Answer:
Percent markdown = 14%
Step-by-step explanation:
Given:
Original price of DVD player = $175.90
Markdown price of DVD player =$153.77
To find percent markdown.
Amount of mark down 
Percent markdown 
I hate quadratic formula it’s so hard
Answer:
99 degrees
Step-by-step explanation:
angle 8 = 99 degrees because corresponding or 'f shaped' angles are equal
Circumference = 2πr
r = 9
Circumference = 2π(9)
Circumference = 18π
Circumference = 18(3.14)
Circumference = 56.52
Distance: 56.52 meters
Before we do this problem, let's go over a little algebra terminology.
The number in front of your variable is called your <em>coefficient </em>and notice that the <em>x</em> at the end of the problem does not have a coefficient.
When that happens, when there is no number in front of your variable, you can put a 1 there to fill that position. So -x can be thought of as -1x.
Next let's change all our minus signs to plus negatives.
So the problem reads 3x + 5 + 7x + -3 + -1x + 2.
Now let's simplify this by combining like terms.
We can combine our "x" terms first.
3x + 7x + -1x simplifies to +9x.
Now, 5 + -3 + 2 simplifies to 4.
So our answer is 9x + 4.
