3. A bag of mixed nuts contains almonds and hazelnuts. There are (6x+13) nuts in this particular bag, and (3x-7) of these are hazelnuts. Which expression represents the number of almonds in the bag? a. A. 6x+13(3x-7) B. 3x-7-6x+13 C.6x+13-3x-7 D.3x-7-(6x+13) 4. Simplify each expression. a. 10x - (-7 +6x) b. 12y-(-4-8y) C. 14z-3-(6-5z) d. (-9p+7)-(-9p+3) In 7-8, subtract the expressions. 5. (-4b+15 - 7k) - (6 + 4b - 2k) 6. (71+19+3)-(9-11+2/)