24. The original price of a DVD is $9. The sale price is 20% off
2 answers:
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Answer: 4 (OPTION 2)
Step-by-step explanation:
1. To solve this problem you must apply the Intersecting secants theorem, as you can see below:
Where:
2. Then you must susbstitute values and solve for x, as following:
Therefore the answer is the second option.
Since the domain are the x-values of the function, we need to find the y-values using those x-values.
- for x=
, 
. Now we have our first ordered pair: 
- for
, 
which gives us our next ordered pair: 
- for x=2,
, so (2,1)
- for x=4,
, so (4,2)
- for x=8,
, so our last order pair is (8,3)
Finally we can plug the points and joint them to create our graph:
- for x=
- for
- for x=2,
- for x=4,
- for x=8,
Finally we can plug the points and joint them to create our graph:
Answer:
48y
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A = h (b₁ + b₂ )
where h is the height and b₁, b₂ the parallel bases , then
A = × 4
× (9x²y + 15x²y )
= 2 × 24x²y
= 48y