How many pennies are represented by each expression below?

1. $3+4(5)$ 

   Hint (a):

   Remember to multiply first, then add.

   Answer (a):

   $23$ pennies

2. $4(3)+7$ 

   Hint (b):

   This one is similar to the one above.

3. $2(3)+5+4(2)$ 

   Hint 1 (c):

   One student, Christy, did it this way:
   
   $(2)(3) = 6$
   $6 + 5 = 11$
   $11 + 4 = 15$
   $15 × 2 = 30$
   
   What did Christy do wrong?

   Hint 2 (c):

   Make sure you do what is inside the parentheses first.

   Answer (c):

   $19$ pennies