13) If a+b+c+d+e=0 and a+c+e=b+d then which of the following is factor of ax^4+bx^3+cx^2+dx+e x+1
x-1
x^2-1
All the above

I think its opinion 3 or all the above am not sure

5) $17.5

5B)491.25

5C) 628.75

4) 8 classrooms

4b) 4 boys and girls

Step-by-step explanation:

24.5 and $428.75

428.75/24.5 is 17.5

428.75+62.5 is 491.25

491.25+137.5 is 628.75

32 and 36

2x2x2x2x2 and 2x2x3x3

GCF is 4.

So, 4(8+9)

8<9

8 homerooms.

4 boys and girls

Hope this helps :D :D :D <3