D------------------------
Answer:
x^3+7x^2−9x−63
Step-by-step explanation:
can i please have brainliest
Thanks, you two, bless you.
x correct answers
23 - x incorrect answers
82 = 4x + -1(23 - x) = 3x - 23
105 = 5 x
x = 105/5 = 21
21 right 2 wrong 2 unanswered
Check: 4(21) -1(2) = 84-2=82 good
The second answer I believe. Sorry if I am wrong.