exam Maths Puzzle Numerical Ability

Hi, I'm not sure if this is in the right category. I need to simplify the following: Thank you for your assistance!

1. 8(x + 4) - (x - 5)

2. 28((1/4)z + (1/7))

3. 3

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exam Other Question

This is from beginning algebra chapter 4 section 4.6 # 68. Rewrite the middle term as a sum of two terms then factor completely. This is what I have so far...
12 w ^ 2 + 19 w + 4 how many cubic inches is this box?
Top: 3" wide, 20" long
Side (all 4): 12"
Bottom: 9" wide, 20" long