plz help. The amount of pages in a 3rd graders book can be modeled by f(x) = x^2 + 6x where x represents the number of chapters. If 135 pages are in the book, how many chapters are there?​

we can just plug values in and get x = 9

hope this helps and brainliest please

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is