Which of the following shows that polynomials are closed under addition when two polynomials 4x2 − 8x − 7 and −5x + 16 are added?

4x2 − 13x + 9; may or may not be a polynomial
4x2 + 13x − 23; may or may not be a polynomial
4x2 − 13x + 9; will be a polynomial
4x2 + 13x − 23; will be a polynomial

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

it alot will look like this 4.4

it is not that hard all u have to do is plot the graph

step-by-step explanation: