SOLUTION: Solve. Rudy must play 12 commercials during his 1-hr radio show. Each commercial is either 30 sec or 60 sec long. If the total commercial time during that hour is 10 min, how many

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Solve. Rudy must play 12 commercials during his 1-hr radio show. Each commercial is either 30 sec or 60 sec long. If the total commercial time during that hour is 10 min, how many      Log On


   

Question 128957This question is from textbook
: Solve.
Rudy must play 12 commercials during his 1-hr radio show. Each commercial is either 30 sec or 60 sec long. If the total commercial time during that hour is 10 min, how many commercials of each type does rudy play? This question is from textbook

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
T=THIRTY SEC COMM.
S=SIXTY SEC COMM.
T+S=12 OR T=12-S
.5T+1S=10
.5(12-S)+S=10
6-.5S+S=10
.5S=10-6
.5S=4
S=4/.5
S=8 SIXTY SEC COMM ARE USED.
T=12-8
T=4 THIRTY SEC COMM ARE USED.
.5*4+1*8=10
2+8=10
10=10