for every 30 minutes of TV air time there are 8 minutes of commercial. If 90 minutes of TV or are now how many how many minutes a commercial will be there

Answer: 24 minutes of commercials.

Step-by-step explanation: Divide 90 by 30 to figure out how much you're going to multiply the 8 minutes of commercial by.

The answer is three, then multiply three by the 8 minutes of commercial to get the answer for how many minutes a commercial will be if there were 90 minutes of TV air time.

For every 30 minutes there are 8 minutes, so you just multiply the constant figure which is three by the number that has not yet been changed.

Let m = minutes of commercial

30/90 = 8/m

Solve for m.

90 (8) = 30m

720 = 30m

720/30 = m

24 = m