Answer:
$1.50
Step-by-step explanation:
15*.10=1.50
Answer:
$2.33 per notebook
Step-by-step explanation:
$6.99 /3 notebooks
$2.33 per notebook
<h3>The volume of cube is 729 cubic centimeter</h3>
<em><u>Solution:</u></em>
<em><u>The surface area of cube is given as:</u></em>
![Surface\ area = 6a^2](https://tex.z-dn.net/?f=Surface%5C%20area%20%3D%206a%5E2)
Where, "a" is the length of side of cube
Given that, surface area = 486 square centimeter
![486 = 6a^2\\\\a^2 = \frac{486}{6}\\\\a^2 = 81\\\\a = 9](https://tex.z-dn.net/?f=486%20%3D%206a%5E2%5C%5C%5C%5Ca%5E2%20%3D%20%5Cfrac%7B486%7D%7B6%7D%5C%5C%5C%5Ca%5E2%20%3D%2081%5C%5C%5C%5Ca%20%3D%209)
<u><em>Find the volume of cube:</em></u>
![volume\ of\ cube = a^3\\\\volume\ of\ cube = 9^3\\\\volume\ of\ cube = 9 \times 9 \times 9\\\\volume\ of\ cube = 729](https://tex.z-dn.net/?f=volume%5C%20of%5C%20cube%20%3D%20a%5E3%5C%5C%5C%5Cvolume%5C%20of%5C%20cube%20%3D%209%5E3%5C%5C%5C%5Cvolume%5C%20of%5C%20cube%20%3D%209%20%5Ctimes%209%20%5Ctimes%209%5C%5C%5C%5Cvolume%5C%20of%5C%20cube%20%3D%20729)
Thus volume of cube is 729 cubic centimeter
The answer is x=22 because you just have to add the two equations together and then solve for 8x+4=180