The correct answer for part A is 5x² +7x -4. 5x³ -x² -8x -7 is the right answer for part B. Polynomials are always closed if under addition or subtraction. The answers of both parts A and B are polynomials. hope that helps let me know if it does
Answer:
C 36
Step-by-step explanation:
1/2(base)(height)
1/2(8)(9)
1/2(72)
=36
Answer: The set of all possible input values
Answer: 216/343 or 0.6297
