SOLUTION: Please help me solve this problem: 1) A jazz lounge holds 90 seats. A promoter plans to set up 35 VIP seats at $50 each and the rest at $30 each. How much is the total ticket rev

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Question 938270: Please help me solve this problem:
1) A jazz lounge holds 90 seats. A promoter plans to set up 35 VIP seats at $50 each and the rest at $30 each. How much is the total ticket revenue if the lounge is sold out?
2) A confectioner melts together two different kinds of chocolate to try out a new recipe. She uses 4 ounces of chocolate that's 50% cocoa, and 6 ounces of another chocolate that's 80% cocoa. How many ounces of pure cocoa is in the mix?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
(1):

All 90 seats.
v, VIP seats
r, regular seats
r%2Bv=90,
r=90-v
-
35%2A50%2B%2890-35%29%2A30, the revenue.


3400


(2):
Attention goes to the amount of cocoa.
4%2A%2850%2F100%29%2B6%2880%2F100%29
4%281%2F2%29%2B6%284%2F5%29
2%2B24%2F5
2%2B4%264%2F5
6%264%2F5 ounces cocoa