Ricardo is building a rectangular wooden box to ship a large item in. he needs the length of the box to be 30 inches longer than the width. he also needs the height of the box to be 5 inches shorter than the width. create an equation to represent the volume of the wooden box in terms of the width. the question wants me to fill in the blank y=_+_x^2-_x. it also asks what the largest width would be.

x³ + 25x² - 150x

Step-by-step explanation:

It is given that,the length of the box to be 30 inches longer than the width. He also needs the height of the box to be 5 inches shorter than the width.

To find the equation to represent volume

Let 'x' be the width of the rectangle

Length = x + 30

Height  = x - 5

Volume of rectangle = Length * width *height

 = (x + 30) * x * (x - 5)

 = x(x + 30)(x - 5)

 = x(x² - 25x -150)

 = x³ + 25x² - 150x

step-by-step explanation:

i am not sure sorry : c

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional