Lets day the original price of the dvd player was $100,
36% marked down means you pay $64x
64x = $41.60
100x = 100/54 x 41.60 = 4160/64 = #65.00 = original cost
similarly, stereo tuners = 100/78 x 69.42 = 6942/78 = $89 original cost
DVD = 65- 41.60 = $ 23. 40 less
Stereo = 89- 69.42 = $ 19.58 less
Diffrence is $ 3.82
so your answer is the dvd player price was reduced by $3.82 more than the stereo tuner.
C = pi * d
Plug in what we know:
C = 3.14 * 26
Multiply:
C = 81.64
The area is 19.5 and the perimeter is 23.1
Answer:
Both expressions are = to 11 when x is 2.
Therefore, the expressions are equivalent.
