Answer:
For Part A equation: 32 + 4x = 240
A. integers, c. integers rationals, and d. integers rationals reals. it would not be a natural number, because a natural number is a positive number (and sometimes 0)
Answer:

Step-by-step explanation:
Given: 
Let's changed that mixed number to an improper fraction. Now we get:

Let's find out least common denominator. This one is easy, the LCD is 8. Now that we know the LCD, let's convert both our fractions:

We can use
because it is equal to
. Now, all we need to do is subtract the numerators:

A cosine equation with 5pi/8 involved brought down by 2. That is the best I can help from what I remember from High School.
All you have to do is divide 2 by 1/4 to get how many pieces of board you can get.
2 divided by 1/4 is the same thing as 2 times 4,
so
2*4 = 8
8 pieces