Question

(x)(x+5)(3x-1)=7.6ft. Find the dimensions of the box in inches. Round to the nearest inch. x=width, x+5=length, and 3x-1=height.

Answer 1

First you solve for x. Combine all the terms on the left side. What do you get?

Answer 2

i know how to combine it, i need help on what to next after this: 3x^3+14x^2-5x

Answer 3

Please help me! What do I set it equal to?
3x^3+14x^2-5x

Answer 4

I get 3x^3+14x^2-5x... now what do i do?

Answer 5

Excuse me? Do you know how to do this problem? Are u stuck? I need help! Plz say something!

Answer 6

Sorry my internet connection is bad right now...i tried putting the equation here
http://www.wolframalpha.com/input/?i=%28x%29%28x%2B5%29%283x-1%29%3D7.6

Answer 7

but.... what about converting the feet into inches?

Answer 8

just use the conversion factor 1 feet = 12 inches

Answer 9

i know, but don't i get a whole different kind of answer?

Answer 10

The dimensions in inches of a shipping box at We Ship 4 You can be expressed as width x, length x+5, and height 3x-1. The volume is about 7.6ft^3. Find the dimensions of the box in inches. Round to the nearest inch.

Answer 11

x(x+5)(3x-1)=7,6 so this is the volum
x(x+5)=7,6/(3x-1) and this will be area of base

Answer 12

x^2 +5x =(7,6)/(3x-1)
(3x-1)(x^2 +5x)=7,6
3x^3 +15x^2 -x^2 -5x =7,6
3x^3 +14x^2 -5x =7,6
3x^3 +14x^2 -5x -7,6 =0 multiplie both sides by 10
30x^3 +140x^2 -50x -76=0 divide both sides by 2
15x^3 +70x^2 -25x -38=0

so you need to solve this cubic equation and after you will get the x values so using these values of x you will can calcule easy the lenght and height of this box using these reports added in the first lines of this exercise

width=x
lenght=x+5
height=3x-1