30% converted to a decimal is 0.30
310 x 0.3 = 93 students play an instrument
Given that a pair of shoes has a price of $62, and it is discounted for 20%, so this would mean that $12.4 is discounted to the original price. So the new price would be $49.6. And now, since there is a 5% tax added, $2.48 is added so the new total price would be $52.08. The answer would be option D. Hope this helps.
If the exterior angle is 25o then the interior angle is its supplement.
The interior angle = 180 - 25 = 155 degrees. All angles are equal in the interior.
The sides aren't.
I'm hoping you get an answer besides mine. I can take you so far.
The formula for an interior angle is
180(1 - 2/n) = Interior angle. When you solve this you get
180(1 - 2/n) = 155
1 - 2/n = 155/180
1 - 2/n = 0.86111111
- 2/n = 0.8611111 - 1
2/n = 0.13888888
2 / 0,1388888 = n
n = 14.4
You can google equiangular polygon theorem to see where I got the formula. The problem is that I really don't know how to interpret the answer. It looks like you have 14 conguent sides and 1 that is 0.4 left over. The figure might still be equiangular.
Let x be the number of song points.
Let y be the number of videos points.
We have the first expression:
5x + 7y = 295
We have the second expression:
10x + 3y=150
Solve for y and x:
x = (295 -7y)/5
10 ((295-7y)/5) + 3y = 150
590 - 14y + 3y =150
590 - 150 = 14y -3y
y=40 points
solving for x:
x = (295-7*40)/5
x=3 points/song
If she buy, all songs for 333 points
number of songs = 333 / 3
number of songs = 111
The answer is 111.
