Answer:

2. 5 + 12

3. 35

4. (3x4) - 3(9)

5. number inside parenthesis should be -50, hence the equation will yield 0

Step-by-step explanation:

2. Changing the order of addends does not change the sum

3. The sum of 0 plus any number is that number.

4. Multiply each addend (numbers inside the parenthesis) individually to the number outside parenthesis.

5. The additive inverse of a number is its opposite number leading to a zero sum of both numbers.

Answer:

a(5-3) = 5a - 3a

(8x)y = 8(xy)

(-9) + 3 = 3 + (-9)

12(1) = 12

17 + (-17) = 0