Can anyone me with this chunk of the problem?

For 17-20 multiply or add the amount it says above.

Step-by-step explanation:

13. 47.50 dollars / 5 = 9.50 dollars per shirt, $9.50.

14. 39.00 dollars / 6 binders = 6.5 dollars per binder, $6.50.

15. 4.50 dollars / 2 = 2.25 dollars per spiral notebook, $2.25.

16. 180 dollars / 15 = 12 dollars per hour of work, $12.00.

17. $2.25  per spiral notebook * 7 notebooks = $15.75.

18. $6.50 per binder * 2 binders = $13.00

19. $6.50 - $2.25 = $4.25.

20. $6.50 + $9.50 + $2.25 = $18.25.

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

mrbilldoesmath!

answer: a parabola

steps:

(x-1)(x+4)   = x(x+4) - 1(x+4) = (x^2 + 4x) - (x+4)

                = x^2 +4x -x -4   = x^2 +3x -4

which is a parabola

mrb