Me. if you can show me how you got the answer .
none of these questions are related to each other.
you in advance.

1. 
(a) amount of potting soil he purchased last week
(b) 28 = 2p + 4
(c) 28 = 2p + 4
     28 - 4 = 2p
      24 = 2p
     24/2 = p
     12 = p 
(d) last week, he bought 12 lbs of potting soil

2. F = ma
(a) F/m = a
(b) -25/10 = a
      -2.5 = a
(c) F = ma
     25 = 5m
      25/5 = m
      5 = m

3. 
(a) cost of the t-shirt
(b) 12 + x = 23
(c) 12 + x = 23
      x = 23 - 12
      x = 11
(d) the t-shirt (x) cost $ 11