4 pounds of books because 60 oz only equals 3.75 pounds.
Answer:
Sorry just need points
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given that,
Length of cube = l = 3x + 2 units
<h3><u>Base Area:</u></h3>
![= l \times l\\\\= (3x+2)(3x+2)\\\\= 3x(3x+2)+2(3x+2)\\\\= 9x^2+6x+6x+4\\\\= 9x^2+12x+4 \ units^2\\\\\rule[225]{225}{2}](https://tex.z-dn.net/?f=%3D%20l%20%5Ctimes%20l%5C%5C%5C%5C%3D%20%283x%2B2%29%283x%2B2%29%5C%5C%5C%5C%3D%203x%283x%2B2%29%2B2%283x%2B2%29%5C%5C%5C%5C%3D%209x%5E2%2B6x%2B6x%2B4%5C%5C%5C%5C%3D%209x%5E2%2B12x%2B4%20%5C%20units%5E2%5C%5C%5C%5C%5Crule%5B225%5D%7B225%7D%7B2%7D)
X - the unit
3x; 4x; 5x - the lengths of the sides
3x + 4x + 5x = 30
12x = 30 |:12
x = 2.5
3x = 3 · 2.5 = 7.5 cm
4x = 4 · 2.5 = 10 cm
5x = 5 · 2.5 = 12.5 cm