This is a clear picture from the last one. can u show me the steps of how u worked out the answer plz

One piece at a time:

4(p+2) means 4 times everything inside the parentheses.
That's 
               4(p)  +  4(2)  =  4p + 8 .

3(2p-3) means 3 times everything inside the parentheses.
That's   
               3(2p)  +  3(-3)  =  6p - 9 .

Now add everything up:

               4p + 8 + 6p - 9 .

Add all the p's together:   4p + 6p = 10p

Add all the plain numbers together:   8 - 9 = -1

The final result is:        10p - 1 .

The answer would be 13.5 minutes.