Answer: 10/3 units
Step-by-step explanation: sqrt 100/9= 10/3
If the amount she saved was $6 for 20%, then the formula for finding savings would be cost*percentage.
But if you want to find the original cost, then you play with the current formula until you get this. $6/20%. Have a good one :)
Answer:
A
Step-by-step explanation:
Hopefully this helps
Answer:
When we are trying to square a number say x, to x²,then we multiply the number x with number of powers
here since it is x² we multiply x × x
if it is x³,then x × x × x
Answer:
29: 7
Step-by-step explanation:
![\frac{8}{3x - y} = \frac{5}{x + 3y}](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B3x%20-%20y%7D%20%20%3D%20%20%5Cfrac%7B5%7D%7Bx%20%2B%203y%7D%20)
<em>Cross</em><em> </em><em>multiply</em><em>:</em>
![8(x + 3y) = 5(3x - y)](https://tex.z-dn.net/?f=8%28x%20%2B%203y%29%20%3D%205%283x%20-%20y%29)
<em>Expand</em><em> </em><em>bracket</em><em>:</em>
![8x + 24y = 15x - 5y](https://tex.z-dn.net/?f=8x%20%2B%2024y%20%3D%2015x%20-%205y)
<em>Bring</em><em> </em><em>x</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>1</em><em> </em><em>side</em><em>,</em><em> </em><em>y</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>other</em><em>:</em>
![15x - 8x = 24y + 5y](https://tex.z-dn.net/?f=15x%20-%208x%20%3D%2024y%20%2B%205y)
<em>Simplify</em><em>:</em>
<em>
</em>
<em>Divide</em><em> </em><em>by</em><em> </em><em>7</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>
![x = \frac{29}{7} y](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B29%7D%7B7%7D%20y)
<em>Divide</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>by</em><em> </em><em>y</em><em>:</em>
<em>
</em>
∴ The ratio of x to y is 29:7.