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 part (a).

3. $(2·3)+5+(4·2)$

   Hint (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?

   More Help (c):

   Make sure you do what is inside the parentheses first.

   Answer (c):

   $19$ pennies