain=[-3,3]
As domain matches only in first option,so the correct option is option first
Answer:
Step-by-step explanation: the discount on the original price is a 20% discount, so it is 20% of x, or 0.2x.
We are told the discount is $3, so 0.2x = 3. Now we solve the equation for x.
0.2x = 3
Divide both sides by 0.2.
x = 3/0.2
x = 15
The regular price is $15.
40. Think about it like this, 50 percent of something is half of it. If you divide 80 by 2 you will get 40! Also you can multiply 80 by the decimal equivalent of 50% which is .5! so 80 * .5 =40!!